CN103172216A - Method for advanced treatment and reuse of wastewater - Google Patents

Method for advanced treatment and reuse of wastewater Download PDF

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Publication number
CN103172216A
CN103172216A CN2012104835330A CN201210483533A CN103172216A CN 103172216 A CN103172216 A CN 103172216A CN 2012104835330 A CN2012104835330 A CN 2012104835330A CN 201210483533 A CN201210483533 A CN 201210483533A CN 103172216 A CN103172216 A CN 103172216A
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water
ultrafiltration
pipe
backwash
inlet pipe
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阿力木江·斯拉木
史殿彬
石文忠
谢海燕
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XINJIANG ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
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XINJIANG ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
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Abstract

The invention provides a method for advanced treatment and reuse of wastewater. The method is characterized in that a biochemical device adopting a biological aerated filter comprises a water inlet pipe, a backwashing water inlet pipe, a backwashing air inlet pipe, an aerator pipe, a backwashing drain pipe, a water outlet pipe, water distributors, supporting fillers, ceramic fillers, a cell body and a filter plate, wherein energy consumption is only 60% of that of a contact oxidation method after secondary wastewater is subjected to biochemical treatment in the biological aerated filter and organic pollutants are removed; a separation device of an ultrafiltration pressing film comprises a biological aerated filter water discharging tank, a lift pump, a safety filter, ultrafiltration films, an ultrafiltration water production pipe and an ultrafiltration concentrated water pipe, wherein the ultrafiltration films can be used for intercepting matters with molecular weights of 3*10000-1*10000 and removing most colloidal silicon and organic matters in the water; and an electric-absorption desalting device comprises an ultrafiltration device water discharging tank, a water supply pump, a filtering device, an electro-adsorption module, a water production pipe, a reuse water tank, a regenerative pump and a regenerative water outlet, wherein raw water lifted by the regenerative pump is flushed by a short-circuited and standing module so as to regenerate an electrode, and a pollution discharge process is a backwashing process of the module.

Description

A kind of method for the advanced treatment of wastewater reuse
Technical field
The present invention relates to the advanced treatment of wastewater technology, be particularly useful for the moisturizing of advanced treatment of wastewater reuse recirculated water, utilize the linkage technique of BAF, ultra-filtration membrane, electro-adsorption, the method realizes the purpose of reutilization of the sewage.
Background technology
At present, the high-end reuse water for industry adopts " BAF (BAF)+reverse osmosis (RO) " technique substantially.RO is reverse osmosis technology, to the strong solution of the semi-permeable membranes joint rear process opposite with the naturally osmotic phenomenon that produce of exerting pressure, its principle of work is with allowing water molecules see through, and do not allow the semi-permeable membranes that solute sees through that pure water and salt water are separated, water molecules will see through to salt water one side by film from pure water one side, make the liquid level of salt water one side rise to a certain height, when infiltration reaches dynamic balance state, there is certain solution osmotic pressure in the semi-permeable membranes both sides, apply pressure greater than this solution osmotic pressure in salt water one side, water molecules oppositely penetrates into pure water one side by film from salt water one side, salt water is desalinated, but reverse osmosis technology is had relatively high expectations to the pre-treatment of waste water, initial investment is larger, reverse osmosis membrane is expensive, work-ing life is short, water production rate is lower, make processing cost improve, membrane module easily stops up, desalting effect depends on the characteristic of semi-permeable membranes, ratio of desalinization is higher, and can not regulate and control, it is not that very high high-end industrial reuse water (as circulating cooling make-up water etc.) is larger waste that ratio of desalinization is required, exist unreasonable economically problem.
Literature search discloses: the utility model patent that 1. in January, 2007, Sinopec Group applied for, disclosed BAF+sterilization and disinfection+strainer+electric adsorption desalting device organic assembling, the reuse water requirement is arrived in the trade effluent and the sanitary sewage disposal that secondary biochemical treatment are reached national grade one discharge standard.2. in May, 2009 Xi'an Technology University's application carries out the Combination application patent with BAF and two kinds of technology of ultrafiltration membrance filter, with BAF as pre-treatment, ultrafiltration membrance filter is as subsequent disposal, and have simultaneously biological treatment and physical filtering dual function concurrently in this technique, after processing, urban sewage reutilization city miscellaneous water water quality standard (GB/T18920-2002) is satisfied in water outlet.3. in January, 2011, the pre-treatment of mountain area tap water and the patent of immersed ultrafiltration membrane process method for combined use and device were invented by Tsing-Hua University, this technique is at first with former water introducing transverse flow dropping, aeration and biological filter tank, in water, particulate matter is partly held back, small organic molecule and ammonia nitrogen are degraded by part biological, water quality gets purification to a certain extent, then water outlet enters into film and processes the pond and further process, ultra-filtration membrane can be removed the particulate matter in former water well, hold back two worms, red worm, algae, bacterium is virus even, the coagulating agent that adds and powder charcoal can improve the operation condition of removal of pollutants effect and ultra-filtration membrane well, thereby reach easy, preparation meets the target call of national standard drink water economically.4. the patent of a kind of papermaking advanced waste treatment recycling device of in May, 2011 Zhejiang University's disclosure of the invention and method, its device comprise the first water collecting basin, BAF, the second water collecting basin, sandfiltration pot, carbon filter tank, the 3rd water collecting basin, ultrafiltration system and the reverse osmosis system that is communicated with successively.5. Liaoning Provincial Academy of Environment Sciences developed a cover and related to particularly applying for a patent of a kind of BAF coupling ultrafiltration reverse osmosis device of processing ethylene plant's sewage of sewage treatment area in July, 2011, comprise biological filter treatment unit and ultra filtering reverse osmosis treatment unit, the biological filter treatment unit is connected with the ultra filtering reverse osmosis treatment unit by quartz filter and disc filter.
The present invention is a kind of linkage process of carrying out reuse after desalination that sewage is carried out carrying out after biochemical treatment, its ratio of desalinization can regulate and control according to water quality needs, and technique is simple, running cost is low, after the higher economical advanced treatment of wastewater of producing water ratio and the technology of carrying out the desalination reuse, to further enlarge reclaimed urban waste water high-quality reuse water field in industrial circle and play qualitative leap, will produce splendid economic benefit and social benefit, have important promotional value, show technical progress.
Summary of the invention
Order of the present invention is: adopt " BAF+ultrafiltration+electro-adsorption " coupling technique, be used for sewage is implemented advanced treatment and reuse to the high-end reuse water of industry, effluent quality satisfies the process water requirement and energy-saving and cost-reducingly reaches 60%.
The object of the present invention is achieved like this: a kind of method for the advanced treatment of wastewater reuse, take the technology of " BAF+ultrafiltration+electro-adsorption ", and sewage is implemented advanced treatment and reuse, step is implemented as follows;
The biochemistry of BAF is disposed: device is made of water inlet pipe 1, backwash water inlet pipe 2, backwash inlet pipe 3, aeration tube 4, backwash water shoot 5, rising pipe 6, water distributor 7, support filler 8, ceramic filter material 9, pond body 10, filter plate 11: when operation, the pipeline valve that connects water inlet pipe 1, aeration tube 4, rising pipe 6 is opened, and the pipeline valve that connects backwash inlet pipe 3, backwash water shoot 5 is closed; When backwash, advanced promoting the circulation of qi is washed, the pipeline valve that connects water inlet pipe 1, aeration tube 4, rising pipe 6 is closed, with backwash inlet pipe 3 valve opens, move 3-5 minute, then with the valve open of backwash water inlet pipe 2, backwash water shoot 5, move 3-5 minute, with backwash inlet pipe 3 valve closess, reruned 3-5 minute, with backwash water inlet pipe 2, backwash water shoot 5 valve closess; Wherein in pond body 10 by the upper filter plate 11 of laying successively ceramic filter material 9 and support filler 8 under straight, uniform water distributor 7 on its filter plate 11; B-grade sewage is disposed through BAF, removes organic pollutant, and the consumption of its energy consumption is only for adopting 60% of contact oxidation method;
Ultrafiltration adds the separation of press mold and disposes: device is made of effluent of aeration biological filter case 12, lift pump 13, cartridge filter 14, ultra-filtration membrane 15, ultrafiltration water producing pipe 16, the dense water pipe 17 of ultrafiltration; When operation, the lift pump 13 that connects effluent of aeration biological filter case 12 is opened, and with the valve open of ultrafiltration water producing pipe 16, the dense water pipe 17 of ultrafiltration, filtrate connects two components by ultrafiltration water producing pipe 16 and collects from device, the impurity that filters discharges by the dense water pipe 17 of ultrafiltration, and wherein two components connect lift pump 13 from the water inlet of device by cartridge filter 14; Two groups of active ultra-filtration membranes 15 of pressure that ultra-filtration equipment contains, but molecular weight cut-off is the material of 3 * 10000-1 * 10000, removes the colloid silicon and the organism that contain in water;
The desalination of electro-adsorption is disposed: device is made of ultrafiltration apparatus water tank 18, working shaft 19, strainer 20, electro-adsorption module 21, water producing pipe 22, reuse water water tank 23, regenerative pump 24, regeneration water outlet 25; When operation, the former water that is stored in ultrafiltration apparatus water tank 18 is squeezed into cartridge filter 20 by working shaft 19, is dammed at this procedure greater than residual solids suspended substance or the throw out of 5 μ m, and water is admitted to electro-adsorption module 21 again, in water, deliquescent salt is adsorbed, and water quality is cleaned; Wherein the water of regeneration purification enters reuse water water tank 23 through water producing pipe 22, and the regeneration draining is discharged through regeneration water outlet 25 pipes; The regeneration flow process is to rinse through the standing module of short circuit with the former water that regenerative pump 24 promotes, make electrode regeneration, water after back flushing is admitted to ultrafiltration apparatus water tank 18, enters the water latent period blowdown of ultrafiltration apparatus water tank 18, and wherein blowdown flow process is also the backwashing procedures of module.
The sewage that described method is processed can be used for once-through cooling water, open type recirculated cooling water make up water and boiler feedwater.
The BAF biochemical treatment that the present invention adopts has low-concentration organic in the degraded reused sewage and the dual-use function of filtration, and the sewage after guaranteeing to process reduces Organic pollutants to the follow-up desalinating process in the coupling technology; The ultrafiltration desalting treatment that adopts, it is a kind of pressure active membrane, but the micropore screening molecular weight cut-off by the film surface is the material of 3 * 10000-1 * 10000, when processed water is surperficial by film in order to certain flow velocity by means of the work of ambient pressure, water molecules and molecular weight see through film less than the solute of 300-500, and greater than the particulate of fenestra, macromole etc. because sieving action is trapped, the most of colloid silicon that contains in water can be removed, can remove a large amount of organism etc. simultaneously; The desalting treatment rate of electro-adsorption can regulate and control according to water quality needs, and the economical desalting technology that technique is simple, running cost is low, producing water ratio is high will play qualitative leap further expansion the in the high-end reuse water field of industrial circle to reclaimed urban waste water; Present method adopts " BAF+ultrafiltration+electro-adsorption " coupling disposal technology extremely effective, has important practical value, shows technical progress.
Description of drawings
The present invention is described further by reference to the accompanying drawings.
Accompanying drawing 1 is the structural representation of aeration biological filter device;
As shown in the figure: 1-water inlet pipe, 2-backwash water inlet pipe, 3-backwash inlet pipe, 4-aeration tube, 5-backwash water shoot, 6-rising pipe, 7-water distributor, 8-support filler, 9-ceramic filter material, 10-pond body, 11-filter plate.
Accompanying drawing 2 is the structural representation of ultra-filtration equipment;
As shown in the figure: 12-effluent of aeration biological filter case, 13-lift pump, 14-cartridge filter, 15-ultra-filtration membrane, 16-ultrafiltration water producing pipe, the dense water pipe of 17-ultrafiltration.
Accompanying drawing 3 is the structural representation of electro-adsorption device;
As shown in the figure: 18-ultrafiltration apparatus water tank, 19-working shaft, 20-strainer, 21-electro-adsorption module, 22-water producing pipe, 23-reuse water water tank, 24-regenerative pump, the 25-water outlet of regenerating.
Accompanying drawing 4 is process flow diagram;
As shown in the figure: technical process is divided into 3 steps: workflow, regeneration flow process, blowdown flow process;
Workflow wherein: the former water that is stored in the ultrafiltration apparatus water tank is squeezed into cartridge filter by working shaft, residual solids suspended substance or throw out greater than 5 μ m are dammed at this procedure, water is admitted to the electro-adsorption module again, and in water, deliquescent salt is adsorbed, and water quality is cleaned; The flow process of wherein regenerating is exactly the backwash process of module, and the former water that promotes with regenerative pump rinses through the standing module of short circuit, makes electrode regeneration; Water after back flushing is admitted to the ultrafiltration apparatus water tank, enters the water latent period blowdown of ultrafiltration apparatus water tank; Wherein blowdown flow process for regeneration, is the backwashing procedures of module.
Embodiment
The present invention is described further in conjunction with the embodiments.
Embodiment
Take the technology of " BAF+ultrafiltration+electro-adsorption ", step is as follows;
1) biochemistry of BAF is disposed
Its apparatus structure: in pond body 10 by the upper filter plate 11 of laying successively ceramic filter material 9 and support filler 8 under straight, uniform water distributor 7 on its filter plate 11; Lay aeration tube 4 in the interlayer of ceramic filter material 9 and support filler 8; Water inlet one side in filter plate 11 bottoms is laid with the backwash water inlet pipe 2 that is communicated with water inlet pipe 1, and opposite side is installed with backwash inlet pipe 3; On the upper strata of filling ceramic filter material 9, namely water outlet one side on pond body 10 is installed with backwash water shoot 5 and rising pipe 6;
When operation, the pipeline valve that connects water inlet pipe, aeration tube, rising pipe to be opened, the pipeline valve that connects backwash inlet pipe, backwash water shoot is closed; When backwash, advanced promoting the circulation of qi is washed, and the pipeline valve that connects water inlet pipe, aeration tube, rising pipe is closed, with backwash inlet pipe valve open, move 3-5 minute, with the valve open of backwash water inlet pipe, backwash water shoot, move after 3-5 minute, with backwash inlet pipe valve closes again, reruned 3-5 minute, with backwash water inlet pipe, backwash water shoot valve closes, recover normal operation this moment, the consumption of energy consumption is only for adopting 60% of contact oxidation method.
2) ultrafiltration adds the separation disposal of press mold
Its apparatus structure: effluent of aeration biological filter case 12 is connected with the tripping device of parallel connection by lift pump 13, cartridge filter 14; The liquid-inlet pipe that is loaded with the tripping device in parallel of ultra-filtration membrane 15 connects cartridge filter 14 rising pipes, and upper outlet one end of tripping device in parallel connects the dense water pipe 17 of ultrafiltration, and the other end connects ultrafiltration water producing pipe 16;
When operation, to open lift pump and also will connect the valve open of ultrafiltration water producing pipe, the dense water pipe of ultrafiltration, filtrate connects two components by the ultrafiltration water producing pipe collects from device, and the impurity of filtration discharges by the dense water pipe of ultrafiltration; Two groups of ultra-filtration equipment utilize the active ultra-filtration membrane of pressure, but molecular weight cut-off is the material of 3 * 10000-1 * 10000, removes the most of colloid silicon and the organism that contain in water.
3) desalination of electro-adsorption is disposed
Its apparatus structure: strainer 20 and electro-adsorption module 21 are installed on the pipeline that ultrafiltration apparatus water tank 18 and reuse water water tank 23 are installed successively; In parallel regenerative pump 24 and working shaft 19 on the pipeline of ultrafiltration apparatus water tank 18 and strainer 20, wherein regenerative pump 24 in parallel is connected with the outlet pipe of ultrafiltration apparatus water tank 18 with the inlet pipe of working shaft 19, and regenerative pump 24 in parallel is connected with strainer 20 inlet pipes with the outlet pipe of working shaft 19; Outlet pipe one end of its middle filtrator 20 connects electro-adsorption module 21 and is connected with reuse water water tank 23 by water producing pipe 22, and the other end is communicated with regeneration water outlet 25 drainings;
In when operation, the former water of ultrafiltration apparatus water tank is squeezed into strainer by working shaft, sends into the electro-adsorption module, water producing pipe enters the reuse water water tank, is dammed at this procedure greater than residual solids suspended substance or the throw out of 5 μ m.
The compliance test result of the inventive method:
Set up cover " BAF+ultrafiltration+electro-adsorption " technique in high and new technology industrial development zone regeneration water factory, process the sewage of east of a river sewage work, the average effluent quality of ultrafiltration sees Table 1.
Table 1 ultrafiltration water outlet and industry water standard contrast
Learnt by upper table data: COD, ammonia nitrogen and TDS are all higher than standards for industrial water usage; If the ultrafiltration water outlet is used for process water, also need further to remove organism and salinity in water.
Generally, the electro-adsorption module is not particularly limited chlorine residue in former water, organism, high valence ion, and module influent quality standard sees Table 2.
Table 2 electro-adsorption module influent quality standard
Learnt by upper table data: for electro-adsorption water inlet required, ultrafiltration went out water suspension and total alkalinity higher than the electro-adsorption requirement of intaking, and before water enters the electro-adsorption module, first pending water is carried out the acidifying stripping, (shows as HCO to reduce influent alkalinity 3 -), and then through the cartridge filter pre-treatment, remove the partial suspended thing in water, make water quality reach electro-adsorption water inlet requirement.
The water quality standard contrast that electro-adsorption effluent quality and reuse water are used as the process water water source sees Table 3.
Table 3 electro-adsorption effluent quality and regeneration water quality Comparison of standards
Learnt by upper table data: electro-adhesion device is respectively 71.4%, 77.4%, 63.5%, 66.2% and 47.6% to the average removal rate of TDS, muriate, total hardness, ammonia nitrogen and COD, producing water ratio 82.2%, and average energy consumption is 1.6kwh/t.
The method of this BAF+ultrafiltration+electro-adsorption is compared with ordinary method, has following advantage:
1) the electro-adsorption technology is when carrying out the water demineralizing processing, main energy expenditure is in the migration of ion, do not occur and have obvious chemical reaction on electrode, compare with desalination technology such as distillation method, reverse osmosis methodes, the electro-adsorption technology is that having any different property ground extracts the water intermediate ion and separates, rather than water molecules is separated from pending former water, need not high temperature or high pressure, the energy that consumes is relatively low, the electric energy that electrode applies is stored on electric double layer capacitance, the energy of storing reclaims a part when electrode regeneration, thereby has saved the energy.Electro-adsorption adopts carbon class electrode materials, has avoided because changing the raising of the running cost that core component brings; The electro-adsorption technology is reusable for the wash-down water of regeneration, and producing water ratio can reach more than 75%.
2) the electro-adsorption device adopts special inert material as electrode, adopts the channel-type structure of grade width, and head loss is little, and is less demanding to raw water quality, and pre-treatment is simple, and system is difficult for stopping up.When original water basicity is higher, only need the acid adding aeration to reduce basicity and get final product, all kinds of water quality are had good adaptability; If influent quality is unstable; still need the electro-adsorption module is carried out certain protectiveness cleaning; purpose is particulate, colloid, biological clay and the organic matter removal that material is adsorbed; this is simple to operate; only need former water pH value is transferred to 2.0-2.5, the pickling that module is carried out about 2h gets final product.
3) electro-adsorption is an environmentally friendly technology, the electric energy that only needs during electrode regeneration to store discharges, do not need any chemical agent to regenerate, compare with ion exchange technique, reduced transportation, storage and operational trouble at concentrated acid, concentrated base, and not to external world's discharging acid-base neutralisation liquid, compared with reverse osmosis, need not to add the chemical agents such as reductive agent, dispersion agent, Scale inhibitors, therefore electro-adsorption technology environmental pollution is less.
4) the electro-adsorption demineralization technology is less demanding to influent quality, and water quality is had very strong shock-resistance, and can control the desalination rate according to voltage-regulation and change in the scope of 60%-90%, can be applied to tap water and dirt (giving up) water treatment.
Electro-adsorption desalination and reverse osmosis desalination technical characterstic relatively see Table 4;
The comparison of table 4 electro-adsorption technique and reverse osmosis process technical characterstic
Annotate: ★ is that performance is relatively excellent.
Learnt by upper table data: from the desalination rate, reverse osmosis than electro-adsorption height a bit, but for dirty (giving up) water desalination, do not need too high desalination rate, and need to pay close attention to total desalination amount, because the electro-adsorption water rate of recovery is higher, it is more than reverse osmosis that identical dense water yield salt is removed total amount.
The inventive method is implemented to process to the sewage of the east of a river, Urumchi sewage work, and water factory's effluent quality reaches " urban wastewater treatment firm pollutant emission standard " (GB18918) secondary standard.
This testing apparatus BAF is utilized the productive unit of North Area, Wu Shi high and new technology industrial development zone regeneration water factory, comprising the ceramic filter material of filler; Ultra-filtration equipment is a day treatment scale 20m 3/ d, ultra-filtration membrane adopt the hollow fiber column type membrane module of the UOF4 model of Tianjin Motimo Membrane Technology Co., Ltd.'s production, and the electro-adsorption device is a day treatment scale 20m 3/ d, the electro-adsorption module adopts the film piece of the EST-20 model of Aisite Purifying Apparatus Co., Ltd., Changzhou's production.
The method has that resistance to crocking is strong, pre-treatment simply, does not need to add special agent, the characteristic of flux stabilized,, energy-conserving and environment-protective low without frequent cleaning, running cost.The method has broken through the bottleneck of dirty (give up) water reuse reuse technology, for the development in dirt (giving up) water reuse reuse field provides that resistance to crocking is strong, the desalination technology of economic environmental protection, applied range.

Claims (2)

1. method that is used for the advanced treatment of wastewater reuse, it is characterized in that: take the technology of " BAF+ultrafiltration+electro-adsorption ", sewage is implemented advanced treatment and reuse, step is implemented as follows;
The biochemistry of BAF is disposed: device is made of water inlet pipe (1), backwash water inlet pipe (2), backwash inlet pipe (3), aeration tube (4), backwash water shoot (5), rising pipe (6), water distributor (7), support filler (8), ceramic filter material (9), pond body (10), filter plate (11): when operation, the pipeline valve that will connect water inlet pipe (1), aeration tube (4), rising pipe (6) is opened, and the pipeline valve that connects backwash inlet pipe (3), backwash water shoot (5) is closed; When backwash, advanced promoting the circulation of qi is washed, the pipeline valve that will connect water inlet pipe (1), aeration tube (4), rising pipe (6) is closed, with backwash inlet pipe (3) valve open, move 3-5 minute, then with the valve open of backwash water inlet pipe (2), backwash water shoot (5), move 3-5 minute, with backwash inlet pipe (3) valve closes, reruned 3-5 minute, with backwash water inlet pipe (2), backwash water shoot (5) valve closes; Wherein in pond body (10) by the upper filter plate (11) of laying successively ceramic filter material (9) and support filler (8) under straight, upper uniform the water distributor (7) of its filter plate (11); B-grade sewage is disposed through BAF, removes organic pollutant, and the consumption of its energy consumption is only for adopting 60% of contact oxidation method;
Ultrafiltration adds the separation of press mold and disposes: device is made of effluent of aeration biological filter case (12), lift pump (13), cartridge filter (14), ultra-filtration membrane (15), ultrafiltration water producing pipe (16), the dense water pipe of ultrafiltration (17); When operation, the lift pump (13) that will connect effluent of aeration biological filter case (12) is opened, and with the valve open of ultrafiltration water producing pipe (16), the dense water pipe of ultrafiltration (17), filtrate connects two components by ultrafiltration water producing pipe (16) and collects from device, the impurity that filters discharges by the dense water pipe of ultrafiltration (17), and wherein two components connect lift pump (13) from the water inlet of device by cartridge filter (14); Two groups of active ultra-filtration membranes (15) of pressure that ultra-filtration equipment contains, but molecular weight cut-off is the material of 3 * 10000-1 * 10000, removes the colloid silicon and the organism that contain in water;
The desalination of electro-adsorption is disposed: device is made of ultrafiltration apparatus water tank (18), working shaft (19), strainer (20), electro-adsorption module (21), water producing pipe (22), reuse water water tank (23), regenerative pump (24), regeneration water outlet (25); When operation, the former water that is stored in ultrafiltration apparatus water tank (18) is squeezed into cartridge filter (20) by working shaft (19), residual solids suspended substance or throw out greater than 5 μ m are dammed at this procedure, water is admitted to electro-adsorption module (21) again, in water, deliquescent salt is adsorbed, and water quality is cleaned; Wherein the water of regeneration purification enters reuse water water tank (23) through water producing pipe (22), and the regeneration draining is discharged through regeneration water outlet (25) pipe; The regeneration flow process is to rinse through the standing module of short circuit with the former water that regenerative pump (24) promotes, make electrode regeneration, water after back flushing is admitted to ultrafiltration apparatus water tank (18), enter the water latent period blowdown of ultrafiltration apparatus water tank (18), wherein blowdown flow process is also the backwashing procedures of module.
2. method according to claim 1 is characterized in that: the sewage that the method is processed can be used for once-through cooling water, open type recirculated cooling water make up water and boiler feedwater.
CN2012104835330A 2012-11-23 2012-11-23 Method for advanced treatment and reuse of wastewater Pending CN103172216A (en)

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CN103508626A (en) * 2013-08-23 2014-01-15 福建省农业科学院农业工程技术研究所 Sewage purifier and application method thereof
CN103553216A (en) * 2013-10-17 2014-02-05 浙江大学宁波理工学院 Two-point water intake biofilter and method for inhibiting generation of dissolved organic nitrogen by using same
CN103727834A (en) * 2014-01-03 2014-04-16 中国轻工业武汉设计工程有限责任公司 Energy-saving type dual-combination circulation cooling water device
CN103727834B (en) * 2014-01-03 2015-09-02 中国轻工业武汉设计工程有限责任公司 A kind of energy-saving double combination cooling circulating water device
CN104478173A (en) * 2014-12-22 2015-04-01 新疆环境工程技术有限责任公司 Wastewater treatment and recycling integrated treatment process for coal chemical enterprise
CN104478173B (en) * 2014-12-22 2016-05-25 新疆环境工程技术有限责任公司 Coal chemical industry enterprises wastewater treatment and resource integrated treatment process
CN104803565A (en) * 2015-05-13 2015-07-29 武汉钢铁(集团)公司 Comprehensive wastewater treatment system for coke making enterprise and treatment and recycle method
CN109179913A (en) * 2016-08-04 2019-01-11 王尧尧 A kind of processing system of industrial wastewater
CN107651812B (en) * 2017-10-31 2020-10-27 华北水利水电大学 Advanced sewage treatment process
CN112358119A (en) * 2020-06-30 2021-02-12 北京工业大学 Graded micro-flocculation-activated alumina slow filtration-gravity drive type ultrafiltration combined system

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Application publication date: 20130626