CN102452751B - Method of deep desalting and recycling of industrial effluent - Google Patents
Method of deep desalting and recycling of industrial effluent Download PDFInfo
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- CN102452751B CN102452751B CN201010515220XA CN201010515220A CN102452751B CN 102452751 B CN102452751 B CN 102452751B CN 201010515220X A CN201010515220X A CN 201010515220XA CN 201010515220 A CN201010515220 A CN 201010515220A CN 102452751 B CN102452751 B CN 102452751B
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Abstract
The invention provides a method of deep desalting and recycling of industrial effluent. The method is characterized in that industrial effluent to be treated is treated with a hardness reducing operating unit, an efficient filtering operating unit and an electro-adsorption desalting operating unit to reach a standard of recycling water. The method comprises specific steps of: a. hardness reduction, precipitation and neutralization; b. efficient filtering; and c. electro-adsorption desalting. The provided method of deep desalting and recycling of industrial effluent requires no equipment of electroosmosis or reverse osmosis membrane, or ion exchange resin, keeps stable operation of the system under a condition of water quality conductivity higher than 2500 muS / cm and does not scale; and an outlet water quality satisfies water quality requirements on recycling water replenishment. Discharge secondary industrial effluent with water quality conductivity lower than 4500 muS /cm can be treated to reach water replenishment requirements of an industrial recycling water system. The method is suitable for chemical effluent, printing and dyeing effluent, spinning effluent and oil refining effluent and has wide water quality scope of application, stable technology operation and high desalting efficiency.
Description
Technical field
The present invention is a kind of trade effluent deep desalting reuse method.The multiple-stage treatment that belongs to water, waste water or sewage.
Background technology
Worldwide shortage of water resources is greatly paid attention to sustainable utilization of water resource and water saving reuse, and reusing sewage not only can be saved a large amount of fresh waters, and can significantly reduce wastewater disposition.The contaminated degree of trade effluent is larger, developed country generally with trade effluent in the production scene through simple process, the urban sewage treatment system that enters very well equipped with process after sanitary sewage mixes, independent reuse is actually rare in industrially developed country.Trade effluent desalination Treatment for Reuse flow process is than municipal sewage treatment long flow path, generally adopts secondary biochemical treatment-filtration-charcoal absorption-reverse osmosis-be back to flow process of production.The recirculated cooling water moisturizing is done in domestic outer draining reuse after flocculation sediment, filtration and germicidal treatment after having refinery that second-stage treatment is up to standard.Find through investigation, can adopt this technique for soft, low-corrosiveness, hyposaline sewage, but for the higher trade effluent of salts contg, when advanced treatment and reclamation, must remove the part inorganic salt, could satisfy the requirement of reuse water.Domestic, external desalination mode commonly used mainly contains at present: electrodialysis, reverse osmosis and ion exchange method.The easy fouling of electroosmose process, floor space is larger, is mainly used at present groundwater treatment, is used for the waste water treating and reutilizing aspect and yet there are no report.Reverse osmosis membrane requires very strict to influent quality, although desalination is comparatively thorough, film vulnerable to pollution, energy consumption are higher.Ion exchange method is more commonly used, is mainly used in clean water treatment, but to consume a large amount of acid, alkali carries out manipulation of regeneration; Ion exchange resin also is subject to the water Organic pollutants.Chinese patent 200520087169.1 discloses a kind of sewage water recycling and processing equipment.This patent adopts the electro-adsorption method to remove salt, partial organic substances in the sewage of biochemical treatment.The water quality that this device is fit to is that specific conductivity is less than 2500 μ S/cm.When specific conductivity greater than 2500 μ S/cm, obvious scaling tendency will appear in system, causes frequently matting of system's fluctuation of service, needs, simultaneously effluent quality also is difficult to satisfy the circulating cooling make-up water water quality requirement.
In sum, for the outer draining that arrives emission standard after secondary biochemical treatment, further desalination reaches the reuse water standard, also has following technical problem in the prior art:
1. the easy fouling of electroosmose process, floor space is larger, is mainly used at present groundwater treatment, is used for the waste water treating and reutilizing aspect and yet there are no report.
2. reverse osmosis membrane requires very strictly to influent quality, although desalination is comparatively thorough, film vulnerable to pollution, energy consumption are higher.
3. ion exchange resin also is subject to the water Organic pollutants.
4. the electro-adsorption method is removed salt, is only applicable to water electric conductivity less than 2500 μ S/cm.When specific conductivity greater than 2500 μ S/cm, obvious scaling tendency will appear in system, causes frequently matting of system's fluctuation of service, needs, simultaneously effluent quality also is difficult to satisfy the circulating cooling make-up water water quality requirement.
Summary of the invention
The object of the invention is to avoid the weak point of above-mentioned existing skill in this, and provide a kind of electrodialysis, reverse osmosis membrane apparatus of neither needing, also need not ion exchange resin, and under the condition of water electric conductivity greater than 2500 μ S/cm, keep system run all right, non-scaling, effluent quality can satisfy the trade effluent deep desalting reuse method of circulating cooling make-up water water quality requirement simultaneously.
Purpose of the present invention can reach by following measure:
Trade effluent deep desalting reuse method of the present invention, it is characterized in that pending trade effluent is sequentially through after reducing hardness operating unit, high efficiency filter operating unit and the processing of electro-adsorption demineralization operating unit, namely reach the reuse water standard, concrete treatment step is as follows:
A. reduce hardness, precipitation, neutralization
Specific conductivity is less than 4500 μ S/cm, enter described reduction hardness operating unit in the calcium carbonate total hardness greater than the pending trade effluent of 350mg/L, add alkaline matter regulation system pH, stir lower, behind hybrid reaction 0.5～30min, precipitation and disgorging, 1～8 hour settling time, regulate pH between 5.0～9.0 with acidic substance again, for entering described high efficiency filter operating unit;
B. high efficiency filter
Trade effluent from after the step a processing enters the high efficiency filter operating unit, through high efficiency filter, further removes suspended substance wherein, for entering described electro-adsorption demineralization operating unit;
C. electro-adsorption demineralization
Trade effluent behind step b high efficiency filter, enter described electro-adsorption demineralization operating unit, the mould of electro-adsorption module is to operating voltage 1.0～1.8V, desalination working hour 20～100min, regeneration backwash time 20～100min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
The main purpose that reduces the hardness operating unit is set prevents that the hardness ions in the sewage from becoming dirt in follow-up desalination is processed, affect the continuous and steady operation of desalting system.To reduce the suspended substance of hardness operating unit product water and further process in the high efficiency filter unit, main purpose is to eliminate suspended substance to the impact of desalting system continuous and steady operation.In the electro-adsorption demineralization unit high efficiency filter unit is produced water and carry out the desalination processing, purpose is that part is removed the zwitterion in the water, makes it to reach the circulating cooling make-up water water quality requirement.Electro-adsorption demineralization is the phenomenon of utilizing charging electrode surface adsorption water intermediate ion and electrically charged particle, makes in the water dissolved salts and other charged contaminants concentrated and realize partially desalted a kind of new type water treatment technology in the electrode surface enrichment.This technology has the influent quality requirement low, and is stable, energy consumption is low, long service life, maintenance of the equipment simply, do not produce the characteristics such as secondary pollution.
More than three operating unit cooperation, jointly finished task of the present invention.
Purpose of the present invention can also reach by following measure:
Trade effluent deep desalting reuse method of the present invention, reduce described in the step a. in hardness, precipitation, the neutralization operation unit, add alkaline matter regulation system pH between 7.0～12.0, hybrid reaction 0.5～30min, 1～8 hour throw out settling time, acidic substance are regulated pH between 5.0～9.0, then high efficiency filter.
Trade effluent deep desalting reuse method of the present invention, reduce described in the step a. in hardness, precipitation, the neutralization operation unit, add alkaline matter regulation system pH between 8.5～11.5, hybrid reaction 5～10min, 3～5 hours throw out settling times, acidic substance are regulated pH between 6.0～7.5, then high efficiency filter.
Trade effluent deep desalting reuse method of the present invention, alkaline matter described in the step a. is any one in sodium hydroxide, lime, the calcium hydroxide; Described acidic substance are sulfuric acid or hydrochloric acid.
Trade effluent deep desalting reuse method of the present invention, under stirring described in the step a., hybrid reaction, any one in air blast stirring, mechanical stirring or the pipeline alr mode adopted in stirring; The coprecipitation mode of disgorging is any one or its any two or more combinations in natural sedimentation, inclined plate sedimentation, the flocculating settling.
Trade effluent deep desalting reuse method of the present invention, in the operating unit of high efficiency filter described in the step b., the filter type of employing is any one in sand filtration, fiber filter, micro-filtration, the ultrafiltration.
Trade effluent deep desalting reuse method of the present invention in the operating unit of high efficiency filter described in the step b., adds flocculation agent or electrolysis and produces flocculation agent, and the flocculant concentration weight range is 0～50ppm, and the flocculation reaction time is 0.5～30min, then high efficiency filter.
Trade effluent deep desalting reuse method of the present invention in the operating unit of high efficiency filter described in the step b., adds flocculation agent or electrolysis and produces flocculation agent, and the flocculant concentration weight range is 0～30ppm, and the flocculation reaction time is 5～20min, then high efficiency filter.
Trade effluent deep desalting reuse method of the present invention, in the operating unit of high efficiency filter described in the step b., the sterilant that adds, its dosage are 0～20ppm.
Trade effluent deep desalting reuse method of the present invention, sterilant described in the step b. is any one in chlorine, dioxide peroxide, clorox, the ozone, its dosage is 0～10ppm.
Trade effluent deep desalting reuse method of the present invention, the operating unit of electro-adsorption demineralization described in the step c, its module operation scheme is the array configuration of the above series, parallel of single-stage, two-stage or series and parallel.
Trade effluent deep desalting reuse method of the present invention, in the described electro-adsorption demineralization operating unit of step c, the mould of electro-adsorption module is to operating voltage 1.0～1.8V, desalination working hour 20～100min, regeneration backwash time 20～100min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
Trade effluent deep desalting reuse method of the present invention, in the described electro-adsorption demineralization operating unit of step c, the mould of electro-adsorption module is to operating voltage 1.2～1.6V, desalination working hour 30～60min, regeneration backwash time 30～60min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
Trade effluent deep desalting reuse method of the present invention is characterized in that described concrete treatment step is as follows:
A. reduce hardness, precipitation, neutralization
Specific conductivity is less than 4500 μ S/cm, enter described reduction hardness operating unit in the calcium carbonate total hardness greater than the pending trade effluent of 350mg/L, add alkaline matter regulation system pH between 8.5～11.5, stir lower, behind hybrid reaction 5～10min, precipitation and disgorging, 3～5 hours settling times, regulate pH between 6.0～7.5 with acidic substance again, for entering described high efficiency filter operating unit;
B. high efficiency filter
Trade effluent from after the step a processing enters the high efficiency filter operating unit, through high efficiency filter, further removes suspended substance wherein, for entering described electro-adsorption demineralization operating unit;
C. electro-adsorption demineralization
Trade effluent behind step b high efficiency filter, enter described electro-adsorption demineralization operating unit, the mould of electro-adsorption module is to operating voltage 1.2～1.6V, desalination working hour 30～60min, regeneration backwash time 30～60min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
The disclosed technical scheme of trade effluent deep desalting reuse method of the present invention has following positively effect compared to existing technology:
1. a kind of electrodialysis, reverse osmosis membrane apparatus of neither needing is provided, also need not ion exchange resin, and under the condition of water electric conductivity greater than 2500 μ S/cm, keep system run all right, non-scaling, effluent quality can satisfy the trade effluent deep desalting reuse method of circulating cooling make-up water water quality requirement simultaneously.
2. avoided the easy fouling of electroosmose process, the drawback that floor space is larger.
3. avoided reverse osmosis membrane very strict to the influent quality requirement, film vulnerable to pollution, the deficiency that energy consumption is higher.
4. avoided ion exchange resin to be subject to the problem of water Organic pollutants.
5. solve electro-adsorption method of the prior art and removed salt, be only applicable to water electric conductivity less than 2500 μ S/cm.When specific conductivity greater than 2500 μ S/cm, obvious scaling tendency will appear in system, causes frequently matting of system's fluctuation of service, needs, simultaneously effluent quality also is difficult to satisfy the technical problem of circulating cooling make-up water water quality requirement.
6. can efflux Industrial Wastewater Treatment to the moisturizing requirement of industrial circulating water system with what reach behind the secondary biochemical that national grade one discharge standard, specific conductivity be lower than 4500 μ S/cm.This technique can be applicable to chemical engineering sewage, dyeing and printing sewage, textile sewage and oil refining sewerage, has the advantages that applicable water quality wide ranges, process operation are stable, desalting efficiency is high.
Description of drawings
Fig. 1 is trade effluent deep desalting reuse method process flow diagram of the present invention
Among the figure:
The 1-trade effluent
2-alkali
3-reduces the hardness operating unit
4-acid
The 5-neutralization tank
6-high efficiency filter operating unit
7-electro-adsorption demineralization operating unit
The 8-Process for Effluent.
Embodiment
The present invention will now be further detailed embodiment:
Embodiment 1
Adopt technical scheme of the present invention to process trade effluent, influent quality is specific conductivity 2800 μ S/cm, in the hardness 900mg/L of calcium carbonate; Reducing hardness alkaline matter that the unit adds is sodium hydroxide, the pH value is controlled at 10.5, the time range of hybrid reaction is 20min, the throw out removing method that produces is inclined plate sedimentation, and the settling time scope is 4 hours, and the acidic substance that neutralization reaction adds are sulfuric acid, the pH value is controlled at 6.8, the time of neutralization reaction is 10min, and reducing hardness unit effluent quality is specific conductivity 2600 μ S/cm, hardness 220mg/L (in calcium carbonate); High efficiency filter unit filter type is sand filtration, does not add flocculation agent or sterilant; The module operation scheme is two-stage series connection in the electro-adsorption demineralization unit, and it is 1.55V that every pair of electrode adds piezoelectric voltage, working hour 35min, and backwash time 35min, producing water water quality is specific conductivity 800 μ S/cm, in the hardness 80mg/L of calcium carbonate.
Embodiment 2
Adopt technical scheme of the present invention to process trade effluent, influent quality is specific conductivity 4000 μ S/cm, in the hardness 1100mg/L of calcium carbonate; Reducing hardness alkaline matter that the unit adds is sodium hydroxide, the pH value is controlled at 10.8, the time range of hybrid reaction is 20min, the throw out removing method that produces is inclined plate sedimentation, and the settling time scope is 4 hours, and the acidic substance that neutralization reaction adds are sulfuric acid, the pH value is controlled at 6.5, the time of neutralization reaction is 10min, and reducing hardness unit effluent quality is specific conductivity 3700 μ S/cm, in the hardness 250mg/L of calcium carbonate; High efficiency filter unit filter type is sand filtration, does not add flocculation agent or sterilant; The module operation scheme is two-stage series connection in the electro-adsorption demineralization unit, and it is 1.60V that every pair of electrode adds piezoelectric voltage, working hour 30min, and backwash time 30min, producing water water quality is specific conductivity 1000 μ S/cm, in the hardness 100mg/L of calcium carbonate.
Embodiment 3
Adopt technical scheme of the present invention to process trade effluent, influent quality is specific conductivity 3200 μ S/cm, in the hardness 600mg/L of calcium carbonate; Reducing hardness alkaline matter that the unit adds is sodium hydroxide, the pH value is controlled at 10.2, the time range of hybrid reaction is 20min, the throw out removing method that produces is inclined plate sedimentation, and the settling time scope is 4 hours, and the acidic substance that neutralization reaction adds are sulfuric acid, the pH value is controlled at 6.6, the time of neutralization reaction is 10min, and reducing hardness unit effluent quality is specific conductivity 3100 μ S/cm, in the hardness 230mg/L of calcium carbonate; High efficiency filter unit filter type is sand filtration, does not add flocculation agent or sterilant; The module operation scheme is two-stage series connection in the electro-adsorption demineralization unit, and it is 1.55V that every pair of electrode adds piezoelectric voltage, working hour 30min, and backwash time 30min, producing water water quality is specific conductivity 900 μ S/cm, in the hardness 90mg/L of calcium carbonate.
Embodiment 4
Adopt technical scheme of the present invention to dispose of sewage and process a sewage up to standard, influent quality is specific conductivity 4400 μ S/cm, in the hardness 750mg/L of calcium carbonate; Reducing hardness alkaline matter that the unit adds is sodium hydroxide, the pH value is controlled at 10.2, the time range of hybrid reaction is 20min, the throw out removing method that produces is inclined plate sedimentation, and the settling time scope is 4 hours, and the acidic substance that neutralization reaction adds are sulfuric acid, the pH value is controlled at 6.5, the time of neutralization reaction is 10min, and reducing hardness unit effluent quality is specific conductivity 4200 μ S/cm, in the hardness 200mg/L of calcium carbonate; High efficiency filter unit filter type is sand filtration, does not add flocculation agent or sterilant; The module operation scheme is two-stage series connection in the electro-adsorption demineralization unit, and it is 1.60V that every pair of electrode adds piezoelectric voltage, working hour 30min, and backwash time 30min, producing water water quality is specific conductivity 1100 μ S/cm, in the hardness 80mg/L of calcium carbonate.
Embodiment 5
Adopt technical scheme of the present invention to dispose of sewage and process a sewage up to standard, influent quality is specific conductivity 3800 μ S/cm, in the hardness 1000mg/L of calcium carbonate; Reducing hardness alkaline matter that the unit adds is sodium hydroxide, the pH value is controlled at 10.8, the time range of hybrid reaction is 20min, the throw out removing method that produces is inclined plate sedimentation, and the settling time scope is 4 hours, and the acidic substance that neutralization reaction adds are sulfuric acid, the pH value is controlled at 6.5, the time of neutralization reaction is 10min, and reducing hardness unit effluent quality is specific conductivity 3500 μ S/cm, in the hardness 180mg/L of calcium carbonate; High efficiency filter unit filter type is sand filtration, does not add flocculation agent or sterilant; The module operation scheme is two-stage series connection in the electro-adsorption demineralization unit, and it is 1.55V that every pair of electrode adds piezoelectric voltage, working hour 30min, and backwash time 30min, producing water water quality is specific conductivity 1000 μ S/cm, in the hardness 70mg/L of calcium carbonate.
Embodiment 6
Adopt technical scheme of the present invention to dispose of sewage and process a sewage up to standard, influent quality is specific conductivity 3000 μ S/cm, in the hardness 600mg/L of calcium carbonate; Reducing hardness alkaline matter that the unit adds is sodium hydroxide, the pH value is controlled at 10.5, the time range of hybrid reaction is 20min, the throw out removing method that produces is inclined plate sedimentation, and the settling time scope is 4 hours, and the acidic substance that neutralization reaction adds are sulfuric acid, the pH value is controlled at 6.6, the time of neutralization reaction is 10min, and reducing hardness unit effluent quality is specific conductivity 2850 μ S/cm, in the hardness 200mg/L of calcium carbonate; High efficiency filter unit filter type is sand filtration, does not add flocculation agent or sterilant; The module operation scheme is two-stage series connection in the electro-adsorption demineralization unit, and it is 1.55V that every pair of electrode adds piezoelectric voltage, working hour 35min, and backwash time 35min, producing water water quality is specific conductivity 800 μ S/cm, in the hardness 90mg/L of calcium carbonate.
Claims (13)
1. a trade effluent deep desalting reuse method is characterized in that pending trade effluent sequentially through after reducing hardness operating unit, high efficiency filter operating unit and the processing of electro-adsorption demineralization operating unit, namely reaches the reuse water standard, and concrete treatment step is as follows:
A. reduce hardness, precipitation, neutralization
Specific conductivity is less than 4500 μ S/cm, enter described reduction hardness operating unit in the calcium carbonate total hardness greater than the pending trade effluent of 350mg/L, add alkaline matter regulation system pH, stir lower, behind hybrid reaction 0.5～30min, precipitation and disgorging, 1～8 hour settling time, regulate pH between 5.0～9.0 with acidic substance again, for entering described high efficiency filter operating unit;
B. high efficiency filter
Trade effluent from after the step a processing enters the high efficiency filter operating unit, through high efficiency filter, further removes suspended substance wherein, for entering described electro-adsorption demineralization operating unit;
C. electro-adsorption demineralization
Trade effluent behind step b high efficiency filter, enter described electro-adsorption demineralization operating unit, the mould of electro-adsorption module is to operating voltage 1.0～1.8V, desalination working hour 20～100min, regeneration backwash time 20～100min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
2. according to claim 1 trade effluent deep desalting reuse method, it is characterized in that reducing in hardness, precipitation, the neutralization procedure described in the step a., add alkaline matter regulation system pH between 7.0～12.0, hybrid reaction 0.5～30min, 1～8 hour throw out settling time, acidic substance are regulated pH between 5.0～9.0, then high efficiency filter.
3. according to claim 1 trade effluent deep desalting reuse method, it is characterized in that reducing in hardness, precipitation, the neutralization procedure described in the step a., add alkaline matter regulation system pH between 8.5～11.5, hybrid reaction 5～10min, 3～5 hours throw out settling times, acidic substance are regulated pH between 6.0～7.5, then high efficiency filter.
4. according to claim 1 trade effluent deep desalting reuse method is characterized in that alkaline matter described in the step a. is any one in sodium hydroxide, lime, the calcium hydroxide; Described acidic substance are sulfuric acid or hydrochloric acid.
5. according to claim 1 trade effluent deep desalting reuse method is characterized in that stirring described in the step a. lower, and hybrid reaction stirs and adopts in air blast stirring, mechanical stirring or the pipeline alr mode any one; The coprecipitation mode of disgorging is any one or its any two or more combinations in natural sedimentation, inclined plate sedimentation, the flocculating settling.
6. according to claim 1 trade effluent deep desalting reuse method is characterized in that described in the step b. that in the high efficiency filter operating unit, the filter type of employing is any one in sand filtration, fiber filter, micro-filtration, the ultrafiltration.
7. according to claim 1 trade effluent deep desalting reuse method, it is characterized in that described in the step b. in the high efficiency filter operating unit that add flocculation agent or electrolysis and produce flocculation agent, the flocculant concentration weight range is 0～50ppm, the flocculation reaction time is 0.5～30min, then high efficiency filter.
8. according to claim 1 trade effluent deep desalting reuse method, it is characterized in that described in the step b. in the high efficiency filter operating unit that add flocculation agent or electrolysis and produce flocculation agent, the flocculant concentration weight range is 0～30ppm, the flocculation reaction time is 5～20min, then high efficiency filter.
9. according to claim 1 trade effluent deep desalting reuse method is characterized in that described in the step b. that in the high efficiency filter operating unit, the sterilant that adds, its dosage are 0～20ppm.
10. according to claim 9 trade effluent deep desalting reuse method is characterized in that sterilant described in the step b. is any one in chlorine, dioxide peroxide, clorox, the ozone, and its dosage is 0～10ppm.
11. trade effluent deep desalting reuse method according to claim 1 is characterized in that the operating unit of electro-adsorption demineralization described in the step c, its module operation scheme is the array configuration of the above series, parallel of single-stage, two-stage or series and parallel.
12. trade effluent deep desalting reuse method according to claim 1, it is characterized in that in the described electro-adsorption demineralization operating unit of step c, the mould of electro-adsorption module is to operating voltage 1.2～1.6V, desalination working hour 30～60min, regeneration backwash time 30～60min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
13. trade effluent deep desalting reuse method according to claim 1 is characterized in that described concrete treatment step is as follows:
A. reduce hardness, precipitation, neutralization
Specific conductivity is less than 4500 μ S/cm, enter described reduction hardness operating unit in the calcium carbonate total hardness greater than the pending trade effluent of 350mg/L, add alkaline matter regulation system pH between 8.5～11.5, stir lower, behind hybrid reaction 5～10min, precipitation and disgorging, 3～5 hours settling times, regulate pH between 6.0～7.5 with acidic substance again, for entering described high efficiency filter operating unit;
B. high efficiency filter
Trade effluent from after the step a processing enters the high efficiency filter operating unit, through high efficiency filter, further removes suspended substance wherein, for entering described electro-adsorption demineralization operating unit;
C. electro-adsorption demineralization
Trade effluent behind step b high efficiency filter, enter described electro-adsorption demineralization operating unit, the mould of electro-adsorption module is to operating voltage 1.2～1.6V, desalination working hour 30～60min, regeneration backwash time 30～60min after product water reaches the reuse water quality standard, discharges treatment system, for backwater, regeneration sewer qualified discharge.
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| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
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| ES2261595T3 (en) * | 2002-01-31 | 2006-11-16 | Ford Global Technologies, Llc. | PROCEDURE FOR THE TREATMENT OF INDUSTRIAL WASTEWATER. |
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| CN201343455Y (en) * | 2008-12-25 | 2009-11-11 | 广东新大禹环境工程有限公司 | Wastewater treatment system with metallic ion |
| CN101781042A (en) * | 2010-01-29 | 2010-07-21 | 中国科学院地球化学研究所 | Method for treating antimony-containing industrial waste water through iron electrode-electroflocculation process |
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| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
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