CN104370394A - Surface water desalting apparatus by-producing saline waste water treatment method - Google Patents

Surface water desalting apparatus by-producing saline waste water treatment method Download PDF

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CN104370394A
CN104370394A CN201310356062.1A CN201310356062A CN104370394A CN 104370394 A CN104370394 A CN 104370394A CN 201310356062 A CN201310356062 A CN 201310356062A CN 104370394 A CN104370394 A CN 104370394A
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electrodialysis
water
treatment
desalting apparatus
waste water
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CN104370394B (en
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任庆春
任子俊
汪锰
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BEIJING LINISPLENDOUR EMPYRERL ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
Ocean University of China
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BEIJING LINISPLENDOUR EMPYRERL ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
Ocean University of China
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Abstract

The present invention provides a surface water desalting apparatus by-producing saline waste water treatment method. According to the surface water desalting apparatus by-producing saline waste water treatment method, saline waste water is pretreated by adopting a pure alkali-caustic soda-flocculation precipitation method to remove hard, reduce silicon and remove organic matters, and then a bipolar membrane electrodialysis device filled with a monovalent selective ion exchange membrane is adopted to carry out a resource treatment to convert the salt in the saline waste water into the corresponding acid and the corresponding alkali, wherein the acid and the alkali obtained from the electrodialysis can be used for the regeneration and pretreatment process of the desalting apparatus ion exchange resin, and the diluted saline water obtained from the electrodialysis can be used as the influent of the desalting apparatus. The method has characteristics of high treatment capacity, low treatment cost and significant reduction of the water consumption of the desalting apparatus, and is suitable for industrialization.

Description

A kind for the treatment of process of surface water desalting plant by-product brine waste
Technical field
The present invention relates to wastewater treatment and field of comprehensive utilization, particularly relate to a kind for the treatment of process of surface water desalination by-product brine waste.
Background technology
Along with raising and the industrial development of living standards of the people, the demand of Freshwater resources grows with each passing day.Wherein, surface water desalination has become one of important fresh water sources.But no matter adopt embrane method, Re Fa or ion exchange method to desalinate surface water, by-product brine waste will be all inevitable.As everyone knows, the direct outer row of high-salt wastewater not only can cause that soil compaction, water body salinization, farm crop are impaired, the deterioration of the ecological environment, and wastes the relevant input such as water intaking and process of surface water desalination, increases water producing cost.
Therefore, the resource utilization realizing brine waste is one of current problem demanding prompt solution.By-product high-salt wastewater output is reduced by the Water Sproading rate and electrodialytic rich-lean ratio that increase reverse osmosis, then gained height strong brine is directly used in chlorine industry or by crystallization salt manufacturing, but the energy consumption of this method is higher and harsh to the supporting requirement of subsequent disposal, causes application limited.
In prior art, salt-containing waste water treatment method adopts conventional bipolar EDBM method usually.American Badruzzaman(Journal of Membrane Science326 (2009) 392) utilize the brine waste of conventional bipolar membrane electrodialysis process process reverse osmosis surface water desalination by-product, the method carries out pre-treatment with ion-exchange to high-salt wastewater, processes and resource utilization high-salt wastewater with intermittent type bipolar membrane electrodialysis; The method adopts perseverance (electricity) flow operation of small electric flow density, and the concentration of gained bronsted lowry acids and bases bronsted lowry is less than 0.2mol/L.Being not difficult to find out, there is following technological deficiency in aforesaid method: (1) preprocessing process cost is high, and resin frequent regeneration needs the bronsted lowry acids and bases bronsted lowry of higher concentration, has environmental pollution hidden danger; (2) perseverance (electricity) flow operation of step treatment process and small electric flow density is difficult to be applied to scale operation reality; (3) ratio of desalinization of brine waste is lower, can not direct reuse or discharge, and the bronsted lowry acids and bases bronsted lowry concentration obtained is lower, and reuse is worth limited.
Summary of the invention
The salt-containing waste water treatment method that the surface water desalination that the invention provides a kind of applicable commercial scale production produces.The method overcome the difficult problems such as processing cost in prior art is high, processing power is low; Not only become give up (salt) into precious (acid, alkali), and processed waste water can turn back to desalinating process, reduces desalinating process water consumption and comprehensive water producing cost, avoids high-salt wastewater in line and the environmental pollution of initiation, realizes brine waste resource utilization.The treatment process of brine waste of the present invention is achieved in that
A treatment process for surface water desalting plant by-product brine waste, the method comprises the following steps successively:
A. pre-treatment, first with soda ash and/or sodium hydroxide for precipitation agent, adopt fluidization grain ball reactor to carry out decalcification process to described brine waste; Then add flocculation agent, adjust ph to 10 ~ 11, flocculation sediment removes the hardness of described brine waste, silicon and organism;
B. electrodialysis process, carries out bipolar membrane electrodialysis process to described pretreated water outlet; Salt in described water outlet is converted into bronsted lowry acids and bases bronsted lowry by described electrodialysis process, and the light salt brine that described electrodialysis process obtains returns described desalting plant.
In the specific implementation, the desalting method that described desalting plant adopts is: reverse osmosis method, electroosmose process, ion exchange method or hot method.
In the specific implementation, described in step a during decalcification, the filler of described fluidization grain ball reactor is pomegranate stone sand, and its particle diameter is 100 μm-300 μm; Be 1:5-1:4 without the pack height of the described filler under mobility status and the ratio of reactor, reactor length-to-diameter ratio is 80:1-120:1.Described in step a during flocculation sediment, first in described decalcification process water outlet, add flocculation agent and coagulant aids, then add sodium hydroxide adjust ph to 10.5 ~ 11; Described flocculation agent is aluminum chloride, polymerize aluminum chloride or aluminium iron sulfate, and described coagulant aids is cationic or non-ionic polyacrylamide.
In the specific implementation, in step b, described bipolar membrane electrodialysis is three-chamber type, is followed successively by feed liquid room, sour room and alkali room; The cationic exchange membrane adopted and anion-exchange membrane are Monovalent selectivity ion-exchange membrane.The current density of described bipolar membrane electrodialysis is 10 ~ 100mA/cm 2, the liquid flowing speed in electrodialyzer is 10 ~ 100L/h, and block board thickness is 0.5 ~ 1.2mm.
The present invention first with soda ash and/or sodium hydroxide for precipitation agent, adopt fluidization grain ball reactor to carry out decalcification process to brine waste; And then remove firmly with sodium hydroxide-flocculent precipitation degree of depth, fall the organism existed in silicon and removal system; After flocculation sediment, in handled former aqueous systems, hardness (with calcium, magnesium ion total amount) is not more than 150mg/L, and silicone content (in silicon-dioxide) is not more than 30mg/L; Enter bipolar membrane electrodialysis device front without the need to experiencing any concentration operation, former water initial conductivity is about 8-30ms/cm.
Strong brine except hard operation be for the calcium ion in system and magnesium ion, according to ion-product constant: deliming be rely on carbanion add formation precipitation of calcium carbonate, demagging be then rely on hydroxide ion add formation magnesium hydrate precipitate.If so calcium is more in system, and total alkalinity lower (carbonate or carbanion lower), then need to add sodium carbonate (i.e. soda ash); And the magnesium in removal system relies on to add sodium hydroxide, concrete add-on then relies on the concrete composition situation of hardness in former aqueous systems and content to determine according to stoichiometric ratio.
The present invention adopts bipolar membrane electrodialysis process to carry out recycling treatment to through above-mentioned pretreated high-salt wastewater, and salt is converted into bronsted lowry acids and bases bronsted lowry, for the regeneration of desalination workshop section ion exchange resin and the pre-treatment workshop section etc. of high-salt wastewater resource utilization; Process the light salt brine obtained directly to intake as desalination workshop section.
Brine waste before entering bipolar membrane electrodialysis device without the need to experiencing any concentration operation.General, its initial conductivity is about 8 ~ 30ms/cm.Adopt two-way to arrange when brine waste enters bipolar membrane electrodialysis device, one open one standby.The ion content that the conversion of two-way is intake according to desalination workshop section judges, is namely as the criterion with the higher limit being not more than surface water desalination workshop section water inlet ion content, such as 1000mg/L.Produce acid and produce paper mill wastewater and should require to determine according to reuse, be generally not more than 1mol/L; And when behind the sour room supplement part acid, alkali taking-up with pure water after, alkali room, the concentration of bronsted lowry acids and bases bronsted lowry should be not less than 0.02mol/L.
In the operational path of the bipolar membrane electrodialysis process of routine, pre-treatment adopts conventional lime method or ion exchange method usually, then with intermittent type bipolar membrane electrodialysis resource utilization high-salt wastewater, adopt perseverance (electricity) flow operation of small electric flow density, the concentration of gained bronsted lowry acids and bases bronsted lowry is lower.Compared with prior art, brine waste recycling processing method of the present invention, overcome prior art defect: (1) pre-treatment cost reduces greatly, (2) easy and simple to handlely scale operation reality can be applied to, (3) the bronsted lowry acids and bases bronsted lowry concentration obtained directly is satisfied with the cleaning of regeneration of ion-exchange resin or film, and utility value is high, and the light salt brine that (4) produce directly returns removal bitter and fishiness, realize waste water " zero release ", avoid environment.
Brine waste recycling processing method of the present invention, processing cost is low, processing power is high, not only significantly can reduce desalinating process water consumption, and useless (salt) can be become into precious (acid, alkali), thus greatly reduce the comprehensive water producing cost of desalinating process, and effectively prevent high-salt wastewater in line and cause environmental pollution.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of a kind of surface water desalting plant of the present invention by-product salt-containing waste water treatment method.
Embodiment
Be described in further detail technical scheme of the present invention below in conjunction with embodiment and accompanying drawing, protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Certain enterprise adopts ion exchange method to carry out surface water desalination and produces water of productive use.In by-product brine waste heavy metal ion and solid suspension content less, the typical case of water sample mainly consists of: Na +be 158.48 ± 50mmol/L, Ca 2+be 21.764 ± 15mmol/L, Mg 2+be 7.83 ± 5mmol/L, SO 4 2-be 2.92 ± 2mmol/L, NO 3 -be 1.22 ± 1mmol/L, Cl -be 222.50 ± 70mmol/L, silicone content is (with SiO 2meter) be 1.15 ± 1mmol/L; Basicity (HCO 3 -and CO 3 2-) be 1.84 ± 1.5mmol/L; UV 254be 1.857; System PH is 7.10; Specific conductivity is 20 ± 5ms/cm.Adopt following method process and this brine waste of resource utilization:
The first step, pre-treatment.For the water sample of above-mentioned average composition, first (filler is pomegranate stone sand waste water pump to be entered fluidization grain ball reactor, size controlling is 150 μm-200 μm, be 1:5 reactor length-to-diameter ratio without the pack height under mobility status and the ratio of reactor be 100:1, add soda ash-caustic soda according to stoichiometric ratio and implement decalcification operation; And then in above-mentioned water outlet, add flocculation agent aluminum chloride 100mg/L and coagulant aids non-ionic polyacrylamide 85mg/L, add appropriate sodium hydroxide regulation system pH after stirring to leave standstill after 10.80, the degree of depth except hard, fall silicon and remove remaining organism in aqueous systems.Get upper strata water sample analysis to know, Ca 2+and Mg 2+total amount is 62.61mg/L, and silicone content is (with SiO 2meter) be 12.64mg/L, UV 254be 1.116.
Second step, bipolar membrane electrodialysis.Each electrodialyzer is containing 60 unit, and each unit comprises a slice Bipolar Membrane (German Fuma-Tech product), a slice Monovalent selectivity cationic exchange membrane (Asahi Glass film CSO) and a slice Monovalent selectivity anion-exchange membrane (Asahi Glass film ASV).Membrane area is 100mm × 200mm, and dividing plate adopts the elastification polypropylene separator that 1mm is thick.Liquid flowing speed in electrodialyzer controls as 80L/h.Bipolar membrane electrodialysis is operating as perseverance (electricity) stream mode, and initial current density is set as 30mA/cm 2.Adopt two-way to arrange when by-product brine waste enters bipolar membrane electrodialysis device, one open one standby.The most high ion content that the conversion of two-way is intake according to earth's surface water desalination process judges, when Ji Danggai road water inlet ion content is less than 1000mg/L, closes this road, and the other road of instantaneous starting.The maximum concentration producing acid and product paper mill wastewater soda acid needed for the water desalination process of earth's surface is determined (regenerating ion exchange resin acid base concentration is 1mol/L).Instantaneous with pure water supplement part acid, alkali take out after sour room, alkali room, now the concentration of sour room and alkali room should be 0.02mol/L(to ensure the initial power up phase of bipolar membrane electrodialysis process, sour room and alkali room resistance unlikely excessive, reduction energy consumption).
The analysis showed that, Na in gained hydrochloric acid +and K +total amount is less than 0.02mol/L, Ca 2+and Mg 2+total amount is less than 0.2mmol/L, and silicone content is (with SiO 2meter) be less than 0.1mg/L.Brine waste ions content after process controls to be less than 1000mg/L, due to before entering bipolar membrane electrodialysis through except hard, silica removal and the pre-treatment of organic matter removal even depth, so de-salted water production workshop section directly can be returned.The average current efficiency of bipolar membrane electrodialysis is 68%, and energy consumption is that 3.2kwh/kg(is in sodium hydroxide).
Embodiment 2
Certain enterprise adopts reverse osmosis method to carry out surface water desalination and produces water of productive use.In by-product brine waste heavy metal ion and solid suspension content less, the typical case of water sample mainly consists of: Na +be 65 ± 15mmol/L, Ca 2+be 2.4 ± 1mmol/L, Mg 2+be 0.5 ± 0.3mmol/L, SO 4 2-be 3.3 ± 2mmol/L, NO 3 -be 2.9 ± 1mmol/L, Cl -be 72.7 ± 20mmol/L, silicone content is (with SiO 2meter) be 1.5 ± 0.5mmol/L; Basicity (HCO 3 -and CO 3 2-) be 4.5 ± 1.5mmol/L; UV 254be 1.729; System PH is 7.10; Specific conductivity is 10.5 ± 2ms/cm.Adopt following method process and this brine waste of resource utilization:
The first step, pre-treatment.For the water sample of above-mentioned average composition, first (filler is pomegranate stone sand waste water pump to be entered fluidization grain ball reactor, size controlling is 220 μm-260 μm, be 1:4 reactor length-to-diameter ratio without the pack height under mobility status and the ratio of reactor be 120:1, add soda ash-caustic soda according to stoichiometric ratio and implement decalcification operation; And then in above-mentioned water outlet, add flocculant poly aluminum chloride 100mg/L and coagulant aids anion-polyacrylamide 85mg/L, then add appropriate sodium hydroxide regulation system pH and leave standstill after 10.65, the degree of depth except hard, fall silicon and remove remaining organism in aqueous systems.Get upper strata water sample analysis to know, Ca 2+and Mg 2+total amount is 23.39mg/L, and silicone content is (with SiO 2meter) be 5.57mg/L, UV 254be 1.077.
Second step, bipolar membrane electrodialysis.Each electrodialyzer is containing 60 unit, and each unit comprises a slice Bipolar Membrane (Hebei Guang Ya company limited product), a slice Monovalent selectivity cationic exchange membrane (Asahi Glass film CSO) and a slice Monovalent selectivity anion-exchange membrane (Asahi Glass film ASV).Membrane area is 100mm × 200mm, and dividing plate adopts the elastification polypropylene separator that 0.8mm is thick.Liquid flowing speed in electrodialyzer controls as 80L/h.Bipolar membrane electrodialysis is operating as perseverance (electricity) stream mode, and the initial current density upper limit is set as 15mA/cm 2.Adopt two-way to arrange when brine waste enters bipolar membrane electrodialysis device, one open one standby.The most high ion content that the conversion of two-way is intake according to earth's surface water desalination process judges, when the ion content of Ji Dang mono-tunnel water inlet is less than 800mg/L, closes this road, and the other road of instantaneous starting.The maximum concentration producing acid and product paper mill wastewater soda acid needed for desalinating process is determined (pre-treatment or cleaning fouling membrane acid base concentration 0.5mol/L).Instantaneous with pure water supplement part acid, alkali take out after sour room, alkali room, now the concentration of sour room and alkali room is about 0.02mol/L.
The analysis showed that, Na in gained hydrochloric acid +and K +total amount is less than 0.02mol/L, Ca 2+and Mg 2+total amount is less than 0.1mmol/L, and silicone content is (with SiO 2meter) be less than 0.1mg/L.Brine waste ions content after process controls to be less than 800mg/L, due to before entering bipolar membrane electrodialysis through except pre-treatment such as hard, silica removal and organic matter removals, so de-salted water production workshop section directly can be returned.The average current efficiency of bipolar membrane electrodialysis is 81%, and energy consumption is that 2.6kwh/kg(is in sodium hydroxide).

Claims (6)

1. a treatment process for surface water desalting plant by-product brine waste, the method comprises the following steps successively:
A. pre-treatment, first with soda ash and/or sodium hydroxide for precipitation agent, adopt fluidization grain ball reactor to carry out decalcification process to described brine waste; Then add flocculation agent, adjust ph to 10 ~ 11, flocculation sediment removes the hardness of described brine waste, silicon and organism;
B. electrodialysis process, carries out bipolar membrane electrodialysis process to described pretreated water outlet; Salt in described water outlet is converted into bronsted lowry acids and bases bronsted lowry by described electrodialysis process, and the light salt brine that described electrodialysis process obtains returns described desalting plant.
2. treatment process according to claim 1, is characterized in that:
The desalting method that described desalting plant adopts is: reverse osmosis method, electroosmose process, ion exchange method or hot method.
3. treatment process according to claim 1, is characterized in that:
Described in step a during decalcification, the filler of described fluidization grain ball reactor is pomegranate stone sand, and its particle diameter is 100 μm-300 μm; Be 1:5-1:4 without the pack height of the described filler under mobility status and the ratio of reactor, reactor length-to-diameter ratio is 80:1-120:1.
4. treatment process according to claim 1, is characterized in that:
Described in step a during flocculation sediment, first in described decalcification process water outlet, add flocculation agent and coagulant aids, then add sodium hydroxide adjust ph to 10.5 ~ 11; Described flocculation agent is aluminum chloride, polymerize aluminum chloride or aluminium iron sulfate, and described coagulant aids is cationic or non-ionic polyacrylamide.
5. treatment process according to claim 1, is characterized in that:
In step b, described bipolar membrane electrodialysis is three-chamber type, is followed successively by feed liquid room, sour room and alkali room; The cationic exchange membrane adopted and anion-exchange membrane are Monovalent selectivity ion-exchange membrane.
6. treatment process according to claim 1, is characterized in that:
In step b, the current density of described bipolar membrane electrodialysis is 10 ~ 100mA/cm 2, the liquid flowing speed in electrodialyzer is 10 ~ 100L/h, and block board thickness is 0.5 ~ 1.2mm.
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CN105906114A (en) * 2016-07-05 2016-08-31 中国科学技术大学 Bipolar membrane electrodialysis system for treating saliferous organic amine waste water by using carbon dioxide and process thereof
CN106396210A (en) * 2016-12-06 2017-02-15 淄博格瑞水处理工程有限公司 Anion/cation resin regeneration wastewater zero-discharge recycling device
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CN107601729A (en) * 2017-11-03 2018-01-19 宝钢工程技术集团有限公司 For the dense salt waste water zero discharge treatment process of steel industry and system
CN108002604A (en) * 2017-07-21 2018-05-08 义乌赛蓝膜科技有限公司 A kind of method of concentrated seawater recycling
CN108675466A (en) * 2018-04-23 2018-10-19 天津大学 A kind of preprocess method preventing fouling membrane in coal chemical industry recirculated water reuse
CN108793573A (en) * 2018-06-14 2018-11-13 浙江奇彩环境科技股份有限公司 The processing method of pyridine waste water with high salt
CN110282707A (en) * 2019-06-28 2019-09-27 武汉大学 A kind of desulfurization wastewater recycling electrodialysis plant
CN110697935A (en) * 2019-10-17 2020-01-17 青海盐湖工业股份有限公司 Refining system and refining method for byproduct brine
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CN110282707A (en) * 2019-06-28 2019-09-27 武汉大学 A kind of desulfurization wastewater recycling electrodialysis plant
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CN111039488A (en) * 2020-01-06 2020-04-21 大唐环境产业集团股份有限公司 Desulfurization wastewater recycling treatment system and treatment method
CN111348756A (en) * 2020-04-01 2020-06-30 广西广宇水资源技术开发有限公司 Process for removing temporary hardness of water by chemical reaction
CN111762954A (en) * 2020-07-09 2020-10-13 江苏肯创环境科技股份有限公司 High-salt-content wastewater treatment method
CN113429032A (en) * 2021-06-01 2021-09-24 浙江工业大学 Treatment method of high-salt high-COD wastewater
US11502323B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell and methods of use thereof
US11502322B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell with heat pump
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