CN104291522A - Method for treating industrial wastewater - Google Patents

Method for treating industrial wastewater Download PDF

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Publication number
CN104291522A
CN104291522A CN201410471001.4A CN201410471001A CN104291522A CN 104291522 A CN104291522 A CN 104291522A CN 201410471001 A CN201410471001 A CN 201410471001A CN 104291522 A CN104291522 A CN 104291522A
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Prior art keywords
water
oil
reaction
treatment
pool
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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
CN201410471001.4A
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Chinese (zh)
Inventor
王志忠
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TIANJIN QIANXIN NON-FERROUS METALS Co Ltd
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TIANJIN QIANXIN NON-FERROUS METALS Co Ltd
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Priority to CN201410471001.4A priority Critical patent/CN104291522A/en
Publication of CN104291522A publication Critical patent/CN104291522A/en
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    • 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
    • C02F1/20Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/40Devices for separating or removing fatty or oily substances or similar floating material
    • 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
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • 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
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209Regulation methods for flocculation or precipitation
    • 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
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes

Abstract

The invention discloses a method for treating industrial wastewater. The method is characterized by comprising the following steps: performing precipitation reaction, performing oil removal treatment, performing blow-off treatment, performing coagulation reaction, performing anaerobic hydrolysis reaction, performing anaerobic reaction, performing aerobic biological reaction, performing ultrafiltration, performing nanofiltration and absorbing. The method disclosed by the invention can be used for synchronously and effectively removing nutrient elements such as carbon-containing organic pollutants as well as nitrogen and phosphor, wherein the N-NH3 concentration of outlet water is almost kept to be lower than 5mg/L, the average removal rate is 90.6%, the average removal rate of total phenols is 87.8%, the average removal rate of COD (chemical oxygen demand) is 80.6%, and the average removal rate of chromaticity is 45.6%. The method disclosed by the invention does not need complicated pretreatment equipment, occupies a small space, is low in investment cost of a sewage treatment project and capable of effectively pre-treating and deeply treating petrochemical wastewater and also recycling and utilizing the industrial wastewater, and thus the water resources are saved and the economic and environmental benefits are good.

Description

A kind of method for the treatment of trade effluent
Technical field
The invention belongs to water-treatment technology field, relate generally to a kind of method for the treatment of trade effluent.
Background technology
Along with the fast development of economy, aluminium alloy compression casting industry also achieves the development of leap, and aluminium alloy is in the widespread use of automobile, motor.But exist in Die Casting Industry problems need solve and a difficult problem need overcome.Such as realize the energy-saving and emission-reduction of technique, the pollution at utmost reduced environment to the greatest extent; Optimization technological process, realizes optimization production.Due in the extrusion process process of aluminium alloy, principal pollutant are industrial wastewater pollutions of releasing agent and oils.Releasing agent is used in a large number in die casting operation, the component of releasing agent is mainly mineral oil and the organic substance of emulsification, after releasing agent is sprayed on die casting, a part of formation barrier film, a part is discharged as trade effluent, and the waste water of discharging contains emulsification oil and the organic matter's, and the evaporating, emitting, dripping or leaking of liquid or gas of pressure die-casting machine lubricating oil and other oils, also cause containing oils in trade effluent, COD value is increased.For this kind of trade effluent, need to focus on, removing oil-containing, improve water oxygen level, alleviating the impact of organic substance on COD value, is realize environmentally friendly ground explained hereafter.
Summary of the invention
For problem described above, make full use of water resources, reduce trade effluent to the pollution of environment, the object of this invention is to provide a kind of method for the treatment of trade effluent.
For the treatment of a method for trade effluent, it is characterized in that, the method comprises the following steps:
1. first pending oil-containing and organic trade effluent are entered centralized pool, carry out collection and treatment;
2. again the trade effluent in centralized pool is entered settling tank, carry out mud-water separation, supernatant liquid overflows to oil trap, and in settling tank, lower floor's mud is back to centralized pool through sludge reflux pump;
3. supernatant liquid is entered oil trap, carry out oil removal process, oil trap doubles as preliminary sedimentation tank simultaneously, removes the settleable matters such as coarse particles, alleviates the consumption of subsequent disposal flocculation agent, and adopt sloping plate oil separation tank, the organism that wherein oil removal obtains enters oil recovery pond;
4. the waste water after oil removal carries out stripping process, by regulating waste water ph, control water temperature, cloth Water l oad and vapour-liquid ratio, ammonia nitrogen shifts from liquid phase to gas phase thus reduces the ammonia-nitrogen content waste water by the physical action of air or steam stripping, and the optimal conditions of its stripping process is: during water temperature 25 DEG C, pH=10 ~ 12, during vapour-liquid ratio 3000-3800, the ammonia aeration rate being greater than 90% can be obtained, and under ammonia nitrogen in high density condition, ammonia aeration rate and initial ammonia nitrogen relation little;
5. the waste water carrying out stripping process enters coagulation reaction tank, opens coagulation basin impeller and carries out coagulating; Add suitable flocculation agent and coagulant aids, thus form floss in sewage, through absorption, build bridge, neutralization and the effect such as embedding be except the pollution substance in anhydrating.The flocculation agent that can adopt is inorganic flocculating agent and microbial flocculant; Conventional inorganic coagulant is aluminium salt and molysite, as aluminium chlorohydroxide, Tai-Ace S 150, iron trichloride and ferrous sulfate; Coagulant aids is polyacrylamide (PAM); The coagulation time is 40 ~ 60min;
6. the waste water through coagulating treatment is entered air flotation pool, with alkali, air supporting pool inner water pH value is adjusted between 7 ~ 8; Alkali can be one in potassium hydroxide, sodium hydroxide or calcium oxide or its mixture, and in air flotation pool, upper strata floating matter can be back to coagulation reaction tank and continues to use;
7. upper strata clear water after filtering enters anaerobic hydrolysis pond, starts impeller circulation stirring in anaerobic hydrolysis pond;
8. the water in supernatant liquid pool enters anaerobic reactor, and enter in aerobic reaction pond after anaerobic reaction, water carries out ultrafiltration, nanofiltration again after aerobic reaction, water after nanofiltration process enters activated carbon adsorption tank, after charcoal absorption, enter outlet sump, obtain the trade effluent after processing, stand-by.Anaerobism optimum experimental condition is the residence time is 21h, mixed genetic-neural network (MLSS) 159/L, and leave standstill 6h, at aerobic stage, optimum aeration time is 9h.
Compared with the existing technology advantage of the present invention is:
The present invention adopts charcoal absorption to be a kind of porousness carbonaceous material, and adsorption, can also serve as filler, forms film, for microorganism growth provides Space, Place on its surface.Also because Powdered Activated Carbon has huge specific surface area; This Technology is once come into operation simultaneously, and flooding quantity change fluctuation can not affect the stability of operation to a great extent, and construction investment is low, and do not need complicated pre-processing device, floor space is relatively little, and sewage treatment project investment cost is low; Applied widely, except the pretreatment and advanced treatment that can be used for petrochemical wastewater, the pretreatment and advanced treatment of the waste water such as papermaking, pharmacy, some fine chemical industry can also be used for; The present invention can reclaim trade effluent and utilize, and has saved water resources, and have good economy and environment benefit, the trade effluent after process is of many uses, can be applied in industrial links.
Embodiment
For the treatment of a method for trade effluent, it is characterized in that, the method comprises the following steps:
1. first pending oil-containing and organic trade effluent are entered centralized pool, carry out collection and treatment;
2. again the trade effluent in centralized pool is entered settling tank, carry out mud-water separation, supernatant liquid overflows to oil trap, and in settling tank, lower floor's mud is back to centralized pool through sludge reflux pump;
3. supernatant liquid is entered oil trap, carry out oil removal process, oil trap doubles as preliminary sedimentation tank simultaneously, removes the settleable matters such as coarse particles, alleviates the consumption of subsequent disposal flocculation agent, and adopt sloping plate oil separation tank, the organism that wherein oil removal obtains enters oil recovery pond;
4. the waste water after oil removal carries out stripping process, during water temperature 25 DEG C, pH=10 ~ 12, during vapour-liquid ratio 3000-3800, can obtain the ammonia aeration rate being greater than 90%, ammonia nitrogen shifts from liquid phase to gas phase thus reduces the ammonia-nitrogen content waste water by the physical action of air or steam stripping;
5. the waste water carrying out stripping process enters coagulation reaction tank, opens coagulation basin impeller and carries out coagulating; Add suitable microbial flocculant and polyacrylamide (PAM) coagulant aids, thus form floss in sewage, through absorption, build bridge, neutralization and the effect such as embedding except the pollution substance in anhydrating, the coagulation time is 60min;
6. the waste water through coagulating treatment is entered air flotation pool, be adjusted between 7 ~ 8 with sodium hydroxide by air supporting pool inner water pH value, in air flotation pool, upper strata floating matter can be back to coagulation reaction tank continuation use;
7. upper strata clear water after filtering enters anaerobic hydrolysis pond, starts impeller circulation stirring in anaerobic hydrolysis pond;
8. the water in supernatant liquid pool enters anaerobic reactor, and enter in aerobic reaction pond after anaerobic reaction, water carries out ultrafiltration, nanofiltration again after aerobic reaction, water after nanofiltration process enters activated carbon adsorption tank, after charcoal absorption, enter outlet sump, obtain the trade effluent after processing, stand-by.Experimental anaerobic condition is the residence time is 21h, mixed genetic-neural network (MLSS) 159/L, and leave standstill 6h, clearance reaches 38.6%, and the clearance of ammonia nitrogen reaches 14.7%, and the clearance of total phenol is 40%.At aerobic stage, optimum aeration time is that 9h, COD average removal rate reaches 80.6%, SBR aerobic reactor water outlet N-NH 3concentration maintains below 5mg/L substantially, clearance average out to 90.6%, and the average removal rate of total phenol is 87.8%, and the average removal rate of colourity reaches 45.6%.

Claims (2)

1. for the treatment of a method for trade effluent, it is characterized in that, the method comprises the following steps:
1) first pending oil-containing and organic trade effluent are entered centralized pool, carry out collection and treatment;
2) again the trade effluent in centralized pool is entered settling tank, carry out mud-water separation, supernatant liquid overflows to oil trap, and in settling tank, lower floor's mud is back to centralized pool through sludge reflux pump;
3) supernatant liquid is entered oil trap, carry out oil removal process, adopt sloping plate oil separation tank, the organism that wherein oil removal obtains enters oil recovery pond;
4) waste water after oil removal carries out stripping process, by regulating waste water ph, controls water temperature, cloth Water l oad and vapour-liquid ratio, the optimal conditions of its stripping process is: during water temperature 25 DEG C, pH=10 ~ 12, during vapour-liquid ratio 3000-3800, can obtain the ammonia aeration rate being greater than 90%;
5) waste water carrying out stripping process enters coagulation reaction tank, opens coagulation basin impeller and carries out coagulating; Add suitable flocculation agent and coagulant aids, the flocculation agent that can adopt is inorganic flocculating agent or microbial flocculant; Coagulant aids is polyacrylamide (PAM); The coagulation time is 40 ~ 60min;
6) waste water through coagulating treatment is entered air flotation pool, with alkali, air supporting pool inner water pH value is adjusted between 7 ~ 8; Alkali can be one in potassium hydroxide, sodium hydroxide or calcium oxide or its mixture, and in air flotation pool, upper strata floating matter can be back to coagulation reaction tank and continues to use;
7) upper strata clear water after filtering enters anaerobic hydrolysis pond, starts impeller circulation stirring in anaerobic hydrolysis pond;
8) water in supernatant liquid pool enters anaerobic reactor, and enter in aerobic reaction pond after anaerobic reaction, water carries out ultrafiltration, nanofiltration again after aerobic reaction, water after nanofiltration process enters activated carbon adsorption tank, after charcoal absorption, enter outlet sump, obtain the trade effluent after processing, stand-by.
2. want a kind of method for the treatment of trade effluent described in 1 according to right, it is characterized in that, the conventional inorganic flocculating agent of described step (5) is aluminium salt or molysite, as aluminium chlorohydroxide, Tai-Ace S 150, iron trichloride and ferrous sulfate, wherein any one.
CN201410471001.4A 2014-09-16 2014-09-16 Method for treating industrial wastewater Pending CN104291522A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105174661A (en) * 2015-10-30 2015-12-23 太仓东能环保设备有限公司 Acid-pickled phosphatized wastewater treatment process
CN105236670A (en) * 2015-09-24 2016-01-13 天津中天精科科技有限公司 Biological reaction and adsorption water purifying device used for waste water treatment
CN105776751A (en) * 2016-04-13 2016-07-20 太原理工大学 Process for efficient separation of organic carbon source in sewage and energy development and utilization
CN105906150A (en) * 2016-06-06 2016-08-31 李丹丹 Sewage treatment system and technology for river ways in city
CN108341545A (en) * 2017-01-22 2018-07-31 东莞新科技术研究开发有限公司 The processing method of industrial wastewater
CN109133488A (en) * 2017-06-16 2019-01-04 江苏立业环境科技有限公司 A kind for the treatment of process of petroleum wastewater
CN111943230A (en) * 2020-06-29 2020-11-17 杭州天创环境科技股份有限公司 Recycling treatment method for industrial wastewater byproduct salt

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CN102295389A (en) * 2011-08-03 2011-12-28 句容宁武新材料发展有限公司 Industrial waste water treating technology
CN202754863U (en) * 2012-08-21 2013-02-27 上海东硕环保科技有限公司 Efficient device used for treating and recycling of high-salty waste water
CN103011529A (en) * 2012-12-07 2013-04-03 常州大学 Industrial wastewater treatment technology
CN103496825A (en) * 2013-09-27 2014-01-08 苏州国环环境检测有限公司 Three-phase biological fluidized bed A/O/O process for treating coking wastewater
CN203582639U (en) * 2013-10-26 2014-05-07 陕西华陆化工环保有限公司 Petrochemical wastewater treatment system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101870536A (en) * 2009-04-25 2010-10-27 抚顺矿业集团有限责任公司 Oil shale destructive distillation sewage treatment process
CN102295389A (en) * 2011-08-03 2011-12-28 句容宁武新材料发展有限公司 Industrial waste water treating technology
CN202754863U (en) * 2012-08-21 2013-02-27 上海东硕环保科技有限公司 Efficient device used for treating and recycling of high-salty waste water
CN103011529A (en) * 2012-12-07 2013-04-03 常州大学 Industrial wastewater treatment technology
CN103496825A (en) * 2013-09-27 2014-01-08 苏州国环环境检测有限公司 Three-phase biological fluidized bed A/O/O process for treating coking wastewater
CN203582639U (en) * 2013-10-26 2014-05-07 陕西华陆化工环保有限公司 Petrochemical wastewater treatment system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105236670B (en) * 2015-09-24 2018-08-03 宁夏锐盛明杰知识产权咨询有限公司 A kind of sewage disposal biological respinse and absorption purifier
CN105236670A (en) * 2015-09-24 2016-01-13 天津中天精科科技有限公司 Biological reaction and adsorption water purifying device used for waste water treatment
CN108585363A (en) * 2015-09-24 2018-09-28 天津中天精科科技有限公司 A kind of sewage disposal biological respinse and absorption purifier
CN105174661B (en) * 2015-10-30 2018-02-02 太仓东能环保设备有限公司 A kind of acid washing phosphorization waste water treatment process
CN105174661A (en) * 2015-10-30 2015-12-23 太仓东能环保设备有限公司 Acid-pickled phosphatized wastewater treatment process
CN105776751A (en) * 2016-04-13 2016-07-20 太原理工大学 Process for efficient separation of organic carbon source in sewage and energy development and utilization
CN105906150A (en) * 2016-06-06 2016-08-31 李丹丹 Sewage treatment system and technology for river ways in city
CN108341545A (en) * 2017-01-22 2018-07-31 东莞新科技术研究开发有限公司 The processing method of industrial wastewater
CN109133488A (en) * 2017-06-16 2019-01-04 江苏立业环境科技有限公司 A kind for the treatment of process of petroleum wastewater
CN111943230A (en) * 2020-06-29 2020-11-17 杭州天创环境科技股份有限公司 Recycling treatment method for industrial wastewater byproduct salt

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Application publication date: 20150121