CN102115295B - Electroplating waste water high-efficiency combined biochemical treatment technique - Google Patents

Electroplating waste water high-efficiency combined biochemical treatment technique Download PDF

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Publication number
CN102115295B
CN102115295B CN201010620890A CN201010620890A CN102115295B CN 102115295 B CN102115295 B CN 102115295B CN 201010620890 A CN201010620890 A CN 201010620890A CN 201010620890 A CN201010620890 A CN 201010620890A CN 102115295 B CN102115295 B CN 102115295B
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waste water
efficiently
electroplating wastewater
biochemical
biochemical processing
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CN102115295A (en
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张金华
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ZHEJIANG PINGHU GREEN ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
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ZHEJIANG PINGHU GREEN ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
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Abstract

The invention provides an electroplating waste water high-efficiency combined biochemical treatment technique, which comprises: degrading waste water of which the heavy metal ion content reaches a standard in a high-efficiency biochemical combined pool, separating sludge and water in a secondary settling pool, performing oxidization and microflocculation reactions in an oxidization and microflocculation pool, filtering in a filter, and recycling or emitting in a recycling and emitting pool. In the invention, electroplating comprehensive waste water can be treated effectively, so all pollution indexes of the effluent reach special emission limit standards in Emission Standards for Electroplating Pollutants GB 21900-2008.

Description

Electroplating wastewater efficiently makes up biochemical processing
Technical field
The present invention relates to the preceding advanced treatment of electroplating wastewater discharging, be specifically related to electroplating wastewater and efficiently make up biochemical processing.
Background technology
Since the issuing and implementation of " plating pollutant emission standard " GB 21900-2008 new standard, the original traditional waste water treatment facility of numerous electroplating industry enterprises can't satisfy the requirement of new standard, is all exploring and seeking cost-effective treatment process.Electroplating wastewater is many because of electroplating technology, the waste water composition is comparatively complicated, except that containing all kinds of heavy metal contamination indexs, also has organic pollutant COD, trophicity index NH 3Indexs such as-N, total nitrogen, total phosphorus, at present a lot of electroplating enterprises all do not have effective treatment process to this.
Summary of the invention
Technical problem to be solved by this invention is to provide electroplating wastewater efficiently to make up biochemical processing; Can handle electroplating integrated waste water effectively, make its each item contamination index all reach the special emission limit standard among " plating pollutant emission standard " GB21900-2008.
For solving above-mentioned existing technical problem; The present invention adopts following scheme: electroplating wastewater efficiently makes up biochemical processing; Heavy metal ion waste water up to standard through the second pond mud-water separation, carries out the little flocculation reaction of oxidation through the little flocculation basin of peroxo-again after efficient biochemical combination pond degraded; Refilter to strainer then, get into reuse of reuse blowoff basin or discharging at last.
As preferably; Flow into efficient biochemical combination Chi Zhonghou at heavy metal ion waste water up to standard in the said degradation process; Through adding microbial nutrient solution; Control DO, MLSS, biological iron level make efficient biochemistry make up the obligate Pseudomonas with suspending that adheres in the pond and utilize the organism in the abundant degrading waste water of self metabolism.
As preferably, said DO is 2~4mg/L.
As preferably, said MLSS is 2.5~3.5g/L.
As preferably, said biological iron level is 100~150mg/L.
As preferably, through adding oxygenant and polymeric flocculant, make that the organic pollutant in the waste water further purifies and flocculation in the little flocculation reaction process of said oxidation.
As preferably, said oxygenant is a dioxide peroxide.Oxidation effectiveness is good.
Beneficial effect:
The present invention provides electroplating wastewater efficiently to make up biochemical processing; Can handle the organic pollutant and the nutrient pollutant of electroplating integrated waste water effectively, make its each item contamination index all reach the special emission limit standard among " plating pollutant emission standard " GB 21900-2008.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Embodiment
As shown in Figure 1; Electroplating wastewater efficiently makes up biochemical processing; Heavy metal ion waste water up to standard through the second pond mud-water separation, carries out the little flocculation reaction of oxidation through the little flocculation basin of peroxo-again after efficient biochemical combination pond degraded; Refilter to strainer then, get into reuse of reuse blowoff basin or discharging at last.Flow into efficient biochemical combination Chi Zhonghou at heavy metal ion waste water up to standard in the said degradation process; Through adding microbial nutrient solution; Control DO, MLSS, biological iron level make the obligate Pseudomonas with suspending that adheres to utilize the organism in the abundant degrading waste water of self metabolism.Said DO is 2~4mg/L.Said MLSS is 2.5~3.5g/L.Said biological iron level is 100~150mg/L.Through adding oxygenant and polymeric flocculant, make that the organic pollutant in the waste water further purifies and flocculation in the little flocculation reaction process of said oxidation.Said oxygenant is a dioxide peroxide.
DO is meant dissolved oxygen, promptly is dissolved in the amount of oxygen in the water, with oxygen in every premium on currency the milligram numerical table show.MLSS is writing a Chinese character in simplified form of mixed liquor suspended solid, MLSS concentration, and it is called the mixed solution sludge concentration again, its expression be the gross weight (mg/L) of the active sludge solids that in the unit volume mixed solution of aeration tank, contained.
After second pond 2 mud-water separation, water outlet COD CrValue reduces greatly, and up to more than 80%, water outlet CODcr is generally about 50mg/L to organic removal rate.In the strainer with suspended impurity, colourity, heavy metal, organism and hard-degraded substance in silica sand, the gac even-granular filter material layer trap water, thereby make water obtain clarification.The removal efficient to pollutent is higher after the little flocculation reaction of the preposition oxidation of increase before filtration; Can effectively remove metals ion that floating mikrobe flco of fine particle, aged that coagulating sedimentation technology etc. can not remove and oxidation form little flco etc., water outlet is as clear as crystal.
CODcr≤50mg/L, NH in the final outflow water 3-N≤5mg/L total nitrogen≤15mg/L, total phosphorus≤0.5mg/L reach the tightest standard among the GB21900-2008 " plating pollutant emission standard ".

Claims (6)

1. electroplating wastewater efficiently makes up biochemical processing method; It is characterized in that: heavy metal ion waste water up to standard through the second pond mud-water separation, carries out the little flocculation reaction of oxidation through the little flocculation basin of peroxo-again after efficient biochemical combination pond degraded; Refilter to strainer then; Get into reuse of reuse blowoff basin or discharging at last, flow into efficient biochemical combination Chi Zhonghou at heavy metal ion waste water up to standard in the degradation process, through adding microbial nutrient solution; Control DO, MLSS, biological iron level make efficient biochemistry make up the obligate Pseudomonas with suspending that adheres in the pond and utilize the organism in the abundant degrading waste water of self metabolism.
2. electroplating wastewater according to claim 1 efficiently makes up biochemical processing method, it is characterized in that: said DO is 2~4mg/L.
3. electroplating wastewater according to claim 1 efficiently makes up biochemical processing method, it is characterized in that: said MLSS is 2.5~3.5g/L.
4. electroplating wastewater according to claim 1 efficiently makes up biochemical processing method, it is characterized in that: said biological iron level is 100~150mg/L.
5. electroplating wastewater according to claim 1 efficiently makes up biochemical processing method, it is characterized in that: through adding oxygenant and polymeric flocculant, make that the organic pollutant in the waste water purifies and flocculation in the little flocculation reaction process of said oxidation.
6. electroplating wastewater according to claim 5 efficiently makes up biochemical processing method, it is characterized in that: said oxygenant is a dioxide peroxide.
CN201010620890A 2010-12-25 2010-12-25 Electroplating waste water high-efficiency combined biochemical treatment technique Active CN102115295B (en)

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CN201010620890A CN102115295B (en) 2010-12-25 2010-12-25 Electroplating waste water high-efficiency combined biochemical treatment technique

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CN102115295B true CN102115295B (en) 2012-10-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642991B (en) 2012-04-28 2013-12-04 南京大学 Efficient combination advanced treatment method for electroplating wastewater

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1342616A (en) * 2001-06-29 2002-04-03 孙惠茹 Process for reclaiming waste electroplating liquid
CN1557999A (en) * 2004-02-06 2004-12-29 赵开方 Technology for treating electroplating effluent by biochemical process
CN101041534A (en) * 2007-04-27 2007-09-26 济南晶恒有限责任公司 Electroplating wastewater treatment reclaiming technique
CN101293719A (en) * 2007-04-26 2008-10-29 王俊川 Recovery processing technique for organic waste water of plating pretreatment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1342616A (en) * 2001-06-29 2002-04-03 孙惠茹 Process for reclaiming waste electroplating liquid
CN1557999A (en) * 2004-02-06 2004-12-29 赵开方 Technology for treating electroplating effluent by biochemical process
CN101293719A (en) * 2007-04-26 2008-10-29 王俊川 Recovery processing technique for organic waste water of plating pretreatment
CN101041534A (en) * 2007-04-27 2007-09-26 济南晶恒有限责任公司 Electroplating wastewater treatment reclaiming technique

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