Process Description: In industrial wastewater and domestic wastewater treatment, there is a very important physical and chemical treatment technology: coagulation sedimentation method. This kind of water treatment technology uses a wide range of various pollutant indicators to remove high efficiency. The basic principle of the coagulation method is to put the coagulant in the wastewater, because the coagulant for the electrolyte, in the formation of micelles in the wastewater, and the waste water in the colloidal material and even after the addition of coagulant compressed colloidal particles Layer and adsorption bridge role, so that suspended particles in the wastewater and colloids gathered into large proportion of cashmere, to settle. Coagulation sedimentation can not only remove fine suspended particles with a particle size of 10-3 ~ 10-6 mm in waste water, but also remove nutritious substances such as chroma, oil, microbial, nitrogen and phosphorus, heavy metals and organic matter. , Due to economic development, rapid increase in waste water, resulting in coagulation and sedimentation equipment overload operation, in order to solve such problems, efficient mixing precipitation technology made. It is through the improvement of chemical agents, to improve the sedimentation tank precipitation form, thereby greatly shortening the coagulation sedimentation in the structure of the hydraulic retention time, thus greatly improving the coagulation and sedimentation efficiency.

Basic process：

Process Description: to the wastewater after the addition of high-performance coagulant, in the mixing process, the suspended solids in the waste water and dispersed particles in the interaction of molecular forces generated floc, with the stirring, the formation of a large number of alum , And then adding coagulant to the water to accelerate the agglomeration and sedimentation between the particles, and in the settlement process they continue to collide with each other, its size and quality continue to increase, increasing the speed of sediment, the final precipitation separation process.

Technical characteristics: 1, high efficiency, small footprint, significant economic benefits. (5-10 minutes), the sedimentation tank has a high flow rate (2.5-3.5mm / s), which greatly shortens the residence of the water in the treated structure. It is necessary to add a small amount of the medicine to the waste water, mix quickly (3-30s), short reaction time (5-10min) Time to improve processing efficiency;
2, treatment of water quality, social benefits, water quality and considerable benefits. From the water plant, especially the sewage treatment plant several years of operation proved that this process can make the sediment after the turbidity stability in the 3NTU below the filtered water close to 0NTU, which formed a water quality, and social benefits;
3, the impact resistance, the application of a wide range of water: practice has proved that the impact of this technology is strong, when the raw water turbidity, water flow, dosing dose of some changes, the sedimentation tank water turbidity is not the traditional process As sensitive, its design is still a great potential, when the flood season, such as high turbidity and micro-pollution and other special raw water treatment are very effective;
4, the core of this technology for efficient flocculants and coagulants, as well as the design of sedimentation tank, which can be in a short time efficient coagulation, and then in the efficient folding plate sedimentation tank quickly separated to reduce the hydraulic retention time.
5, the technology used to deal with waste water and life of water, you can save processing costs and reduce water costs. Technical process construction period is short, quick.

Process Summary: Complex extraction is based on Lewis acid and alkali theory of an extraction method, select the appropriate complex extractant, extract the waste water can be extracted with the extraction agent of organic matter, to achieve the removal of organic matter in wastewater, while extraction phase Recovery of useful substances by stripping.
The use of similar compatibility principle, select the appropriate organic solvent, the target component is more assigned to the organic solvent, to achieve the purpose of removing organic matter. The process of separating the components in the mixed liquid by means of the difference in the solubility of the components in the raw solvent (the difference in the distribution coefficients of the organic substances in the different solvents) is called liquid-liquid extraction, also known as solvent extraction. Liquid-liquid extraction, which is a new liquid mixture separation technology for industrial production in the 1930s. With the expansion of extraction applications, reflux extraction, double solvent extraction, reaction extraction, supercritical extraction and liquid membrane separation technology have come out, making the separation of liquid mixture is a very viable operating unit.

Basic process：

Process Description: Add a certain amount of solvent (extractant) to the separated mixture (waste water), take measures (such as stirring, adjust the acid) so that the raw material (organic matter in water) and extractant mixed, The equilibrium concentration of the solute in the extraction phase is higher than the actual concentration, and the solute is concentrated from the mixed liquid phase extraction to separate the solute from the other components in the mixture. Organic wastewater is extracted into the organic phase, and the waste water is purified. The extracted oil phase is recovered by stripping (such as alkali stripping, rectification, etc.) to recover organic matter and extractant.

Technical characteristics: 1, the specificity of wastewater, for some types of waste water or specific functional groups of wastewater, as well as organic matter in the water and organic phase in the distribution coefficient of large differences in waste water samples;
2, higher than the chemical precipitation method;
3, than the ion exchange exchange method of good selectivity, mass transfer faster than the distillation of low energy consumption; large capacity of wastewater treatment, short cycle, easy to operate continuously, easy to achieve automated operation;
4, good economic returns, in the management of waste water at the same time, recycling some useful material in waste water, to avoid waste of resources and reduce operating costs.

Process Description: Resin technology for the key part of water treatment for the resin material, mainly divided into adsorption resin, ion exchange resin, chelating resin three categories.
Macroporous adsorption resin is a kind of non-exchange group, has a good macroporous network structure and a large specific surface area, can be selectively through the physical adsorption of organic high molecular material in aqueous solution.
The ion exchange resin is a polymer compound having a functional group (an active group having an exchangeable ion) and having a network structure and insoluble. According to the type of chemical active groups are divided into cationic resin and anionic resin two categories, which can be separately with the solution of cation and anion ion exchange.
Chelating resin is a kind of crosslinking functional polymer material which can form multi-coordination complex with metal ions. The mechanism of chelating resin to adsorb metal ions is through the coordination of functional atoms on the resin with metal ions to form a stable structure similar to that of small molecule chelates.

Basic process：

Process Description: Organic wastewater at a certain flow rate through the resin bed, because the resin has a high surface area and a certain pore size of the porous structure, and by the special functional group modification, can selectively absorb the specific organic wastewater, to achieve the purification of wastewater and recovery of the target compound The
Heavy metal wastewater through the cation exchange resin or chelate resin bed, to achieve heavy metal wastewater discharge standards and valuable metal recovery.
Inorganic acid wastewater, simple carboxylic acid wastewater, some anions (such as fluoride ion) waste through the anion exchange resin, to achieve waste water in the recovery of inorganic acids and simple carboxylic acid and anion removal.

Technical characteristics: 1, mild reaction conditions: in the waste water treatment process without external heat or other power consumption;
2, the processing efficiency is high: for the specific component of organic pollutants in the wastewater, resin adsorption treatment efficiency is high, the treated effluent can reach the standard discharge or back to production;
3, low operating costs: the use of resin technology to deal with wastewater, targeted, and can recover waste water;
4, organic chemical substances, so that the useful materials in the waste of resources, at the same time, after the treatment of water discharge or reuse, thereby reducing the cost of wastewater treatment, and even to profitability;
5, for a wide range: for organic pollutants, the development of macroporous adsorption resin; for electroplating wastewater and other heavy metal wastewater industry to develop chelating resin, the recovery of useful substances; for waste acid and alkali, developed ion exchange resin; Has been widely used in dye intermediates production, pharmaceutical, electroplating industry wastewater treatment.

Process Description: Membrane distillation (MD) is a membrane technology and distillation process combined with the membrane separation process, which hydrophobic microporous membrane as the medium, on both sides of the membrane under the action of vapor pressure, the volatile components of the liquid to steam Form through the membrane hole, in order to achieve the purpose of separation.

Basic process：

Process Description: Wastewater by pH adjustment, and prognosis and then into the membrane distillation system, the waste side of the steam on both sides of the membrane under the action of the steam pressure difference will pass through the membrane hole into the collection side, the waste water is removed small molecules or Rich and thick. The collecting liquid is a low boiling point organic or water.

Technical characteristics: 1, the process is almost under normal pressure, the equipment is simple, easy to operate;
2, in the process without heating the solution to the boiling point, as long as the membrane on both sides to maintain the appropriate temperature difference, the process can run;
3, can use the industrial grade low steam, heating low cost;
4, in the non-volatile solute aqueous solution of the membrane distillation process, because only the water vapor through the membrane hole, so the distillation is very pure;
5, membrane distillation corrosion resistance, anti – radiation;
6, membrane distillation components can be easily designed as a form of latent heat recovery, can further reduce energy consumption;
7, the scope of application: non-volatile chemical concentration and recovery, such as sulfuric acid, citric acid, hydrochloric acid, nitric acid concentration, sodium hydroxide dilute solution concentration; aqueous solution of volatile solute removal and recovery, such as acrylonitrile The treatment of waste water, the treatment of low-alcohol alcohol wastewater, and the removal of ammonia in waste water

Process Introduction: Diffusion dialysis is the use of semipermeable membrane or select the ion exchange membrane through the ion exchange solution from the high concentration side of the membrane through the membrane to the low concentration side of the process of migration. In the environmental engineering is mainly used for acid and alkali waste treatment and recovery. After diffusion dialysis, not only the waste acid solution is processed, and the recovery of the acid, is an economical and environmentally friendly wastewater recycling methods.

Basic process：

Process Description: waste acid first through the pretreatment system, the treatment solution and water into the diffusion dialysis system, respectively, into the raw material room and recovery room, through the diffusion dialysis system to recover the acid, the recovery of acid after concentration directly back to the production In the process, the acidity of the raw material liquid is reduced, and the discharge proceeds to the post-treatment process.

Technical characteristics：1, high recovery rate, acid recovery rate of 80-90%, recovery of acid concentration of about 90% of the original acid concentration;
2, the effective retention of salt and metal ions, the original waste acid water salt and metal ion rejection rate of more than 90%;
3, by molecular diffusion recovery of acid, almost no energy consumption in the operation;
4, the installation and operation costs lower;
5, the environment does not cause secondary pollution.

Process Description: Rare earth iron microelectrolysis is based on the electrochemical reaction in the battery, in the original iron-based microelectrolysis on the basis of a microelectrolysis technology, which is when the special rare earth iron powder immersed in waste water solution, due to The improvement of the electrode potential difference between the rare earth iron powder and the 1.2V is formed, and thus the numerous types of enhanced microcells are formed. In the space where the electric field constitutes an electric field, the organic pollutants in the waste water undergo the redox reaction under the potential difference, Finally to be degraded.

Basic process：

Process Description: Rare earth iron carbon micro-electrolysis reaction conditions are mild, the treatment effect is good, its pH = 5-9 can achieve a good effect between the treatment. The reaction of waste water after collecting water and water quality control, and then through the lift pump into the rare earth iron microelectrolysis reactor, in the reactor after the reaction, monitoring the water quality parameters, if the standard water sprinkler fine pH = 6-9 After the standard discharge or post-processing.

Technical features: 1, the role of a wide range of pollutants. Microelectrolysis treatment can achieve the effect of chemical precipitation and phosphorus removal, and can also remove heavy metals by reduction. It has a good degradation effect on the non-degradable organic matter containing even fluorine, carbon double bond, nitro group and halogen group structure.
2, easy to operate. Regular micro-electrolytic packing has a long service life and easy operation and maintenance. Only a small amount of micro-electrolytic packing is consumed in the process. It can be added only on a regular basis, without any change, which greatly reduces the labor intensity.
3, to reduce secondary pollution. When the wastewater is reacted, its pH is between 5 and 9, relative to the traditional iron-carbon reaction pH = 3 or so, saving the acid cost, while the effluent is maintained at pH = 6-9, saving the cost of acid and alkali, and at least Almost no iron mud solid waste generated, will not cause secondary pollution of water, COD removal rate is high.
4, the reaction speed. General industrial wastewater only need 30 to 240 minutes, long-term stable and effective operation.
5, the application of diverse ways. It can be applied to the non-compliance high-concentration organic wastewater treatment project for the pretreatment of wastewater, but also the production of wastewater in the higher concentration of part of the wastewater alone lead to micro-electrolysis.

Process Description: Low temperature atmospheric pressure wet oxidation of hydrogen peroxide (LCWO) technology is a high concentration of organic wastewater treatment of a new method. The technology under the conditions of low temperature and atmospheric pressure by the role of the catalyst, so that the oxidant has a strong oxidizing ability of hydroxyl radicals, thus destroying the structure of pollutants molecules to achieve the effect of harmless treatment of sewage. The technology has the advantages of simple equipment, simple investment, no need of strict high temperature and high pressure conditions, no toxic byproducts, fast reaction speed, complete oxidation, high efficiency of treatment, easy recycling of the catalyst and no secondary pollution. The method is suitable for treating high concentration refractory organic wastewater in coking, pesticide, dye, petrochemical and leather industries, especially for the treatment of phenol, cyanide, nitrobenzene and aniline containing wastewater. On the discharge of waste water, a treatment can be achieved discharge standards, no need for other post-processing; emissions of large waste water can also be used as a pretreatment method, and biochemical methods and other methods used in combination.

Basic process：

Process flow：

Process Description: Wastewater is preheated from the top of the reactor through the pump, pH adjustment device and preheater to the catalytic reactor bed for catalytic oxidation. The oxidant enters the catalytic reactor from the reactor side in batches to give full play to its oxidation capacity , After the end of the catalytic reaction, the treated wastewater is discharged from the bottom of the catalytic oxidation bed, and the resulting exhaust gas such as CO2 is discharged from the top of the catalytic reaction bed.

Technical characteristics: 1, the oxidant can participate in the reaction after the residue can be self-decomposition, leaving no residue, no secondary pollution;
2, the reaction pressure and temperature are low, low energy consumption, saving operating costs;
3, the reaction using less catalyst, cheap, less residual catalyst pollution;
4, the technology to deal with organic wastewater adaptability, can oxidize the vast majority of organic matter and rapid response;
5, decolorization effect is obvious, the chlorine ions in the wastewater will not affect the removal of organic matter;
6, simple operation, the reaction device is easy to automate control, easy to use in conjunction with other technologies.

Process Description: The use of ultraviolet light, the combination of catalyst and oxidant to degrade organic pollutants, oxidants in the ultraviolet light can produce OH, its oxidation is strong, with organic pollutants in the C joint damage to its double bond and Aromatic chain, so that the cracking of H2, organic matter will eventually become non-toxic harmless CO2 and H2O, while UV light can cause organic matter to produce photosensitization.

Basic process：

Process Summary: Wastewater through the PH mediation tank, to the oxidant dosing tank, mixed tank, into the reaction with the main body of ultraviolet light box, the tank redox reaction, the formation of hydroxyl radicals, free radicals will be organic oxidation of water, oxidation After the generation of carbon dioxide and water, and ultimately after the PH value of the regulation of emissions or reuse.

Technical features: 1, low energy consumption, mild reaction conditions, at room temperature, atmospheric pressure, easy to operate. In the ultraviolet light and sunlight can react.
2, the reaction speed, organic pollutants can be in a few minutes to several hours was completely destroyed, to avoid the formation of polycyclic products.
3, the degradation is not selective, almost any degradation of organic matter.
4, to eliminate secondary pollution, mineralization products for inorganic ions, CO2, H2O.
5, the equipment is simple, high reactivity, cheap, can work continuously, can oxidize ppb level of pollutants, suitable for a variety of specially designed reactor system.
6, for the treatment of chemical, pharmaceutical, printing and dyeing industries such as high salt or difficult to degrade wastewater pretreatment and tail lift.

Process Description: Electrocatalytic oxidation technology is through the role of external electric field in the two-dimensional and three-dimensional electrode surface generated OH, or in the electrolysis system to produce strong oxidizing intermediates (such as Cl2), in order to achieve the degradation of organic matter. Three-dimensional electrolysis is between the two-dimensional electrode filled with granular catalytic packing or other debris-like electrode material, so that the surface under the electric field charged and the formation of numerous micro-electrochemical system to promote the reaction.

Basic process：

Process Description: Raw water to adjust the pH into the air flotation tank, after a certain period of time after the reaction flocculation, the filtrate further into the electrocatalytic module. The electrocatalytic modules were in the order of no membrane electrolysis, film electrolysis, cationic electrolysis, and the units were aerated. The process can be flexible according to the specific circumstances of the required modules.

Technical features: 1, electrocatalytic oxidation unit without adding chemicals, no secondary pollution;
2, the electrocatalytic oxidation conditions are mild, normal temperature and pressure can react;
3, simple operation, only need to adjust the current and voltage, easy to achieve automation;
4, with other technical compatibility, can be independent of the operation can also be coupled with other technologies;
5, for chemical, pharmaceutical, printing and dyeing, pesticides, food and other industries of wastewater treatment and biochemical effluent or process tail to raise the standard.

Process Description: RANS technology is the use of gas diffusion principle and the membrane of low resistance permeability of water / liquid in the carbon dioxide, oxygen or ammonia and other corrosive gases with a chemical removal technology.

Basic process：

Process Description: Ammonia-containing wastewater flows in the shell side of the membrane module (on the outside of the hollow fiber membrane). The acid absorption fluid flows through the membrane module (inside the hollow fiber). Ammonia nitrogen under alkaline conditions, the existence of the following dissociation balance: NH4 + + OH- → NH3 + H2O. Gaseous NH3 can pass through the pores of the hollow fiber surface, from the waste water phase in the shell process into the acid absorption liquid phase of the tube, and the acid solution immediately becomes NH4 +, ie ammonium salt, in the ionic state.

Technical characteristics: 1, high separation effect and precise gas control, compared with the degassing tower, RANS technology greatly increased the gas-liquid contact surface, the shortest gas-liquid separation path, can effectively ensure the gas-liquid separation effect;
2, clean separation technology, compared with the degassing tower, RANS technology provides a closed operating environment, will not be other pollutants into the system, the water quality is a good guarantee;
3, modular design, modular design easy installation, easy expansion;
4, covers an area of small, compared with the degassing tower, RANS system highly centralized modular design, covers an area of 1 / 10-1 / 3 degassing tower technology, greatly reducing the area occupied.
5, for high ammonia wastewater, especially high salt waste and low organic matter content of wastewater.

Process Description: MVR is the abbreviation of steam mechanical recompression technology, which is the use of evaporation system itself to generate secondary steam and its energy, by the steam compressor compression work, to enhance the second steam enthalpy, into the cooling tower, cooling tower Of the cooling water cycle preheating the material. So the cycle to the evaporation system to provide thermal energy, thereby reducing the demand for external energy, an energy-saving technology. As early as the 1960s, Germany and France had successfully used the technology in the fields of chemicals, food, paper, medicine, desalination and sewage treatment. In the process of multi-effect evaporation, the secondary steam of the evaporator can not be directly used as the heat source, only as the secondary or secondary heat source. Such as as the heat source must be additional to its energy, so that the temperature (pressure) to improve. Steam jet pump can only compress part of the secondary steam, and MVR evaporator can compress all the secondary steam in the evaporator, play an energy saving effect.

Basic process：

Process Description: MVR evaporator its working process is the low temperature of the steam by the compressor compression, temperature, pressure increases, increased enthalpy, and then into the heat exchanger condensation, in order to take full advantage of the latent heat of steam. In addition to driving start, the entire evaporation process without the need for steam. The secondary steam from the evaporator is compressed by the compressor, the pressure, the temperature is increased, the enthalpy is increased, and then sent to the heating chamber of the evaporator as a heating steam to keep the feed liquid in a boiling state while the heating steam itself Condensed into water. In this way, the original steam to be abandoned to be fully utilized, the recovery of latent heat, but also improve the thermal efficiency, raw steam economy is equivalent to multi-effect evaporation of 30 effect. To concentrate industrial wastewater as an example: First, the industrial wastewater along the pipeline into the preheater, through the preheater, the preheating of industrial wastewater treatment. And then the preheated industrial wastewater is introduced into the evaporator. In the evaporator, the industrial waste water will be heated, evaporated and concentrated. Finally, the distilled water condensed by the heating of the steam flows into the distilled water collection tank, and the secondary steam and the concentrate The liquid enters the vapor-liquid separator together. In the vapor-liquid separator, the concentrate and the secondary vapor are separated, and finally, the concentrate flows into the concentrate collection tank, and the separated secondary steam is introduced into the mechanical compressor. In a mechanical vapor compressor, the secondary steam is compressed, heated, pressurized, and introduced into the evaporator, and then the industrial waste water is heated, concentrated, evaporated and distilled. Ultimately, through repeated recycling of secondary steam, the completion of the entire industrial wastewater treatment process, and to achieve industrial wastewater treatment and energy conservation of the dual objectives.

Technical features: 1, compact evaporation equipment, small footprint, the required space is also small. But also save the cooling system. For the need to expand the evaporation equipment for the steam, water supply capacity is insufficient, the site is not enough existing plants, especially low temperature evaporation needs of chilled water condensation occasions, you can receive both to save investment and achieve better energy saving effect;
2, MVR evaporator is a traditional multi-effect falling film evaporator replacement products, is based on the single-effect evaporator through the secondary steam countercurrent washing and recompression re-use. All materials for single and multi-effect evaporators are suitable for use with MVR evaporators, are technically completely replaceable, and have better environmental and energy saving features. Evaporation of secondary steam recycling, low energy consumption per unit, low operating costs;
3, smooth operation, high degree of automation, low operating costs;
4, the process is simple, practical, supporting the public works less, less total investment in the project;
5, the use of low temperature negative pressure evaporation (40-100 ℃), is conducive to prevent the evaporation of high temperature material degradation, to ensure product quality.

Process Description: For high COD, high salt wastewater treatment, at present, domestic and foreign common technology iron carbon micro-electrolysis, Fenton, advanced oxidation, these methods are through oxidation and other processes to degrade organic pollutants in wastewater, Convert it to small molecules, and then further evaporate, concentrated desalination. According to the domestic and foreign research on high salt and high COD wastewater treatment, and its own technology research and development, the development of the use of electrodialysis technology to deal with such waste water. Salt water into the electrodialysis system, organic matter retained in the desalination room (ie, liquid room), salt into the concentrated water room. Concentrated water chamber containing less organic matter, salt, generally more than ten percent, can be evaporated to obtain industrial grade salt; freshwater room organic matter as the case of reuse to the process to improve the yield and yield. Or brine straight line TDS exceeded the standard, the use of this process, the salt can be removed most of the water, the liquid room in the organic matter to be concentrated recovery, the wastewater discharge standards.
High concentration of salt water after electrodialysis treatment, the salt removal rate of up to 90%, can be achieved with high concentrations of organic matter salt and organic matter separation, organic matter as the case of resource reuse, salt concentration of about 15% After evaporation, industrial salt is sold or self-balanced. Wastewater after electrodialysis treatment, salt and organic matter effective separation, high concentration of salt water after treatment standards discharge.

Basic process：

Process Description: Wastewater through the pretreatment of water into the electrodialysis system, organic matter retained in the desalination room (ie, liquid room), salt into the concentrated room. Concentrated water chamber containing less organic matter, salt, generally more than ten percent, can be evaporated to obtain industrial grade salt; freshwater room organic matter as the case of reuse to the process to improve the yield and yield. Or brine straight line TDS exceeded the standard, the use of this process, the salt can be removed most of the water, the liquid room in the organic matter to be concentrated recovery, the wastewater discharge standards.

Technical characteristics: 1, for the separation of organic matter and salt in wastewater, can be achieved at the same time organic matter, organic matter and salt separation and salt purification;
2, high current efficiency, low energy consumption, wide range of uses;
3, simple operation, stable operation, environment-friendly.

Process Description: DTRO (disc type reverse osmosis) is a form of reverse osmosis, is dedicated to deal with high concentrations of sewage membrane components, the core technology is disc-type membrane membrane column. DTRO membrane components with a special flow channel design, the use of open flow, the disc surface has a certain way to arrange the bumps. This special mechanical design allows the treatment fluid to flow through the filter surface under the action of the bumps in the form of turbulence collision, increase the transmission rate and self-cleaning function, which effectively avoid the film clogging and concentration polarization, the success of the extension The life of the diaphragm; cleaning is also easy to clean the dirt on the diaphragm to ensure that the disc-type membrane group for relatively poor water conditions.

Basic process：

Process Description: Wastewater through the original pump into the core filter (10μm), to ensure that the membrane turbidity below 5NTU, the filtrate into the high pressure pump after pressurization into the membrane system for salt water separation, water into the water tank , Concentrated wastewater recirculation back to the original tank, making the original tank concentration gradually increased until the concentration limit.

Technical features: 1, film long life;
2, the minimum degree of scaling and pollution;
3, components easy to maintain;
4, high concentration factor;
5, filter diaphragm replacement costs low.

Bipolar film is a new type of cathode, cation exchange membrane, in the anion and cation exchange layer between an intermediate layer, in the reverse DC electric field effect, when the bipolar film reverse pressure, in the direct current Under the action of the field, the rapid migration of salt ions in the membrane is completed, and the dissociation of the interface between the yin and yang layers in the bipolar membrane occurs, and the H + and OH- are dissociated by the cation exchange layer and the anion exchange layer respectively. Based on the bipolar membrane Of this feature, its introduction into the traditional electrodialysis system, constitute a bipolar membrane electrodialysis system. Bipolar membrane electrodialysis system will be anion and cation exchange membrane and bipolar membrane binding, can not introduce new components under the premise of the salt into the corresponding acid and alkali. After the bipolar membrane system can be achieved during the production process of salt within the recycling. This method not only saves the processing cost of industrial salt in the process of production, but also converts the salt into acid and alkali, which reduces the cost of purchasing acid and alkali. It is a cost-effective and environment-friendly method for high salt wastewater. Bipolar membrane system produced by the low brine after electrodialysis concentrated back to the front of the high salt water to achieve the residual salt recycling.

Basic process：

Process Description: High salt wastewater after pretreatment, after entering the bipolar membrane system. Under the action of the electric field, the bipolar membrane system converts the salt into the corresponding acid and base, and the acid and alkali concentration is about 8-10%, which can be reused in the production process. When the salt concentration in the bipolar membrane system decreases To 5% or less, after electrodialysis concentrated, back to the pretreatment unit into the bipolar membrane system.

Technical features: 1, without chemical reagents can be added to the salt into acid and alkali, environmentally friendly;
2, simple operation, stable operation;
3, the industrial waste salt into acid and alkali reuse to the production process, can achieve the industrialization of salt resources;
4, for the preparation of organic acid and alkali low cost, short process.

Process Description: Upstream anaerobic sludge bed technology is an anaerobic biological treatment technology for sewage treatment, also known as upflow anaerobic sludge bed, the English abbreviation UASB (Up-flow Anaerobic Sludge Bed / Blanket). Taught by Professor Lettinga of the Netherlands in 1977. The mechanism is: UASB reactor is a combination of organic matter removal and mud, water, gas separation in one of the integrated wastewater anaerobic treatment process. Anaerobic biological treatment is the use of anaerobic microbial metabolic properties, without the need to provide external energy conditions, to be reduced by the organic matter as hydrogen, while generating energy value of methane gas.
The anaerobic reaction process in UASB reactors is the same as other anaerobic bioprocessing processes, including hydrolysis, acidification, acetic acid production and methane production. The reactor body is divided into two regions, namely, the reaction zone and the gas, liquid and solid three-phase separation zone, which is an anaerobic sludge bed with good precipitation performance in the lower reaction zone. The high concentration organic wastewater enters the reaction through the water distribution system The bottom of the device flows upward through the anaerobic sludge bed, fully interacted with the anaerobic sludge, and the organic matter is converted to water, methane and carbon dioxide, gas, liquid, and solid separated by the top three-phase separator. Effluent COD removal rate can reach more than 80%, volume load 5 ~ 10kgCOD / (m3 · d), the second discharge after discharge standards, the separation of biogas can be used as energy use.

Basic process：

Process Summary: After the pretreatment of waste water, the bottom of the reactor into the reactor, due to a certain flow rate from the bottom of the flow and the anaerobic process of a large number of biogas stirring effect, the waste water and sludge mixed, organic matter Adsorption of decomposition, the biogas produced by the reactor upper three-phase separator discharge chamber, containing suspended sludge wastewater into the three-phase separator settlement area, as biogas has been separated from the wastewater, the subsidence area is no longer subject to biogas stirring The effluent in the process of steady rise, where the sedimentation performance of the sludge from the sedimentation surface to return to the main part of the reactor, thus ensuring a high concentration of sludge in the reactor, containing a small amount of lighter sludge from the reactor Above the discharge.

Technical characteristics: 1, UASB anaerobic sludge concentration is high, the average sludge concentration of 20-40gMLVSS / L;
2, the high concentration of wastewater has a highly efficient economic treatment effect; organic load is high, short hydraulic retention time, for example, the use of medium temperature fermentation, the volume load is generally 10kgCOD / (m3.d)
3, no mixing equipment, by the fermentation process generated by the rise of biogas, so that the upper part of the sludge bed in the suspended state of sludge, the lower part of the sludge layer also has a certain degree of agitation;
4, the sludge bed without a carrier, cost savings and to avoid packing problems due to packing;
5, UASB equipped with three-phase separator, usually without sedimentation tank, the precipitation area separated from the sludge back to the sludge bed reaction zone, usually without sludge reflow equipment, running less power.

Conditions: 1, the influent pH = 6.0 ~ 8.0;
2, room temperature anaerobic temperature is preferably 20 ℃ ~ 25 ℃, moderate temperature anaerobic temperature should be 35 ℃ ~ 40 ℃, high temperature anaerobic temperature should be 50 ℃ ~ 55 ℃;
3, nutrition combination ratio (CODcr: ammonia nitrogen: phosphorus) should be 100 ~ 500: 5: 1;
4, B / C ratio should be 0.3;
5, water SS content <1500mg / L, ammonia concentration <2000mg / L; sulfate concentration <1000mg / L
6, influent CODcr> 1500mg / L, the highest can be up to 10000mg / L or more;
7, strict control of heavy metals, cyanide, phenols and other substances into the anaerobic reactor concentration.
If you can not meet the above requirements, you need to carry out the corresponding pretreatment measures.

Process Description: SBR is Sequencing Batch Reactor (Sequencing Batch Reactor) abbreviation, is a kind of intermittent aeration to run the activated sludge sewage treatment technology, also known as batch batch activated sludge method. Different from the traditional sewage treatment process, SBR technology uses time division of the operation mode instead of space division of the operation mode, non-stable biochemical reaction instead of steady-state biochemical reaction, standing ideal precipitation instead of the traditional dynamic precipitation. The earliest use by South American scientists in denitrification in 1970 caused environmentalists to note that since the 1980s, with the global shortage of water resources, the intensification of water pollution, and computer, automation, biotechnology And materials such as scientific development at home and abroad has attracted wide attention and research of a sewage treatment technology. As a kind of intermittent operation of the wastewater treatment process, its structure is simple, flexible mode of operation, the space is completely mixed, the time ideal to push the flow, and homogenization, early sinking, biodegradation, the final Shen and other functions in a pool, No sludge return system is required. With the deepening of sewage treatment research, SBR process improvement technology, new technology research, development and application has been rapid development, in which the development of improved SBR is particularly rapid, such as ICEAS process, CASS process, UNITANK process, and MSBR process.
The operating mode of the SBR process consists of five basic stages of water, reaction, precipitation, effluent and standby. From the beginning of the waste water to the end of the standby time counted as a cycle. In each cycle, all the processes are carried out in a reaction tank equipped with aeration or agitator. The pool is homogenized, the initial settling, biodegradation, secondary precipitation and other functions in a pool, no sludge return system The Especially for intermittent emissions and traffic changes in the larger occasions. This five procedures in a reaction pool in the operation process, repeated and repeated to achieve the purpose of continuous sewage treatment.

Basic process：

Process Description: Wastewater through the pump to the wastewater into the SBR reaction tank, while stirring in the water while mixing, until the water is complete, stop the water, the aeration process, the aeration reaction after the organic pollution Precipitation process, after the completion of the decontamination decanter external drainage, the discharge of water discharge, the lower part of the active sludge efflux, the reaction pool into the idle stage, waiting for the next cycle of wastewater treatment.

Technical characteristics: SBR process for the single pool intermittent water treatment process, in most cases (including industrial wastewater treatment), no need to set the regulation pool; SVI value is low, easy to precipitate sludge, under normal circumstances, does not produce sludge expansion The use of electric valves, liquid level meters, automatic timer and programmable logic controller and other automatic control instruments, may make the process of the process, To achieve full automation, and controlled by the central control room; operation and management properly, the treatment of water quality is better than continuous; deep pool deep, with the same BOD-SS load compared to other ways, smaller footprint; impact load , The ability to handle toxic or high concentrations of organic wastewater. details as follows:
1, the process is simple, low investment and operating costs;
2, the sludge activity is strong, the sludge mass concentration is high;
3, the water quality, water quality changes adaptability, organic removal rate is high;
4, static precipitation effect is good;
5, not prone to sludge expansion;
6, nitrogen and phosphorus removal effect is good.

Process Description: Catalytic wet oxidation technology (CWAO) is a certain temperature, pressure and the role of the catalyst, the air oxidation, so that the organic matter in sewage and ammonia were oxidized into CO2, H2O and N2 and other harmless substances, to clean the goal of. The most significant feature is the hydroxyl radicals as the main oxidant and organic matter reaction, the organic radicals generated in the reaction can continue to participate in the chain reaction of HO, or by generating organic peroxides, further oxidative decomposition reaction Until the degradation of the final product of CO2 and H2O, so as to achieve the purpose of oxidative decomposition of organic matter. Conventional organic pollutants treatment effect of up to 95% or more; for particularly difficult to degradation, select the appropriate catalyst, can achieve about 90% removal rate. Catalytic wet oxidation with high purification efficiency, simple process, small footprint and other characteristics, a wide range of industrial applications. It is suitable for various industries with high chemical oxygen demand (COD) or compounds (such as ammonia nitrogen, polycyclic aromatic hydrocarbons, carcinogenic substances BAP, etc.) containing biodegradable compounds such as coking, dyes, pesticides, printing and dyeing, petrochemical and other industries Organic wastewater.

Basic process：

Process flow：

Process Description: Wastewater is pressurized by a high-pressure feed pump and mixed with air from an air compressor. Heat is transferred to the heat exchanger and heat from the reactor to heat the heat and then into the secondary heat exchanger. Temperature, into the oxidation reactor.
The organic matter in the wastewater is oxidized and the heat released by the reaction keeps the temperature of the mixed liquid constant. The temperature of the liquid flowing out of the reactor is high and the pressure is high, cooled in the heat exchanger, and the heat recovered during the reaction is used for the preheating of most of the wastewater. After cooling the liquid through the pressure control valve step-down, the liquid separation in the separator gas, liquid two-phase.

Technical characteristics: 1, mild reaction conditions: compared with conventional WAO technology, CWAO technology requires the reaction temperature and reaction pressure is low;
2, high efficiency: CWAO technology can make most of the organic wastewater COD removal rate of 90% or more, and the effluent biodegradability can be greatly improved;
4, the device covers an area of small: compared with the traditional biochemical method, CWAO device covers an area of small, 80 m3 / d scale device covers an area of only 400 m2;
5, low energy consumption: CWAO device by the DCS integration and control, the process can be achieved self-heating, energy-saving effect is obvious;
6, wide range of applications: CWAO for coking, dyes, pesticides, printing and dyeing, petrochemical, leather and other industries containing high COD or biochemical degradation of compounds (such as ammonia, polycyclic aromatic hydrocarbons, carcinogenic substances BAP, etc.) Industrial organic wastewater.

Process Description: Biological aerated filter (biological aerated filter) referred to as BAF, is the late 80s in the early 90s in the ordinary biofilter on the basis of reference to the water filter technology and the development of a new biofilm wastewater treatment process , This process combines the traditional biofilm process and fast filter process operation characteristics, known as the third generation biofilm process. The basic principle includes four parts: 1, the filter in the reactor attached to the biofilm in the microbial oxidation decomposition; 2, filter and microbial film adsorption retention effect; 3, along the direction of the water flow to form the food chain classification predation ; 4, microbial membrane microenvironment of the denitrification.
Aeration biofilter is a reference to the design of wastewater treatment contact oxidation and water supply quick filter, biodegradation and adsorption filtration of the two processes combined in the same unit reactor. (Such as ceramsite, coke, quartz sand, activated carbon, etc.) as the carrier, in the filter inside the aeration, so that the surface of the filter material to grow a large number of biofilm, when the sewage flow through the use of The strong oxidative decomposition of the active microorganisms in the biofilm attached to the filter media and the smaller particle size of the filter material give full play to the biological metabolism of the microorganisms, the physical adsorption and interception of the biofilm and the filler, Along the flow direction of the food chain grading predation, to achieve efficient removal of pollutants, while the use of reactor aerobic, hypoxia area to achieve the function of nitrogen and phosphorus removal.

Basic process：

Process Description: Aeration biofilter filled with a high specific surface area of the filler material to provide microbial film growth of the carrier, the waste from the top down or from the bottom up through the filter layer, the lower part of the filter layer with a blast Gas, air and sewage reverse or in the same direction, so that the organic matter in the sewage and the surface of the biofilm biochemical reaction to be degraded, the filler at the same time play a physical blocking effect. Its outstanding feature is based on the strengthening of a level of biological oxidation and filtration combined to save the follow-up secondary sedimentation tank, to ensure the processing effect under the premise of simplifying the process, through the backwash regeneration to achieve the filter cycle run.

Technical characteristics: 1, with a high biological concentration and high organic load: microbial biomass per unit volume is much larger than the activated sludge in the microbial biomass (up to 10 ~ 15g / l), high concentrations of micro-biomass BAF volume load increases, at the same time, due to the distribution of the entire filter with a higher concentration of microorganisms, the organic load, hydraulic load changes as traditional activated sludge is so sensitive, and no sludge expansion problems. Thereby reducing the pool volume and floor space, so that infrastructure costs greatly reduced.
2, the process is simple, the water quality is good: due to the mechanical retention of the filter media and the filter surface of the micro-organisms and metabolic substances produced in the adsorption of the formation of sticky material, making the water SS is very low, generally not more than 10mg / L, Eliminating the need for secondary sinks, thereby reducing infrastructure costs. Due to periodic backwash, biofilm can be effectively updated, the performance of biofilm thinner, higher activity. Sometimes even if the biological treatment fails, in the short term its physical mechanism can still ensure high quality water. BAF treatment of water can not only meet the emission standards, while reusable and production.
3, oxygen transmission efficiency: aerated biofilter oxygen utilization rate of up to 20% to 30%, aeration significantly lower than the general biological treatment.
4, easy to hang film, start fast: BAF debugging time is short, generally only 7 to 12 days, and no need to inoculate the sludge, the use of natural film domestication. As the microbial growth in the rough porous media surface, the microbial is not easy to lose, so that its operation and management is simple. BAF in a short time without the use of the case can be closed to run, once the water and aeration, in a very short period of time to resume normal operation, this feature shows that the biological aerated filter is ideal for some areas of large water changes in sewage deal with.
5, stable operation, high degree of automation: BAF filter for the semi-closed or fully enclosed structures, the biochemical reaction by the external temperature is less affected, suitable for cold areas for sewage treatment; filter operation process through the backwash to remove the filter layer Interception of pollutants and shedding of biofilm, without secondary sedimentation tank, simplifying the process, the use of modular structure design, so that the operation and management more convenient. In addition, the aeration biofilter system can be on the water quality, water and dissolved oxygen concentration in the sewage on-line detection, and through the PLC control system to easily adjust the length of the aeration time to control the fan oxygen supply, to optimize the operation , PLC system on the filter for automatic backwash.
6, the effect of denitrification: through different functions of the filter pool or the same filter in the distribution of different functional areas, so that the filter in the carbon can be carried out at the same time nitrification and denitrification. The principle is through the two groups of filters or the same filter were artificially caused by aerobic, oxygen and biological environment, not only to remove the general organic matter and suspended solids, and has a good denitrification.
7, to reduce the sewage plant odor, no sludge expansion problem, no sludge backflow.
8, aeration bio-filter application of a wide range of its depth in the water treatment, micro-pollution sources of water treatment, refractory organic matter treatment, low-temperature sewage nitrification, low temperature micro-polluted water treatment has a very good, even irreplaceable Features.

Process Description: MBR, also known as membrane bioreactor (Membrane Bio-Reactor), is a membrane separation unit and biological treatment unit combined with the new water treatment technology. According to the structure of the membrane can be divided into flat film, tubular film and hollow fiber membrane, membrane diameter can be divided into ultrafiltration membrane, microfiltration membrane, nanofiltration membrane, reverse osmosis membrane. MBR sewage treatment is a common way of modern sewage treatment, it uses membrane separation equipment will be biochemical reaction tank in the activated sludge and macromolecular organic matter interception, eliminating the traditional process of secondary sedimentation tank, you can efficiently carry out solid Liquid separation, get direct use of stable water. But also in the biological pool to maintain a high concentration of microbial biomass, and strengthen the function of the bioreactor, the process of residual sludge less, very effective to remove ammonia nitrogen, effluent suspended solids and turbidity close to zero, bacteria and viruses in the water (HRT) and sludge residence time (SRT) can be controlled separately to maintain a high degradation effect. 70 years in the United States, Japan, South Africa and Europe, many countries have begun to membrane bioreactor for sewage and wastewater treatment research. The water source from the domestic sewage (such as shower drainage, toilet drainage, laundry drainage, kitchen drainage, toilet drainage, etc.) and cooling water, after years of development and use, is now ripe for municipal wastewater and industrial wastewater treatment and Water reuse.

Basic process：

Process brief: Wastewater after adjusting the pool of uniform water quality, through the lift pump into the anoxic tank, in the hypoxic tank for denitrification and COD degradation, after treatment into the membrane biological wastewater into the membrane reactor, in the membrane bioreactor, Under the aeration effect, the aerobic microorganisms carry out the degradation of organic pollutants and nitration and deamination, after the degradation of the wastewater film components suction, into the water reuse pool, the water reuse, and activated sludge and other bacteria The micelles are trapped in the reaction tank, continue to degrade organic microorganisms in the wastewater, and the excess part of the activated sludge flows back to the anoxic tank and the other part of the effluent.

Technical characteristics: 1, the quality of water quality and stability: due to the efficient separation of the membrane, the separation effect is much better than the traditional sedimentation tank, the treatment of water is extremely clear, suspended solids and turbidity close to zero, bacteria and viruses were significantly removed, (CJ25.1-89) issued by the Ministry of Construction, can be directly used as non-drinking municipal miscellaneous water for reuse. At the same time on the water load (water quality and water) of the various changes have a good adaptability, impact load, can be stable access to high quality water quality.
2, the remaining sludge production: the process can be high-volume load, low sludge load operation, the remaining sludge production is low (theoretically can achieve zero sludge emissions), reducing the sludge treatment costs.
3, compact equipment, small footprint, not limited by the set of occasions: the bioreactor will increase the sludge concentration of 2 to 5 times the volume load can be greatly improved, and the membrane module instead of the secondary sedimentation tank and filtration equipment , Therefore, the area can be greatly reduced; the process is simple, compact, covers an area, not limited by the installation site, suitable for any occasion, can be made of ground, semi-underground and underground.
4, can remove ammonia and refractory organic matter: the microbial is completely shut down in the bioreactor, which is conducive to slow growth of microorganisms such as nitrifying bacteria retention growth, the system nitrification efficiency can be improved. At the same time, can increase the number of refractory organic matter in the system of hydraulic retention time, is conducive to the degradation of organic matter degradation efficiency.
5, easy operation and management, easy to achieve automatic control: the process to achieve the hydraulic retention time (HRT) and sludge residence time (SRT) completely separate, more flexible operation and stability, is easy to achieve the sewage treatment of new technology , Can achieve automatic computer control, so that the operation and management more convenient.
6, easy to transform from the traditional process: the process can be used as a traditional sewage treatment process of the depth of processing units in the city two sewage treatment plant effluent depth treatment (in order to achieve a large number of urban sewage reuse) and other fields have a broad application prospects.
7, sludge age can stay up to 30d; solid, liquid separation to achieve the integration;

Introduction to the process
In this paper, the combination process of pretreatment and membrane treatment was developed, and the removal rate of suspended solids and oil in fractured backflow was over 99%.

Technical characteristics：

Removal efficiency: pretreatment + combined membrane technology to achieve suspended solids and oil removal rate of 99% or more
Personalized solutions: tailored for reentry, reuse, inline and other target requirements
High degree of automation: easy operation of the equipment operator configuration less
Modular equipment: small footprint, flexible and fast assembly
Low investment and low operating costs

Process flow

Introduction to the process
Alkali residue wastewater is a kind of alkaline wastewater which contains a large amount of phenolic, sulfide, oil, naphthenic acid, sodium thiolate, free NaOH, Na2S, NaHS and so on which is produced in the process of petroleum alkali washing. It has high COD, N, high pH, high SS, polysulfide, large odor, deep color, difficult to deal with and so on.
In view of the characteristics and difficulties of alkali residue wastewater treatment, the pretreatment and low temperature catalytic oxidation combined process were used. The COD removal rate of alkali residue wastewater was over 99%.

Technical characteristics：

Low energy consumption, mild reaction conditions, low temperature, atmospheric pressure conditions
Applicable to a wide range of pollution factors, to overcome the traditional technology of organic selective removal of the problem, almost all of the degradation of organic matter
COD removal efficiency is good, the degree of mineralization is high, the product is inorganic ions, CO2 and H2O
Equipment is simple, easy to operate, can be made skid-mounted mobile devices, and to achieve full automation and stable transport

Process flow

Technical Description：

Alkali residue waste water by acid to a certain pH value, through the oil recovery equipment recovery of oil in the oil;
After pretreatment of alkali residue wastewater pretreatment to remove part of the COD and improve the COD can be removed, pretreatment wastewater into the low temperature catalytic oxidation system;
After the catalytic oxidation technology, the degradation rate of organic matter in alkali residue wastewater is more than 99%, and the volatile phenol and sulfide are reduced to below 30 mg / L.
And then by the Division I ammonia system treatment, alkali residue wastewater ammonia nitrogen reduced to below 30mg / L, to meet the requirements of the tube.
Custom processing standards can be tailored to customer goals