CN105502831B - A kind of waste water biochemical treatment device and technique - Google Patents

A kind of waste water biochemical treatment device and technique Download PDF

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Publication number
CN105502831B
CN105502831B CN201610016591.0A CN201610016591A CN105502831B CN 105502831 B CN105502831 B CN 105502831B CN 201610016591 A CN201610016591 A CN 201610016591A CN 105502831 B CN105502831 B CN 105502831B
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processing
pam
pac
waste water
pond
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CN105502831A (en
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毛淦民
朱钟霞
袁飞
康宽华
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Guangdong Green Day Environmental Technology Co., Ltd.
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GUANGZHOU LR ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The present invention provides a kind of waste water biochemical treatment device and technique, described device includes biological processing unit and MBR reaction tank interconnected, and the dispensing pond for adding PAC and PAM is provided between the biological processing unit and MBR reaction tank.The treatment process are as follows: waste water to be processed is subjected to biochemical treatment, later, PAC processing is carried out to biochemical treatment tail end wastewater and PAM is handled, treated, and waste water is handled through MBR again, obtains qualified discharge water.Coloration and organic pollutant can simultaneously effective be further decreased the more thorough of the iron ion removing in waste water by described device and technique, and target requirement can not be proposed by solving previous coloration, suspended matter and organic pollutant.

Description

A kind of waste water biochemical treatment device and technique
Technical field
The invention belongs to technical field of sewage, it is related to a kind of waste water biochemical treatment device and technique.
Background technique
Traditional AnO+MBR technique biochemical processing process, i.e. hydrolysis acidification-(anaerobe-oxygen deficient)-aerobic-MBR (Anaerobic-Anoxic-Oxic+Membrane Bio-Reactor), can be mainly divided into three parts: first is that dephosphorization, sewage In phosphorus under anaerobic state, release polyP bacteria, under aerobic situation again by its it is more absorb, arranged in the form of excess sludge System out.Second is that denitrogenation, since the effect of simultaneous oxygen denitrifier will come from using BOD in water as hydrogen donor (organic carbon source) Nitrate and nitrate reductase in aerobic tank mixed liquor escape into atmosphere at nitrogen, achieve the purpose that denitrogenation.
With the popularization of MBR, major part biological inoculum method handles the terminally positioned MBR membrane-biotechnology of waste water at present, changes It has been apt to original biological inoculum processing technique, has eliminated most suspended matter and organic pollutant, but in leading portion using chemistry Regardless of can be introduced into ferrous ion or waste water using oxidizing process or reduction method and contain iron ion originally in method treatment process, Water quality color is normal after processing, but ferrous ions make water outlet jaundice lead to coloration at iron ion after biological inoculum method It is exceeded, while iron ion is also easily exceeded；Furthermore part colloidal substance can penetrate MBR film, into draining, cause organic matter, Ammonia nitrogen, total phosphorus are difficult to reach the primary standard of " integrated wastewater discharge standard (GB8978-1996) ".It is difficult to meet increasingly strict Environmental requirement, this virtually increases scale wastewater treatment burden, causes enterprise's draining puzzlement.
CN 104724825A discloses a kind of sewage water treatment method, which comprises water inlet line infuses sewage respectively Enter pre- anoxic pond, anaerobic pond and anoxic pond or is injected separately into anaerobic pond, anoxic pond or only injects anaerobic pond；The pre- anoxic pond into The reaction of the anoxic denitrification of row returned sludge and sewage；The anaerobic pond carries out the anaerobic phosphorus release of biochemical dephosphorization；The anoxic pond Carry out denitrification denitrogenation；The absorption of aerobic tank progress organic matter degradation, organic nitrogen and Ammonia Nitrification, phosphorus；Anoxic pond carries out same afterwards When nitration denitrification handle；Batch-type inclined-plate clarifying basin, carries out the concentration of mud-water separation processing and returned sludge, and the reflux is dirty Mud is back to the pre- anoxic pond.But treated that sewage is difficult to reach " integrated wastewater discharge standard (GB8978- for this method 1996) primary standard ".
CN 103723880A discloses a kind of P-MBR biochemical treatment system and technique, P-MBR biochemical treatment therein system System, comprising: mixed zone, absorption flocks area, biochemical reaction zone, decanting zone, film filtering area, wherein mixed zone be used for enter waste water with And new active filler is added, and waste water to be processed is tentatively mixed with the object of dosing newly being added；Absorption flocks area is for holding It receives and adsorbs the mixed waste water in mixed zone, and make its indwelling for a period of time, so that the harmful substance in waste water is filled with active filler Divide to combine and generates flocks；Biochemical reaction zone receives the waste water from the reaction of absorption flocks area, makes the waste water and the activity Substance is sufficiently reacted in the biochemical reaction zone；Decanting zone is used in the area precipitate the waste water after biochemical reaction, So that the precipitate in mixed liquor, so that clear liquid be made to separate；And film filtering area, it is clear for being formed to decanting zone Liquid is filtered, and the purified water formed after filtering is extracted.But the biochemical treatment system not can solve iron ion still and surpass Target problem.
In this context, it is necessary to which the technique of organic matter in a kind of depth removal waste water, ammonia nitrogen, total phosphorus and coloration is provided Technology.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of waste water biochemical treatment device and work Skill, described device and technique can be by the more thorough of the iron ion removing in waste water, simultaneously effective by coloration and organic contamination Object further decreases, and target requirement can not be proposed by solving previous coloration, suspended matter and organic pollutant.
To achieve this purpose, the present invention adopts the following technical scheme:
One of the objects of the present invention is to provide a kind of waste water biochemical treatment device, described device includes life interconnected Object processing unit and MBR reaction tank, are provided with the dispensing for adding PAC and PAM between the biological processing unit and MBR reaction tank Pond.
The PAM includes acid and alkalinity aluminium polychloride and/or polyaluminium sulfate；The PAM is polyacrylamide.
The basic principle of the waste water biochemical treatment device processing waste water are as follows: waste water enters biological processing unit, in biology The degradation of organic matter is carried out in processing unit, a large amount of proliferation of microorganism, treated that waste water enters dispensing for biological processing unit Pond, the PAC that adds has coagulation in pond of offeing medicine, and small colloid and ion are bridged, tiny particle is formed； The PAM added in dispensing pond grows fine particle further, makes particle specifically good settleability；PAC is to micro- life simultaneously Object does not have any toxic action, and PAM can also battalion of the supplementary carbon source as microorganism by reflux as macromolecule organic Substance is supported, colloid and ion in waste water are reduced, using the separation of MBR reaction tank, water outlet is fully able to satisfaction, and " sewage is comprehensive Close discharge standard (GB8978-1996) " primary standard.
Described device while completely removing the iron ion in waste water, can be effectively reduced the coloration of waste water and have Machine pollutant concentration, target requirement can not be proposed by solving previous coloration, suspended matter and organic pollutant.
Described device further includes the administration system for adding PAC and PAM to the dispensing pond, the administration system difference It is connected with the leading portion in dispensing pond and back segment.The administration system can first add PAC into dispensing pond, then add into dispensing pond PAM.PAC mainly plays coagulation effect, and PAM plays gantry effect.PAC add in dispensing pond leading portion by small colloid and ion into Row bridge joint, forms tiny particle；Fine particle further grows under the action of PAM, makes particle specifically good settleability.
The biological processing unit includes connected anaerobic pond, biological denitrificaion pond and aerobic tank, the aerobic tank with it is described Dispensing pond is connected.Waste water carries out the release of phosphorus in anaerobic pond, provides good item for the hydrolysis of organic matter reaction in anaerobic pond Part；Contain a large amount of microorganism in aerobic tank and bred rapidly, consumes labile organic compound in sewage；PolyP bacteria is extensive simultaneously Power is brought back to life, mass propagation, the dissolved phosphorus in excess ingestion environment, strengthening reduces COD, phosphorus removal functional.The biological treatment list Member is for reducing COD and eliminates the phosphorus in waste water, can be AnA in O-MBR process systemnO (hydrolysis acidification-(anaerobism+lack Oxygen)-aerobic) unit, wherein n can be 1,2,3,4 or 5 etc..Those skilled in the art can be selected as needed at different biologies Manage unit.
The diving mixer for shaking pool bottom sludge is provided in the biological denitrificaion pond, the diving mixer is used for Shake the sludge at anaerobic pond bottom.
The MBR reaction bottom of pond portion is connected with the aerobic tank.Sludge a part that the MBR reaction tank generates is back to In the aerobic tank, rest part discharge.The PAM contained in the sludge of reflux is macromolecule organic, can be used as microorganism Nutriment, be its supplementary carbon source.
The second object of the present invention is to provide a kind of biochemical treatment process for wastewater using device as described above, the work Skill are as follows: successively carry out waste water to be processed progress biochemical treatment at PAC processing and PAM to the waste water after biochemical treatment later Reason, treated, and waste water is handled through MBR again, obtains qualified discharge water.
The qualified discharge water refers to that water outlet meets the primary standard of " integrated wastewater discharge standard (GB8978-1996) " Water.
PAC mainly plays coagulation effect, and PAM plays gantry effect.PAC add in dispensing pond leading portion by small colloid and from Son is bridged, and tiny particle is formed；Fine particle further grows under the action of PAM, keeps particle specific good heavy Drop property.
The biological treatment is biological Anaerobic Treatment, biological denitrificaion processing and biology aerobic processing.
Preferably, the waste water to be processed successively carries out bio anaerobic processing, biological denitrificaion processing and biology aerobic processing.
Waste water to be processed carries out the release of phosphorus in bio anaerobic treatment process, is the hydrolysis of useless Organic substance in water to be processed Reaction provides good condition；In Aerobic, a large amount of microorganism is bred rapidly, is consumed degradable organic in waste water Object；PolyP bacteria rejuvenates simultaneously, mass propagation, and the dissolved phosphorus in excess ingestion environment, strengthening reduces COD, phosphorus removal functional.
Preferably, the bio anaerobic processing carries out in anaerobic pond.
Preferably, the waste water of the bio anaerobic processing is carried out, pH value is 8~9, such as 8,8.5 or 9.
Preferably, the biological denitrificaion processing carries out in biological denitrificaion pond.
Preferably, the biology aerobic processing carries out in aerobic tank.
The usage amount of PAC is 15~25ppm in PAC processing, as 16ppm, 17ppm, 18ppm, 19ppm, 20ppm, 22ppm or 24ppm etc..
Preferably, the usage amount of PAM is 1.5~2.5ppm in PAM processing, as 1.6ppm, 1.8ppm, 2.0ppm, 2.2ppm or 2.4ppm etc..
Preferably, the weight average molecular weight of PAM used in the PAM processing is 18,000,000.Molecular weight is small, then treatment effect It is slightly worse.
The dosage of the PAC and PAM can be unsuitable excessive according to the pollutant situation and property adjustment in actual waste water Or it is very few, it adds and excessively will affect sludge activity and sludge quantity, add and very few removal effect is not achieved.
Preferably, the ratio between usage amount of the PAC and PAM is (8~15): 1, such as 9:1,10:1,11:1,12:1,13:1 Or 14:1 etc..PAC mainly plays coagulation effect, and PAM plays gantry effect, and investment ratio is too big, will increase the yield of sludge, puts into Ratio is too small, and the flocculability and settleability of sludge are poor, and color removal is caused to be difficult to reach optimum efficiency.
Preferably, PAC processing is 5~15min more early than the time that PAM handle, as morning 6min, 7min, 8min, 9min, 10min, 12min or 14min etc..Control add the time difference be 5~15min help to obtain better pollutant process effect. It is short to add the time difference, then PAC is not mixed with waste water sufficiently, and directly in conjunction with PAM, influence agent efficacy；Add the time difference It is long, then it needs to increase reaction tank volume, influences overall investment.
The sludge reflux that the MBR processing generates re-starts biochemical treatment.Contain in the sludge that the MBR processing generates PAM be macromolecule organic, can be used as the nutriment of microorganism, can be biological treatment supplementary carbon source.
Preferably, the reflux ratio of the sludge is 1:(2-3), such as 1:2.2,1:2.3,1:2.5,1:2.6 or 1:2.8； The delivery ratio of the sludge is 1:(0.04-0.08), such as 1:0.05,1:0.06 or 1:0.07.
The biochemical treatment process for wastewater as a preferred technical solution, are as follows: waste water to be processed is successively carried out to biology and is detested Oxygen processing, biological denitrificaion processing and biology aerobic processing, later, successively carry out PAC processing and PAM for the waste water after biological treatment The time difference of processing, PAC processing and PAM processing is 5~15min, the usage amount of PAC is 15~25ppm, PAM in PAC processing The usage amount of PAM is 1.5~2.5ppm in processing, and the ratio between the usage amount that the weight average molecular weight of PAM is 18,000,000, PAC and PAM is (8~15): 1, treated, and waste water is handled through MBR again, obtains qualified discharge water, wherein the sludge reflux weight that MBR processing generates New to carry out biology aerobic processing, the reflux ratio of sludge is 1:(2-3), the delivery ratio of sludge is 1:(0.04-0.08).
Compared with prior art, the invention has the benefit that
Waste water biochemical treatment device provided by the invention makes by the biochemical waste water of biological processing unit by adding After having the dispensing pond of PAC and PAM, MBR reactor is entered back into, the PAC and PAM added in pond of offeing medicine can be by the iron ion in waste water And colloidal substance is coprecipitated, destroys the original colloid equilibrium of waste water, to reach later period better iron ion abjection effect；
Waste water biochemical treatment device provided by the invention has studied the characteristics of MBR film itself, from retention diameter, improves Waste water mixing liquid status, always reaches higher pollutants removal rate, and in turn avoids colloid mucous membrane；
Waste water biochemical treatment device provided by the invention and technique can be by the more thorough of the iron ion removing in waste water, together When effectively coloration and organic pollutant are further decreased, solving previous coloration, suspended matter and organic pollutant can not mention Target requirement.
Detailed description of the invention
Fig. 1 is the AO-PP-MBR processing unit schematic diagram that the embodiment of the present invention 1 provides.
Fig. 2 is the A that the embodiment of the present invention 2 provides2O-PP-MBR processing unit schematic diagram.
Wherein: A represents anaerobic pond, and A1 represents hydrolysis acidification pool, and A2 represents anoxic pond, and O represents aerobic tank, and PP represents PAC With PAM dispensing pond, MBR represents MBR reaction tank, and 01, which represents waste water stream, represents sludge reflux through route, 02, and 03 represents excess sludge Discharge, 04 representative add PAC, and 05 representative adds PAM.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
AO+PP+MBR waste water biochemical treatment device, including pass through the sequentially connected anaerobic pond of pipeline, activated sludge tank, PAC With the dispensing pond PAM and MBR reaction tank.
Utilize the process flow of AO+PP+MBR waste water biochemical treatment device processing electroplating wastewater are as follows: electroplating wastewater is logical Piping is transported to anaerobic pond A, enters aerobic tank by pulse, aerobic tank overflows to PAC and PAM dispensing pond, PAC by top MBR reaction tank is flowed to by bottom preformed hole with the dispensing pond PAM, the mixed liquor of the MBR reaction tank will by sludge reflux pump For sludge reflux to aerobic tank leading portion and Impulsive tank, excess sludge is transported to sludge treating system by sludge reflux pump.Sludge returns For stream than being 1:2.4, sludge delivery ratio is 1:006.
It is added respectively in PAC and PAM the dispensing pond of the AO+PP+MBR waste water biochemical treatment device by medicine system PAC, PAM and PAC and PAM, and dosage is identical, is 22ppm.When PAC and PAM is added simultaneously, the dosage of PAC is The dosage of 20ppm, PAM are 2ppm, and the weight average molecular weight of PAM, which is that 18,000,000, PAC ratio PAM is early, adds 5min.
Pollutant concentration in electroplating wastewater, treated Pollutants in Wastewater content, " integrated wastewater discharge standard (GB8978-1996) " primary standard GB8978-1996 the second pollutant highest allows concentration of emission and AO-MBR to handle The pollutant concentration in waste water crossed is as shown in table 1.Unit is milligrams per liter (mg/L).
Table 1
Embodiment 2
A2O-PP-MBR waste water biochemical treatment device, including pass through the sequentially connected hydrolysis acidification pool of pipeline, anoxic pond, connect Oxidation pond, PAC and the dispensing pond PAM and MBR reaction tank are touched, has added PAC and PAM in the PAC and PAM dispensing pond.
Using the A2O-PP-MBR waste water biochemical treatment device handles electroplating wastewater, process flow are as follows:
Electroplating wastewater, which is pipelined to hydrolysis acidification pool and passes through overflow weir again, flows to anoxic pond, and anoxic pond passes through bottom Preformed hole flows to contact-oxidation pool, and contact-oxidation pool flows automatically to PAC and PAM dispensing pond by top preformed hole, and PAC and PAM are thrown Medicine pond flows to MBR reaction tank by bottom preformed hole, and the mixed liquor of the MBR reaction tank passes through sludge reflux pump for sludge reflux To anoxic pond and contact-oxidation pool, excess sludge is transported to sludge treating system by sludge reflux pump；The PAC and PAM is thrown PAC and PAM is added by medicine system in medicine pond.Wherein, the dosage of the PAC is 25ppm, and the dosage of the PAM is The weight average molecular weight of 3.1ppm, PAM be 18,000,000, PAC add time ratio PAM add time early 10min；Return sludge ratio For 1:3, sludge delivery ratio is 1:0.08, obtains the water of qualified discharge.
Pollutant concentration in electroplating wastewater is identical as the pollutant concentration in the electroplating wastewater in embodiment 1, in use State A2The concentration of the processed Pollutants in Wastewater of O-PP-MBR waste water biochemical treatment device and use A2O-MBR processing plating Waste water the results are shown in Table shown in 2.
Table 2
Embodiment 3
A3O-PP-MBR waste water biochemical treatment device, including pass through the sequentially connected hydrolysis acidification pool of pipeline, level-one anoxic It has been added in pond, second level anoxic pond, contact-oxidation pool, PAC and the dispensing pond PAM and MBR reaction tank, the PAC and PAM dispensing pond PAC and PAM.
Using the A3O-PP-MBR waste water biochemical treatment device handles electroplating wastewater, process flow are as follows:
Electroplating wastewater, which is pipelined to hydrolysis acidification pool and passes through overflow weir again, flows to level-one anoxic pond, passes through two later Grade anoxic pond, the waste water in second level anoxic pond flow to contact-oxidation pool by bottom preformed hole, and it is pre- that contact-oxidation pool passes through top It boxes out and flows automatically to PAC and PAM dispensing pond, PAC and PAM dosing pond flows to MBR reaction tank by bottom preformed hole, and the MBR is anti- For the mixed liquor of Ying Chi by sludge reflux pump by sludge reflux to anoxic pond and contact-oxidation pool, excess sludge passes through sludge reflux Pump is transported to sludge treating system；PAC and PAM is added by medicine system in the dispensing pond the PAC and PAM.Wherein, the PAC Dosage be 15ppm, the dosage of the PAM is 1ppm, and the weight average molecular weight of PAM is that 18,000,000, PAC adds time ratio PAM's adds morning time 15min；Return sludge ratio is 1:2, and sludge delivery ratio is 1:0.04.Obtain the water of qualified discharge.
Pollutant concentration in the electroplating wastewater is identical as the pollutant concentration in the electroplating wastewater in embodiment 1.Benefit Use A3Pollutant concentration in the processed electroplating wastewater of O-PP-MBR waste water biochemical treatment device and use A3O-MBR processing The pollutant concentration in waste water crossed is as shown in table 3.
Table 3
Comparative example 1
In addition to PAC is replaced with bodied ferric sulfate, remaining is same as Example 2.
Comparative example 2
In addition to the PAM of 18,000,000 molecular weight to be replaced with to 6,000,000 PAM of molecular weight, remaining is same as Example 2.
Pollutant concentration in comparative example 1 and comparative example 2 treated electroplating wastewater is as shown in table 4.
Table 4
The Applicant declares that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention not office It is limited to this, it should be clear to those skilled in the art, any to belong to those skilled in the art and take off in the present invention In the technical scope of dew, any changes or substitutions that can be easily thought of, and all of which fall within the scope of protection and disclosure of the present invention.

Claims (12)

1. a kind for the treatment of process of waste water biochemical treatment device, described device is that biological processing unit interconnected and MBR are anti- Ying Chi, which is characterized in that the biological processing unit includes the anaerobic pond being sequentially connected, biological denitrificaion pond and aerobic tank, described MBR reaction tank is connected with the aerobic tank, is provided between the biological processing unit and MBR reaction tank and adds PAC's and PAM Dispensing pond and add the administration system of PAC and PAM to the dispensing pond, the administration system respectively with the leading portion in dispensing pond and Back segment is connected；
The technique are as follows: successively carry out waste water to be processed progress biological treatment at PAC to the waste water after biological treatment later Reason and PAM processing, treated, and waste water is handled through MBR again, obtains qualified discharge water；
The ratio between usage amount of the PAC and PAM is (8 ~ 15): 1；
The PAC processing is 5 ~ 15min more early than the time that PAM is handled；
The weight average molecular weight of PAM used in the PAM processing is 18,000,000；
The sludge reflux that MBR processing generates is to aerobic tank；
The reflux ratio of the sludge is 1:(2-3), the delivery ratio of the sludge is 1:(0.04-0.08)；
Contain PAM in returned sludge, the PAM is macromolecule organic, as the nutriment of microorganism, supplements carbon for it Source.
2. treatment process according to claim 1, which is characterized in that the aerobic tank is connected with the dispensing pond.
3. treatment process according to claim 2, which is characterized in that be provided in the biological denitrificaion pond for shaking pond The diving mixer of bottom sludge.
4. treatment process according to claim 1, which is characterized in that the biological treatment is biological Anaerobic Treatment, biology Denitrogenation processing and biology aerobic processing.
5. treatment process according to claim 1, which is characterized in that the pending water successively carries out at bio anaerobic Reason, biological denitrificaion processing and biology aerobic processing.
6. treatment process according to claim 5, which is characterized in that the bio anaerobic processing carries out in anaerobic pond.
7. treatment process according to claim 5, which is characterized in that carry out the waste water of the bio anaerobic processing, pH Value is 8 ~ 9.
8. treatment process according to claim 5, which is characterized in that biological denitrificaion processing in biological denitrificaion pond into Row.
9. treatment process according to claim 5, which is characterized in that the biology aerobic processing carries out in aerobic tank.
10. treatment process according to claim 1, which is characterized in that in the PAC processing usage amount of PAC be 15 ~ 25ppm。
11. treatment process according to claim 1, which is characterized in that in the PAM processing usage amount of PAM be 1.5 ~ 2.5ppm。
12. treatment process according to claim 1, which is characterized in that the technique are as follows: successively carry out waste water to be processed Bio anaerobic processing, biological denitrificaion processing and biology aerobic processing, later, by biology aerobic, treated that waste water successively carries out PAC processing and PAM processing, PAC processing and PAM processing time difference be 5 ~ 15min, PAC processing in PAC usage amount be 15 ~ The usage amount of PAM is 1.5 ~ 2.5ppm in 25ppm, PAM processing, and the weight average molecular weight of PAM is the use of 18,000,000, PAC and PAM The ratio between amount is (8 ~ 15): 1, treated, and waste water is handled through MBR again, obtains qualified discharge water, wherein the dirt that MBR processing generates Mud reflux re-starts biology aerobic processing, and the reflux ratio of sludge is 1:(2-3), the delivery ratio of sludge is 1:(0.04-0.08).
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