CN106587505A - Treating method for high-COD and high-phosphorus wastewater - Google Patents
Treating method for high-COD and high-phosphorus wastewater Download PDFInfo
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Abstract
The invention discloses a treating method for high-COD and high-phosphorus wastewater. The method includes the steps that the high-COD and high-phosphorus wastewater is taken, enters an anaerobic tower, and is subjected to an anaerobic reaction, and anaerobic outlet water is subjected to multi-dimension electrochemical catalysis to obtain multi-dimension electrochemical catalysis outlet water; the multi-dimension-electrochemical-catalysis outlet water is precipitated in a primary coagulative precipitation tank to obtain precipitated outlet water; the precipitated outlet water is treated by biochemical systems of a hydrolyzing tank, an aerobiotic tank and a secondary precipitation tank to obtain biochemical outlet water; the biochemical outlet water is led into a secondary coagulative precipitation tank, a PAC chemical and a PAM chemical are added into the secondary coagulative precipitation tank and precipitated, and then supernatant liquid meeting the discharging standard is obtained. The treating method has the advantages that a large part of COD are removed through the anaerobic tower, and the following advanced oxidation cost is greatly reduced; organic phosphorus is converted into inorganic phosphorus through hydroxyl free radicals generated through multi-dimension electrochemical catalysis, then the hydrolysis and aerobiotic technologies are adopted, and the outlet water quality is guaranteed.
Description
Technical field
The present invention relates to a kind of processing method of industrial wastewater, more particularly to high COD and high organophosphors wastewater from chemical industry are entered
A kind of processing method that row is processed, specifically a kind of processing method of high COD high phosphorus waste water.
Background technology
Chemical enterprise, because technique needs usually to add phosphorus containg substances, causes the waste water that enterprise produces to contain when product is produced
There are higher organophosphors, Phos and COD.If these waste water are directed out into discharge, environmental pollution is not only resulted in, and
The sustainable development of enterprise can also be affected.Particularly current environmental protection policy also strictly controls useless containing COD and total phosphorus
The discharge of water.
At present conventional phosphorus-contained wastewater treating method has physico-chemical process and biochemical process, and the thinking that physico-chemical process is adopted is first senior oxygen
Organophosphors are converted into Phos by change, are subsequently adding the phosphorus that lime precipitation is gone in eliminating water.If Li Kaiming is in CN102139974B
A kind of processing method of phosphorus-containing wastewater is disclosed, waste water is carried out into oxidation into oxidation pond makes organophosphors change into Phos, so
Precipitate into coagulative precipitation tank afterwards, finally filter.And for example yellow one et al. discloses a kind of containing organic in CN101704606B
The processing method of phosphorus waste water, enters efficiently catalyzing and oxidizing device, subsequently into iron-carbon micro-electrolysis by waste water Jing after sandfiltration pot filtration
Device, finally advanced oxidation again.Said method can consume a large amount of oxidants due to COD higher in water, cause actual answering
Used time high cost, and due to remaining total phosphorus and COD cannot be consumed without subsequent biochemical technique, it is difficult to realize the real of waste water
Qualified discharge.Biochemical process due to Phos in water can only be consumed, to containing higher organophosphors waste water be extremely difficult to dephosphorization and
The purpose of COD.
The content of the invention
The technical problem to be solved is to be directed to above-mentioned state of the art, and provides efficient, and stable, economy is in fact
With, and the processing method of a kind of high COD high phosphorus waste water that can be to being processed containing high COD and high organophosphors wastewater from chemical industry.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for：A kind of processing method of high COD high phosphorus waste water,
The method is comprised the following steps：
Step one：After wastewater from chemical industry PH is adjusted to into 7.5, anaerobic reaction is carried out into anaerobic tower, the major part removed in waste water has
Machine thing, obtains anaerobic effluent；
Step 2：Above-mentioned anaerobic effluent is introduced into multi-dimensional electro-catalytic pond, the COD in anaerobic effluent is further removed and is made anaerobism
Organophosphors in water outlet are converted into Phos, obtain multi-dimensional electro-catalytic water outlet；
Step 3：Make multi-dimensional electro-catalytic water outlet enter a coagulative precipitation tank, and CaO, PAC are added in a coagulative precipitation tank
With PAM medicaments, make the Phos in multi-dimensional electro-catalytic water outlet form iron phosphate, calcium phosphate and aluminum phosphate postprecipitation, obtain supernatant
Precipitation water outlet；
Step 4：Above-mentioned precipitation water outlet is introduced into successively hydrolytic tank, Aerobic Pond and second pond, remaining COD and inorganic is removed
Phosphorus, obtains bio-chemical effluent；
Step 5, above-mentioned bio-chemical effluent is introduced second coagulation sedimentation tank, and add in second coagulation sedimentation tank PAC and
PAM medicaments, obtain supernatant qualified discharge.
To optimize above-mentioned technical proposal, the measure taken also includes：
Anaerobic tower in above-mentioned steps one adopts forth generation anaerobic reactor IC, and waste water carries out anaerobic reaction in anaerobic tower
The time of staying be -72 hours 40 hours.
First PH is adjusted to into 3-4 by anaerobic effluent sulphuric acid in above-mentioned step two, in then entering back into multi-dimensional electro-catalytic pond,
And the hydrogen peroxide that concentration is 30% is added in multi-dimensional electro-catalytic, the addition of hydrogen peroxide is the 3 ‰ -8 ‰ of anaerobic effluent amount, then
Under the catalysis of 500V unidirectional currents and ferrum carbon filler, 3-5 hours are reacted, remove COD and destruction organophosphors structure.
The CaO added in a coagulative precipitation tank in above-mentioned step three is 40PPM -80PPM, and the PAC of addition is
300PPM -600PPM, Phos are precipitated, and one time coagulative precipitation tank surface loading is less than 0.5m3/m2/h。
The hydrolysis time of staying of the above-mentioned precipitation water outlet in hydrolytic tank be -18 hours 16 hours, in Aerobic Pond
The aerobic time of staying is -36 hours 24 hours, and second pond surface loading is less than 1m3/m2/h。
The PAC added in second coagulation sedimentation tank in above-mentioned step five is 300PPM -600PPM, and Phos are sunk
Form sediment, second coagulation sedimentation tank surface loading is less than 0.5m3/m2/h。
Above-mentioned anaerobic tower, multi-dimensional electro-catalytic pond, coagulative precipitation tank, hydrolytic tank, Aerobic Pond, second pond and secondary mixed
The precipitate produced in solidifying sedimentation tank is discharged in sludge-tank.
Above-mentioned second pond is provided with the sludge reflux passage that unilaterally connected Aerobic Pond water inlet end reprocesses sludge reflux.
Compared with prior art, the wastewater from chemical industry containing high COD high phosphorus is adopted materialization and life by processing method of the invention
Change the method for combining to process, i.e., first make wastewater from chemical industry carry out anaerobic reaction into anaerobic tower, anaerobic effluent enters multi-dimensional electro-catalytic
After enter back into coagulative precipitation tank precipitation, then the precipitation water outlet again to obtaining be hydrolyzed successively, aerobic, second pond and two
It is final to obtain the supernatant that stable water outlet reaches discharge index after secondary coagulating sedimentation.
It is an advantage of the current invention that：
(1) materialization and biochemical combination, first pass through anaerobic tower and remove most COD, greatly reduce the cost of back segment advanced oxidation.
(2) hydroxyl radical free radical for being produced by multi-dimensional electro-catalytic efficient catalytic technology is by organophosphors conversion as much as possible
For Phos.
(3) end adopts hydrolysis+aerobic process, further reduces COD and total phosphorus, enables wastewater from chemical industry qualified discharge.
Description of the drawings
Fig. 1 is the process chart of the present invention.
Specific embodiment
Embodiments of the invention are described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the process chart of the present invention.
Embodiment one
As shown in figure 1, the processing method of a kind of high COD high phosphorus waste water of the present invention, wastewater from chemical industry is adopted thing by the processing method
Change and the biochemical method for combining is processed, specifically include following steps：
Step one：After wastewater from chemical industry PH is adjusted to into 7.5, anaerobic reaction is carried out into anaerobic tower, the major part removed in waste water has
Machine thing, obtains anaerobic effluent；
Step 2：Above-mentioned anaerobic effluent is introduced into multi-dimensional electro-catalytic pond, the COD in anaerobic effluent is further removed and is made anaerobism
Organophosphors in water outlet are converted into Phos, obtain multi-dimensional electro-catalytic water outlet；
Step 3：Make multi-dimensional electro-catalytic water outlet enter a coagulative precipitation tank, and CaO, PAC are added in a coagulative precipitation tank
With PAM medicaments, make the Phos in multi-dimensional electro-catalytic water outlet form iron phosphate, calcium phosphate and aluminum phosphate postprecipitation, obtain supernatant
Precipitation water outlet；
Step 4：Above-mentioned precipitation water outlet is introduced into successively hydrolytic tank, Aerobic Pond and second pond, remaining COD and inorganic is removed
Phosphorus, obtains bio-chemical effluent；
Step 5, above-mentioned bio-chemical effluent is introduced second coagulation sedimentation tank, and add in second coagulation sedimentation tank PAC and
PAM medicaments, obtain supernatant qualified discharge.
Anaerobic tower in above-mentioned steps one adopts forth generation anaerobic reactor IC, and waste water carries out anaerobism in anaerobic tower
The time of staying of reaction is -72 hours 40 hours.
First PH is adjusted to into 3-4 by anaerobic effluent sulphuric acid in above-mentioned step two, in then entering back into multi-dimensional electro-catalytic pond,
And the hydrogen peroxide that concentration is 30% is added in multi-dimensional electro-catalytic, the addition of hydrogen peroxide is the 3 ‰ -8 ‰ of anaerobic effluent amount, then
Under the catalysis of 500V unidirectional currents and ferrum carbon filler, 3-5 hours are reacted, remove COD and destruction organophosphors structure.
The CaO added in a coagulative precipitation tank in above-mentioned step three is 40PPM -80PPM, and the PAC of addition is
300PPM -600PPM, Phos are precipitated, and one time coagulative precipitation tank surface loading is less than 0.5m3/m2/h。
The hydrolysis time of staying of the above-mentioned precipitation water outlet in hydrolytic tank be -18 hours 16 hours, in Aerobic Pond
The aerobic time of staying is -36 hours 24 hours, and second pond surface loading is less than 1m3/m2/h。
The PAC added in second coagulation sedimentation tank in above-mentioned step five is 300PPM -600PPM, and Phos are sunk
Form sediment, second coagulation sedimentation tank surface loading is less than 0.5m3/m2/h。
Above-mentioned anaerobic tower, multi-dimensional electro-catalytic pond, coagulative precipitation tank, hydrolytic tank, Aerobic Pond, second pond and secondary mixed
The precipitate produced in solidifying sedimentation tank is discharged in sludge-tank.
Above-mentioned second pond is provided with the sludge reflux passage that unilaterally connected Aerobic Pond water inlet end reprocesses sludge reflux.
Embodiment two
A kind of processing method of high COD high phosphorus waste water, the processing method is by the waste water containing high COD high phosphorus using materialization and biochemistry
With reference to method process, specifically include following steps：
Step one：After the above-mentioned waste water PH containing high COD high phosphorus is adjusted to into 7.5, carry out in forth generation anaerobic reactor IC
Anaerobic reaction, time of staying of anaerobic reaction is 50 hours, so as to remove waste water in most of Organic substance, obtain anaerobism and go out
Water；The precipitate Jing blow-off pipes that waste water is produced during anaerobic reaction are made to be directly discharged in sludge-tank simultaneously；
Step 2：PH is first adjusted to into 3.5 by above-mentioned anaerobic effluent with sulphuric acid, in then entering back into multi-dimensional electro-catalytic pond, and to
The hydrogen peroxide that concentration is 30% is added in multi-dimensional electro-catalytic, the addition of hydrogen peroxide is the 5 ‰ of anaerobic effluent amount, then straight in 500V
Under the catalysis of stream electricity and ferrum carbon filler, react 4 hours, further remove the COD in anaerobic effluent and make having in anaerobic effluent
Machine phosphorus is converted into Phos, obtains multi-dimensional electro-catalytic water outlet；The precipitate Jing for making anaerobic effluent produce in catalytic process simultaneously
Blow-off pipe is directly discharged in sludge-tank；
Step 3：The PAM medicaments of the PAC and 1PPM of CaO, 400PPM of 50PPM are added in multi-dimensional electro-catalytic water outlet, is used in combination
PH is adjusted to 7.5 by NaOH, is entered in a coagulative precipitation tank after stirring 20min, and one time coagulative precipitation tank surface loading is less than
0.5m3/m2/ h, makes the Phos in multi-dimensional electro-catalytic water outlet be formed after iron phosphate, calcium phosphate and aluminum phosphate in a coagulating sedimentation
Precipitate in pond, obtain the precipitation water outlet of supernatant；The precipitate Jing blow-off pipes produced in coagulative precipitation tank are directly discharged to dirt
In mud sump；
Step 4：The biochemical treatment system that above-mentioned precipitation water outlet introduces successively hydrolytic tank, Aerobic Pond and second pond composition is entered
Row biochemical treatment, to remove remaining COD and Phos, so as to obtain bio-chemical effluent；Wherein：Precipitation water outlet is in hydrolytic tank
The hydrolysis time of staying is -18 hours 16 hours, aerobic time of staying in Aerobic Pond is -36 hours 24 hours, second pond
Surface loading is less than 1m3/m2/h；And the equal Jing blow-off pipes of precipitate produced in hydrolytic tank, Aerobic Pond and second pond are directly discharged
To in sludge-tank；In order to improve the effect of biochemical treatment, second pond is provided with unilaterally connected Aerobic Pond water inlet end and makes sludge reflux again
The sludge reflux passage of secondary entrance Aerobic Pond Aerobic Process for Treatment.
Step 5, add in above-mentioned bio-chemical effluent 300PPM PAC and 1PPM PAM medicaments, and stir after 10min
Into in second coagulation sedimentation tank, second coagulation sedimentation tank surface loading is less than 0.5m3/m2/h；Supernatant is obtained after precipitate
The supernatant qualified discharge for meeting discharge standard.Jing blow-off pipes in second coagulation sedimentation tank are directly discharged in sludge-tank.
Embodiment three
Acetylizing agent-acetic anhydride used by certain Production in Chemical Plant cellulose diacetate is in ammonium dihydrogen phosphate catalyst by acetic acid
Under the conditions of, crack under high temperature and prepare.The waste water COD of generation is about 6000mg/L, and total phosphorus is about 180 mg/L.These waste water are such as
Fruit directs out discharge, can not only pollute the environment of surrounding, and also affects the sustainable development of enterprise.In order that produce
Waste water energy qualified discharge, its process step is as follows：
Step one：Anaerobic reaction, the anaerobism time of staying are carried out after first waste water PH being adjusted to into 7.5 into forth generation anaerobic reactor IC
For 40 hours, 83% COD is removed, obtain anaerobic effluent, it is 1000 mg/L that experiment measures the COD of anaerobic effluent, and total phosphorus is 170
mg/L；
Step 2：PH is adjusted to 3.5 by the anaerobic effluent sulphuric acid that step one is obtained, into multi-dimensional electro-catalytic pond, in multidimensional electricity
Add the hydrogen peroxide that concentration is 30% in catalysis, the addition of hydrogen peroxide is the 4 ‰ of anaerobic effluent amount, and in 500V unidirectional currents and
Under the catalysis of ferrum carbon filler, react 3 hours, organophosphors in anaerobic effluent are switched to into Phos, obtain multi-dimensional electro-catalytic water outlet；4th
For anaerobic reactor IC and multi-dimensional electro-catalytic pond composition materialization processing system.
Step 3：CaO, the PAM of the PAC and 1PPM of 300PPM of 40PPM are added in multi-dimensional electro-catalytic water outlet, NaOH is used
PH is adjusted to into 7.5, after stirring 10min a coagulative precipitation tank, a m of coagulative precipitation tank surface loading 0.5 are entered3/m2/ h, makes
Phos in multi-dimensional electro-catalytic water outlet are formed and precipitated in a coagulative precipitation tank into one after iron phosphate, calcium phosphate and aluminum phosphate
Step removes Phos in multi-dimensional electro-catalytic water outlet, obtains the precipitation water outlet of supernatant, and the COD of experimental test precipitation water outlet is 100
Mg/L, total phosphorus is 10mg/L.
Step 4：Again precipitation water outlet is sequentially entered into hydrolytic tank, Aerobic Pond and second pond, precipitate water outlet water in hydrolytic tank
The solution time of staying is 16 hours, 24 hours aerobic time of staying in Aerobic Pond, the m of second pond surface loading 0.83/m2/ h,
Remaining total phosphorus and COD are removed, bio-chemical effluent is obtained, it is 40 mg/L that test measures the COD of bio-chemical effluent, and total phosphorus is 0.5mg/L.
Hydrolytic tank, Aerobic Pond and second pond are constituted carries out the biochemical treatment system of biochemical treatment to precipitating water outlet.
Step 5：The PAM medicaments of the PAC and 1PPM of 300PPM are added in above-mentioned bio-chemical effluent, and is stirred after 10min
Into second coagulation sedimentation tank, total phosphorus and COD are further removed, second coagulation sedimentation tank surface loading is less than 0.5m3/m2/h；
To the supernatant qualified discharge for meeting discharge standard of supernatant.
Example IV
A kind of processing method of high COD high phosphorus waste water, the processing method is by the waste water containing high COD high phosphorus using materialization and biochemistry
With reference to method process, specifically include following steps：
Step one：After the above-mentioned waste water PH containing high COD high phosphorus is adjusted to into 7.5, anaerobic reaction, anaerobism are carried out in anaerobic tower
The time of staying of reaction be 40 hours, so as to remove waste water in most of Organic substance, obtain anaerobic effluent；Anaerobic tower adopts
Four generation anaerobic reactor IC；
Step 2：PH is first adjusted to into 3.5 by above-mentioned anaerobic effluent with sulphuric acid, in then entering back into multi-dimensional electro-catalytic pond, and to
The hydrogen peroxide that concentration is 30% is added in multi-dimensional electro-catalytic, the addition of hydrogen peroxide is the 6 ‰ of anaerobic effluent amount, then straight in 500V
Under the catalysis of stream electricity and ferrum carbon filler, react 3.5 hours, further remove the COD in anaerobic effluent and make in anaerobic effluent
Organophosphors are converted into Phos, obtain multi-dimensional electro-catalytic water outlet；
Step 3：Multi-dimensional electro-catalytic water outlet is entered in blender coagulative precipitation tank, and to a coagulative precipitation tank
The PAM medicaments of the PAC and 1PPM of CaO, 500PPM of middle addition 60PPM, and after PH is adjusted to into 7.5 with NaOH, it is then turned on stirring
Stand after machine stirring 10min, time of repose is 24 hours to 72 hours, make the Phos in multi-dimensional electro-catalytic water outlet form phosphoric acid
Precipitate in a coagulative precipitation tank after ferrum, calcium phosphate and aluminum phosphate, obtain the precipitation water outlet of supernatant；Coagulative precipitation tank table
Face load is less than 0.5m3/m2/h；
Step 4：Above-mentioned precipitation water outlet is introduced successively into hydrolytic tank, Aerobic Pond and second pond to remove remaining COD and inorganic
Phosphorus, precipitate water outlet in hydrolytic tank hydrolysis the time of staying be -18 hours 16 hours, the aerobic time of staying in Aerobic Pond
For -36 hours 24 hours, second pond surface loading was less than 1m3/m2/h；So as to obtain bio-chemical effluent；Hydrolytic tank, Aerobic Pond and two
Heavy pond constitutes biochemical treatment system；
Step 5, by bio-chemical effluent enter with blender second coagulation sedimentation tank in, and in second coagulation sedimentation tank plus
After the PAM medicaments of the PAC and 1PPM that enter 400PPM, restart blender stirring 10min after stand, time of repose be 24 hours extremely
72 hours.Obtain the supernatant qualified discharge for meeting discharge standard of supernatant.Second coagulation sedimentation tank surface loading is less than
0.5m3/m2/h。
Above-mentioned anaerobic tower, multi-dimensional electro-catalytic pond, coagulative precipitation tank, hydrolytic tank, Aerobic Pond, second pond and secondary mixed
The precipitate produced in solidifying sedimentation tank is discharged in sludge-tank.
Above-mentioned second pond is provided with the sludge reflux passage that unilaterally connected Aerobic Pond water inlet end reprocesses sludge reflux.
The present invention relates to a kind of processing method of high COD high phosphorus waste water, taking high COD high phosphorus waste water and being introduced into anaerobic tower is carried out
Anaerobic reaction, anaerobic effluent enters multi-dimensional electro-catalytic+coagulating sedimentation, and precipitation water outlet is entered and hydrolyzes+aerobic+two heavy+coagulating sedimentation,
Stable water outlet reaches discharge index.Have an advantage in that：（1）First pass through anaerobic tower and remove most COD, greatly reduce back segment senior
The cost of oxidation；(2) organophosphors are converted into after Phos and enter back into water by the hydroxyl radical free radical produced by multi-dimensional electro-catalytic
Solution+aerobic process, it is ensured that effluent quality.The present invention be it is a kind of efficiently, stable, economical and practical removal COD and the place of total phosphorus
Reason method.
Although the present invention is shown and described by reference to preferred embodiment, this professional ordinary skill
Personnel are it is to be appreciated that in the range of claims, can make the various change in form and details.
Claims (8)
1. a kind of processing method of high COD high phosphorus waste water, is characterized in that：The method is comprised the following steps：
Step one：After wastewater from chemical industry PH is adjusted to into 7.5, anaerobic reaction is carried out into anaerobic tower, the major part removed in waste water has
Machine thing, obtains anaerobic effluent；
Step 2：Above-mentioned anaerobic effluent is introduced into multi-dimensional electro-catalytic pond, the COD in anaerobic effluent is further removed and is made anaerobism
Organophosphors in water outlet are converted into Phos, obtain multi-dimensional electro-catalytic water outlet；
Step 3：Make multi-dimensional electro-catalytic water outlet enter a coagulative precipitation tank, and CaO, PAC are added in a coagulative precipitation tank
With PAM medicaments, make the Phos in multi-dimensional electro-catalytic water outlet form iron phosphate, calcium phosphate and aluminum phosphate postprecipitation, obtain supernatant
Precipitation water outlet；
Step 4：Above-mentioned precipitation water outlet is introduced into successively hydrolytic tank, Aerobic Pond and second pond, remaining COD and inorganic is removed
Phosphorus, obtains bio-chemical effluent；
Step 5, above-mentioned bio-chemical effluent is introduced second coagulation sedimentation tank, and add in second coagulation sedimentation tank PAC and
PAM medicaments, obtain supernatant qualified discharge.
2. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：In above-mentioned steps one
Anaerobic tower adopts forth generation anaerobic reactor IC, and it is 40 little that waste water carries out time of staying of anaerobic reaction in anaerobic tower
When -72 hours.
3. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：In described step two
First PH is adjusted to into 3-4 by anaerobic effluent sulphuric acid, in then entering back into multi-dimensional electro-catalytic pond, and is added in multi-dimensional electro-catalytic dense
The hydrogen peroxide for 30% is spent, the addition of hydrogen peroxide is the 3 ‰ -8 ‰ of anaerobic effluent amount, then in 500V unidirectional currents and ferrum carbon filler
Catalysis under, react 3-5 hours, remove COD and destruction organophosphors structure.
4. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：In described step three
The CaO added in a coagulative precipitation tank is 40PPM -80PPM, and the PAC of addition is 300PPM -600PPM, by Phos
Precipitation, one time coagulative precipitation tank surface loading is less than 0.5m3/m2/h。
5. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：Described precipitation water outlet
The hydrolysis time of staying in hydrolytic tank is -18 hours 16 hours, aerobic time of staying in Aerobic Pond is 24 hours -36
Hour, second pond surface loading is less than 1m3/m2/h。
6. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：In described step five
The PAC added in second coagulation sedimentation tank is 300PPM -600PPM, and Phos are precipitated, and second coagulation precipitation pool surface is born
Lotus is less than 0.5m3/m2/h。
7. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：It is described anaerobic tower, many
The precipitate produced in Wei electricity Cui Huachi, coagulative precipitation tank, hydrolytic tank, Aerobic Pond, second pond and a second coagulation sedimentation tank
It is discharged in sludge-tank.
8. a kind of processing method of high COD high phosphorus waste water according to claim 1, is characterized in that：Described second pond is opened
There is the sludge reflux passage that unilaterally connected Aerobic Pond water inlet end reprocesses sludge reflux.
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