CN108218007A - A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works - Google Patents

A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works Download PDF

Info

Publication number
CN108218007A
CN108218007A CN201810147763.7A CN201810147763A CN108218007A CN 108218007 A CN108218007 A CN 108218007A CN 201810147763 A CN201810147763 A CN 201810147763A CN 108218007 A CN108218007 A CN 108218007A
Authority
CN
China
Prior art keywords
water
iron
municipal
urban life
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810147763.7A
Other languages
Chinese (zh)
Inventor
刘芳
胡绍伟
陈鹏
王永
王飞
龙海萍
伊源辉
孙静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201810147763.7A priority Critical patent/CN108218007A/en
Publication of CN108218007A publication Critical patent/CN108218007A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/58Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/586Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/05Conductivity or salinity
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/06Controlling or monitoring parameters in water treatment pH
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/08Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/14NH3-N
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/15N03-N
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/16Total nitrogen (tkN-N)

Abstract

The present invention relates to a kind of urban life Treated sewage reusing in the method for integrated iron and steel works, include the following steps:1) it measures water in certain municipal sewage plant urban life and meets reuse standard;2) denitrogenation processing is carried out to municipal middle water, the municipal middle water after denitrogenation directly gets to the new water tank of iron and steel enterprise, and municipal sewage plant processing front end is transported to using the pretreatment water outlet of sewage treatment plant of iron and steel enterprise as displacement water;3) water enters iron and steel enterprise's advanced treatment system and is handled in the urban life of displacement;4) the middle water water replaced according to how much settings of certain iron and steel enterprise's underground water water consumption.Advantage is:Preferable water-saving and emission-reducing effect is achieved, not only solves that iron and steel enterprise circulation salt content is high, problem of fluctuation of service, also reduces new water magnitude of recruitment and efflux wastewater amount.

Description

A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works
Technical field
The present invention relates to a kind of urban life Treated sewage reusing in the method for integrated iron and steel works.
Background technology
At present, water scarcity crisis has become the great resource that numerous countries are faced in policy, economic and technical Environmental problem, water resources crisis is more and more severeer, and prospect is troubling.The approach for solving shortage of water resources predicament is mainly increased income With two kinds of throttling, throttling is exactly to improve the measures such as production technology and carry out using water wisely using taking, and increase income be exactly searching can be at certain A little aspects substitute the water source of water function.Water has big amount, water stabilization, the spy not influenced by factors such as seasons in urban life Point is reliable Ecology.These sewage resources pass through suitable regeneration treatment, are back to the use not high to water quality requirement Family can not only reduce the consumption of fresh water resource and the discharge capacity of sewage, and can save production cost and environmental protection, It can reach resource environment two-win.
Industrial water is urban water rich and influential family, and steel and iron industry is water consumption and blowdown rich and influential family in industrial circle, is consumed Water accounts for about the 14% of national industrial water consume,《The 12nd five-year-plan outline of national economy and social development》Regulation, unit Industrial added value water consumption needs reduction by 30%, while Ministry of Water Resources represents a few days ago, " from now on it is possible that key area with water rich and influential family Water total amount control is carried out, after target water use, newly-increased water can only pass through water right definition and the non-traditional water source of use Meet ", therefore, the replacement water source for finding industrial fresh water is extremely urgent.
Iron and steel enterprise's water about more than 80% be cooling water, by type of cooling difference be divided into net circulation cooling water system and Turbid recirculating cooling water system.There are two types of forms for net circulation cooling water system:Enclosed Type Circulating Cooling Water System and open type cycle The net ring cooling water system of cooling water system, wherein open type be using a kind of most wide mode, be present in coking, oxygen processed, sintering, Each process such as blast furnace, steel-making, steel rolling and thermoelectricity.After Reusability, water temperature constantly increases recirculated water, various ions in water Concentration increases, high power concentration, while can generate a series of physical chemical change, causes pipe-line system corrosion and scaling serious, influences Equipment normal operation.
Its scaling cause is analyzed, mainly due to the raising of water temperature, the hardness such as calcium carbonate, magnesium carbonate in recirculated cooling water Salt, solubility are reduced with the raising of temperature, water temperature more higher easier precipitation, while molecule activity is also with temperature Rising it is all the more active, the attachment speed of incrustation scale is also higher.It is followed in conclusion must be added to industrial fresh water (purified water) to reduce Ring water salt content, avoids pipeline heavy corrosion, it is ensured that system normal operation.Industrial fresh water (purified water) group that Anshan iron and steel plant adds at present Into predominantly three parts:Underground water, Dahuofang water inlet and advanced treatment system water inlet, considerably increase ton steel and consume new water, no The system cycles of concentration of rule also increases quantity of wastewater effluent, not only uneconomical but also not environmentally, therefore, finds and substitutes water source, be to follow The water-saving effective way of ring water system.
Invention content
In order to overcome the deficiencies of the prior art, combine the object of the present invention is to provide a kind of urban life Treated sewage reusing in steel Water in urban life and steel and iron industry purified water are replaced, integrated iron and steel works' circulation are made to reach stable operation by enterprise State, optimize circulation.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of urban life Treated sewage reusing includes the following steps in the method for integrated iron and steel works:
1) it measures water in certain municipal sewage plant urban life and meets reuse standard:pH:6-7、COD<50mg/L, ammonia nitrogen <2mg/L, nitrate nitrogen<70mg/L, total nitrogen<70mg/L, conductivity<1500us/cm;
2) denitrogenation processing being carried out to municipal middle water, the municipal middle water after denitrogenation directly gets to the new water tank of iron and steel enterprise, Improve the water quality of new water system with this, municipal wastewater is transported to using the pretreatment water outlet of sewage treatment plant of iron and steel enterprise as displacement water Treatment plant handles front end, qualified discharge after processing;
3) water enters iron and steel enterprise's advanced treatment system and is handled in the urban life of displacement, the initialization system reaction time 0.5-1h, regulating system pH value 7-8;Advanced treatment system is handled using " ultrafiltration+reverse osmosis " bimodulus method, in ultrafiltration system use The full filtration Ultrafiltration film of pressure type, more than the 90% ultrafiltration system rate of recovery, reverse osmosis more than 75% rate of recovery are discharged COD after processing< 50mg/L, total nitrogen<10mg/L;
4) the middle water water replaced according to how much settings of certain iron and steel enterprise's underground water water consumption, underground water water consumption is with putting The difference of middle water water changed is within 500t/h, to achieve the purpose that reduce to mining of groundwater.
Compared with prior art, the beneficial effects of the invention are as follows:
Urban life Treated sewage reusing achieves preferable water-saving and emission-reducing effect, not only solves in the method for integrated iron and steel works Jue Liao iron and steel enterprises circulation salt content is high, the problem of fluctuation of service, also reduces new water magnitude of recruitment and efflux wastewater Amount makes iron and steel enterprise's entirety ton steel consume new water and progressively reaches international most advanced level, while protect groundwater source, improves steel Production, life and the surrounding enviroment of integrated complex.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Fig. 2 is advanced treating flow chart.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings of the specification, it should be noted that the implementation of the present invention is unlimited In following embodiment.
See Fig. 1, a kind of urban life Treated sewage reusing includes the following steps in the method for integrated iron and steel works:
1) it measures water in certain municipal sewage plant urban life and meets reuse standard:pH:6-7、COD<50mg/L, ammonia nitrogen <2mg/L, nitrate nitrogen<70mg/L, total nitrogen<70mg/L, conductivity<1500us/cm;
2) denitrogenation processing being carried out to municipal middle water, the municipal middle water after denitrogenation directly gets to the new water tank of steel plant, with This improves the water quality of new water system, and municipal dirt is transported to using the pretreatment water outlet of sewage treatment plant of integrated iron and steel works as displacement water Water treatment plant handles front end, qualified discharge after processing;
3) see Fig. 2, certain integrated iron and steel works' advanced treatment system is handled using " ultrafiltration+reverse osmosis " bimodulus method, ultrafiltration system System is gone out using the full filtration Ultrafiltration film of inner pressed, more than the 90% ultrafiltration system rate of recovery, reverse osmosis more than 75% rate of recovery after processing Water COD<50mg/L, total nitrogen<10mg/L;Water enters iron and steel enterprise's advanced treatment system and is handled in the urban life of displacement, Initialization system reaction time 0.5-1h, regulating system pH value 7-8;
4) the middle water water replaced according to how much settings of certain iron and steel enterprise's underground water water consumption, underground water water consumption is with putting The difference of middle water water changed is within 500t/h, to achieve the purpose that reduce to mining of groundwater.
Embodiment 1:
Urban life Treated sewage reusing is in the method for integrated iron and steel works:
See Fig. 1, carry out investigation comprehensively to certain municipal sewage plant, show that big, water quality is steady with measuring for water in urban life Fixed, the characteristics of not influenced by factors such as seasons, water water quality in measure:PH, COD, ammonia nitrogen, nitrate nitrogen, total nitrogen and conductivity, detection The conductivity of middle water is in the range of 1000 ± 20us/cm.And measure the electricity being discharged after certain integrated iron and steel works' Sewage advanced treatment Conductance illustrates that two kinds of water has the basis of displacement in 2000 ± 20us/cm ranges, can be into line replacement.Certain wastewater of steel industry 9300t/h, after grid, the pretreatment of materialization stage, 1500t/h enters municipal sewage plant processing front end and is handled, 6900t/h supplies clean circulating water system, and remaining water enters advanced treatment system with water in the 1500t/h of displacement and carries out depth together Reason is shown in Fig. 2, reaction time 0.5h, and regulating system pH value is 7, and water outlet is drained into industrial fresh water tank as industrial fresh water and treats With.Clean circulating water water stabilization after displacement has achieved the purpose that the new water magnitude of recruitment of reduction and efflux wastewater amount.
Embodiment 2
Urban life Treated sewage reusing is as follows in the method for integrated iron and steel works:
See Fig. 1, carry out investigation comprehensively to certain municipal sewage plant, show that big, water quality is steady with measuring for water in urban life Fixed, the characteristics of not influenced by factors such as seasons, water water quality in measure:PH, COD, ammonia nitrogen, nitrate nitrogen, total nitrogen and conductivity, detection The conductivity of middle water measures the electricity being discharged after certain integrated iron and steel works' Sewage advanced treatment in the range of 1000 ± 20us/cm Conductance illustrates that two kinds of water has the basis of displacement in 2000 ± 20us/cm ranges, can be into line replacement.Certain wastewater of steel industry After grid, the pretreatment of materialization stage, 2000t/h enters municipal sewage plant processing front end and is handled 8300t/h, 5900t/h supplies clean circulating water system, and remaining water enters advanced treatment system with water in the 2000t/h of displacement and carries out depth together Reason, reaction time 1h, regulating system pH value are 7, and it is for use that water outlet as industrial fresh water is drained into tank.Clean circulating water water after displacement Matter is stablized, and has achieved the purpose that the new water magnitude of recruitment of reduction and efflux wastewater amount.
Embodiment 3
Urban life Treated sewage reusing is as follows in the method for integrated iron and steel works:
See Fig. 1, carry out investigation comprehensively to certain municipal sewage plant, show that big, water quality is steady with measuring for water in urban life Fixed, the characteristics of not influenced by factors such as seasons, water water quality in measure:PH, COD, ammonia nitrogen, nitrate nitrogen, total nitrogen and conductivity, detection The conductivity of middle water measures the electricity being discharged after certain integrated iron and steel works' Sewage advanced treatment in the range of 1000 ± 20us/cm Conductance illustrates that two kinds of water has the basis of displacement in 2000 ± 20us/cm ranges, can be into line replacement.Certain wastewater of steel industry After grid, the pretreatment of materialization stage, 2500t/h enters municipal sewage plant processing front end and is handled 9600t/h, 6000t/h supplies clean circulating water system, and remaining water enters advanced treatment system with water in the 2500t/h of displacement and carries out depth together Reason, reaction time 1h, regulating system pH value are 8, and it is for use that water outlet as industrial fresh water is drained into tank.Clean circulating water water after displacement Matter is stablized, and has achieved the purpose that the new water magnitude of recruitment of reduction and efflux wastewater amount.
The results are shown in Table 1 for industrial fresh water water quality detection before and after middle water and displacement, the results showed that, displacement ratio is different, Postindustrial new water water quality difference is replaced, i.e.,:When replaced water (1500-2500t/h) is bigger, clean circulating water water quality detection result It is better, but accordingly increased nitrogen content.Consider, the conductivity 980-1020us/cm of water in urban life, and certain steel The conductivity 1980-2020us/cm being discharged after iron integrated complex Sewage advanced treatment, therefore, to ensure relatively low conductivity Postindustrial new water nitrogen content is replaced in 1000-1500us/cm or so and reduction, determines that effect is best when replaced water is 2000t/h, I.e. embodiment 2 is optimum embodiment, and this method effectively improves the water quality of the new water system of certain integrated iron and steel works, reduces The conductivity of industrial fresh water.
1 each embodiment water quality detection result of table
Urban life Treated sewage reusing achieves preferable water-saving and emission-reducing effect, not only solves in the method for integrated iron and steel works Jue Liao iron and steel enterprises circulation salt content is high, the problem of fluctuation of service, also reduces new water magnitude of recruitment and efflux wastewater Amount makes iron and steel enterprise's entirety ton steel consume new water and progressively reaches international most advanced level, while protect groundwater source, improves steel Production, life and the surrounding enviroment of integrated complex.

Claims (1)

1. a kind of urban life Treated sewage reusing is in the method for integrated iron and steel works, which is characterized in that includes the following steps:
1) it measures water in certain municipal sewage plant urban life and meets reuse standard:pH:6-7、COD<50mg/L, ammonia nitrogen< 2mg/L, nitrate nitrogen<70mg/L, total nitrogen<70mg/L, conductivity<1500us/cm;
2) denitrogenation processing is carried out to municipal middle water, the municipal middle water after denitrogenation directly gets to the new water tank of iron and steel enterprise, with this Improve the water quality of new water system, municipal wastewater processing is transported to using the pretreatment water outlet of sewage treatment plant of iron and steel enterprise as displacement water Factory and office manage front end, qualified discharge after processing;
3) water enters iron and steel enterprise's advanced treatment system and is handled in the urban life of displacement, initialization system reaction time 0.5- 1h, regulating system pH value 7-8;Advanced treatment system is handled using " ultrafiltration+reverse osmosis " bimodulus method, and ultrafiltration system uses inner pressed Full filtration Ultrafiltration film, more than the 90% ultrafiltration system rate of recovery, reverse osmosis more than 75% rate of recovery are discharged COD after processing<50mg/ L, total nitrogen<10mg/L;
4) the middle water water replaced according to how much settings of certain iron and steel enterprise's underground water water consumption, underground water water consumption and displacement The difference of middle water water is within 500t/h, to achieve the purpose that reduce to mining of groundwater.
CN201810147763.7A 2018-02-13 2018-02-13 A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works Pending CN108218007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810147763.7A CN108218007A (en) 2018-02-13 2018-02-13 A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810147763.7A CN108218007A (en) 2018-02-13 2018-02-13 A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works

Publications (1)

Publication Number Publication Date
CN108218007A true CN108218007A (en) 2018-06-29

Family

ID=62661758

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810147763.7A Pending CN108218007A (en) 2018-02-13 2018-02-13 A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works

Country Status (1)

Country Link
CN (1) CN108218007A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102206020A (en) * 2011-05-03 2011-10-05 中冶赛迪工程技术股份有限公司 Zero-emission comprehensive treatment process and system for waste water from whole plant of steelmaking enterprise
CN203529959U (en) * 2013-08-13 2014-04-09 陕西钢铁集团有限公司 Separate-quality cascade water replenishment and drainage and circulating water conservation system of iron and steel enterprise
CN203700070U (en) * 2013-12-11 2014-07-09 北京志能祥赢节能环保科技有限公司 Device for mixing and recycling steel waste water and municipal sewage
CN105271623A (en) * 2015-11-26 2016-01-27 东北大学 System and process for recycling urban recycled water and steel wastewater in iron and steel enterprises through combined grading
CN205241450U (en) * 2015-11-26 2016-05-18 东北大学 City normal water and steel wastewater be retrieval and utilization in system of iron and steel enterprise in grades jointly
CN106745966A (en) * 2016-12-01 2017-05-31 江苏蓝天环保集团股份有限公司 A kind of steel wastewater and the device of municipal wastewater mixed regeneration reuse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102206020A (en) * 2011-05-03 2011-10-05 中冶赛迪工程技术股份有限公司 Zero-emission comprehensive treatment process and system for waste water from whole plant of steelmaking enterprise
CN203529959U (en) * 2013-08-13 2014-04-09 陕西钢铁集团有限公司 Separate-quality cascade water replenishment and drainage and circulating water conservation system of iron and steel enterprise
CN203700070U (en) * 2013-12-11 2014-07-09 北京志能祥赢节能环保科技有限公司 Device for mixing and recycling steel waste water and municipal sewage
CN105271623A (en) * 2015-11-26 2016-01-27 东北大学 System and process for recycling urban recycled water and steel wastewater in iron and steel enterprises through combined grading
CN205241450U (en) * 2015-11-26 2016-05-18 东北大学 City normal water and steel wastewater be retrieval and utilization in system of iron and steel enterprise in grades jointly
CN106745966A (en) * 2016-12-01 2017-05-31 江苏蓝天环保集团股份有限公司 A kind of steel wastewater and the device of municipal wastewater mixed regeneration reuse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
邓平: "利用市政再生水降低钢铁企业新水消耗", 《工业水处理》 *

Similar Documents

Publication Publication Date Title
CN104692525A (en) Continuous-flow integrated device and continuous-flow integrated method for simultaneous removal of nitrate nitrogen and ammonia nitrogen
JP5148550B2 (en) Anaerobic treatment method and apparatus provided with evaporative concentration means for methane fermentation treated water
CN105439358A (en) Method and device for realizing zero discharge of desulfurization wastewater
Zhi et al. Hardness removal by a novel electrochemical method
CN103739143A (en) Beer wastewater treatment technology
CN104291529A (en) Device and method for treating high-concentration nitrate wastewater and urban sewage by partial denitrification and anaerobic ammonia oxidation
CN102001776B (en) Method and device for recycling organic wastewater with high salinity
Yan et al. Pilot-scale test of an advanced, integrated wastewater treatment process with sludge reduction, inorganic solids separation, phosphorus recovery, and enhanced nutrient removal (SIPER)
CN105481179A (en) Concentrated salt sewage zero-discharge treatment method
CN104710054A (en) Zero-emission desalting system
Hu et al. Study of the development and performance of centralized wastewater treatment plants in Chinese industrial parks
CN204607769U (en) A kind of desalination Zero discharging system
CN106884458A (en) The collocation method and system of a kind of industrial fresh water
CN108218007A (en) A kind of urban life Treated sewage reusing is in the method for integrated iron and steel works
CN101560041A (en) Electroplating wastewater treatment method combining biochemical method and decomplexation method
CN106477766A (en) A kind of waste electroplating liquor containing chromium processing method
CN101597128B (en) Method for treating electroplating wastewater by complex breaking
CN101597129B (en) Method for biochemically treating electroplating wastewater
CN203922952U (en) Sewage treatment systems
CN202379830U (en) Treatment device for coking wastewater
Zheng et al. Optimization of urban wastewater treatment plants process with low C/N ratio
CN105366889A (en) High-standard urban sewage nitrogen and phosphorus removal system without external carbon sources
CN210048616U (en) Plasma sewage purification device
CN210711128U (en) Flue gas desulfurization denitration system acid waste water recycling system
CN207361980U (en) The special purpose device of vanadium-containing water technique of zero discharge

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination