CN110127941A - A kind of biological and chemical method coupling denitrification dephosphorization technique and processing equipment - Google Patents

A kind of biological and chemical method coupling denitrification dephosphorization technique and processing equipment Download PDF

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Publication number
CN110127941A
CN110127941A CN201910416852.1A CN201910416852A CN110127941A CN 110127941 A CN110127941 A CN 110127941A CN 201910416852 A CN201910416852 A CN 201910416852A CN 110127941 A CN110127941 A CN 110127941A
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China
Prior art keywords
pond
tank
dephosphorization
anoxic
aerobic
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CN201910416852.1A
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Chinese (zh)
Inventor
高祥
马保龙
张娇
赵福鹤
段清乐
李庆祥
张丹妮
刘永刚
崔荣英
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BEIJING CITY HIGHWAY TRAFFIC ENGINEERING Co Ltd
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BEIJING CITY HIGHWAY TRAFFIC ENGINEERING Co Ltd
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Priority to CN201910416852.1A priority Critical patent/CN110127941A/en
Publication of CN110127941A publication Critical patent/CN110127941A/en
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    • 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
    • C02F3/30Aerobic and anaerobic 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
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • 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
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/308Biological phosphorus removal
    • 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
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • C02F2201/007Modular design
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections

Abstract

The invention discloses a kind of biological and chemical method coupling denitrification dephosphorization technique and processing equipments, including main road technique and bypass dephosphorization process;Main road technique is that sewage enters selection pond after anaerobism, after the water outlet of selection pond flows into anoxic pond and enters Anoxic/Aerobic pond with the progress denitrogenation of the phegma of aerobic tank, after aerobic tank phegma again denitrogenation, water outlet enters aerobic tank, after mud mixture in aerobic tank is separated in secondary settling tank, discharged after flowing into clear water reserviors;Mixed liquor in anoxic pond is back to anaerobic pond;Secondary settling tank sludge is back to selection pond, the regular discharge system of excess sludge through reflux pump;Bypass dephosphorization process be, anaerobic pond a part water outlet flow into primary sedimentation tank by the road, in primary sedimentation tank carry out mud-water separation after, in supernatant phosphorus-containing compound in dephosphorization pond with NaOH and MgCl2After reaction, guanite precipitating is formed in sedimentation basin;Sludge reflux maintains the sludge concentration of technique to anoxic pond in primary sedimentation tank, and supernatant flows back into system anaerobic pond front end or conditioning tank.

Description

A kind of biological and chemical method coupling denitrification dephosphorization technique and processing equipment
Technical field
The present invention relates to technical field of sewage, more particularly to a kind of biological and chemical method coupling denitrogenation dephosphorizing Technique.
Background technique
A2O method is also known as AAO method, is the abbreviation (anaerobic-anoxic-of English Anaerobic-Anoxic-Oxic first letter Aerobic method), be a kind of common sewage treatment process, because will detest/aerobic dephosphorization system and lack/aerobic nitrogen removal combines, It is the fundamental technology of biological carbon and phosphorous removal, BOD, nitrogen and phosphorus in water removal can be removed simultaneously, realizes synchronous denitrification dephosphorizing function.
The hydraulic detention time of the technique is less than other similar techniques, under the conditions of anaerobism, anoxic, aerobic alternate run, Der Pilz cannot largely be proliferated, and be not susceptible to the phosphorous height of sludge filamentous bulking sludge, have higher fertilizer efficiency.
But because of traditional A2In O technique, the generation time of denitrifying bacterium is long, and there is contradictions between dephosphorization bacterial, is running When be difficult ensure denitrification effect.Carrying dissolved oxygen in technique in secondary settling tank returned sludge causes anaerobic bacteria to be difficult to survive, and makes dephosphorization Effect is poor;And the nitrate nitrogen brought into anaerobic zone due to returned sludge fights for carbon source, so that polyP bacteria is released phosphorus insufficient, then influences The growth of polyP bacteria in aerobic zone causes its suction phosphorus effect undesirable, further results in sewage treatment process and be difficult to reach synchronous Denitrogenation dephosphorizing.At the same time, for the town domestic sewage in China in the prevalence of carbon source deficiency, carbon, nitrogen, phosphorus nutrition are out of proportion Situation, thus caused Nitrogen/Phosphorus Removal will further deteriorate, and directly affect A2The outlet effect of O technique and the technique Urgent problem to be solved.
In addition, A2Part of the O technique in operation just beyond design total phosphorus concentration cannot achieve removal, and cause in anaerobism The excessive consumption of releasing phosphorus act on caused by COD of the part because of thermophilic phosphorus bacterium.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of biological and chemical method coupling denitrification dephosphorization technique and places Manage equipment.
To achieve the above object, the technical solution adopted by the present invention is specific as follows:
A kind of biological and chemical method coupling denitrification dephosphorization technique, including main road technique and bypass dephosphorization process;
After the main road technique is specifically, sewage enters anaerobic pond, selection pond is entered after anaerobic processes, selects pond water outlet Anoxic pond is flowed into, is lacked in anoxic pond with the reflux ratio of aerobic tank to enter after the phegma progress denitrification reaction of 200-300% After oxygen aerobic tank, and with aerobic tank reflux ratio in the phegma again after denitrogenation of 50-100%, water outlet, which enters aerobic tank, to be had The degradation of machine object after the mud mixture in aerobic tank is separated in secondary settling tank, flows into clear water reserviors discharge;In anoxic pond Mixed liquor is back to anaerobic pond with the reflux ratio of 50-100%;Secondary settling tank sludge is back to choosing through reflux pump with reflux ratio 100% Select pond, the regular discharge system of excess sludge;
Dephosphorization process is bypassed specifically, the 10-20% of anaerobic pond water outlet is flowed into primary sedimentation tank by sewage pump, in primary sedimentation tank Interior supernatant is overflowed by primary sedimentation tank top overflow weir after 2 hours precipitatings, is flowed into dephosphorization pond through catch basin collection;On Clear liquid under stiring, flows into after reacting 30 minutes with the magnesium chloride solution of the sodium hydroxide of 0.1-0.2mol/L and 1.5-2.5g/L In sedimentation basin, the deposit for forming guanite was reacted by 1 hour in sedimentation basin, realizes bypass dephosphorization;The dirt of primary sedimentation tank The 10%-30% reflux ratio that mud bypasses dephosphorization flow through pumping is back to the sludge concentration that anoxic pond maintains technique, and guanite is heavy Starch is periodically transported outward.
The processing equipment that denitrification dephosphorization technique of the present invention uses, including be sequentially connected by pipeline anaerobic pond, Select pond, anoxic pond, Anoxic/Aerobic pond, aerobic tank, secondary settling tank and clear water reserviors;The anaerobic pond also passes through pipeline and primary sedimentation tank phase Even, the primary sedimentation tank is connected with dephosphorization pond and anoxic pond respectively;The dephosphorization pond is connected with sedimentation basin.
Wherein, the dephosphorization pond is connected with chemical feed pipe;The Anoxic/Aerobic pond and aerobic tank are respectively connected with aeration tube;It is described Aeration tube is connected with the air blower being set in equipment room;The anaerobic pond, selection pond, anoxic pond, Anoxic/Aerobic pond, aerobic tank, Primary sedimentation tank, dephosphorization pond and sedimentation basin are connected with blow-down pipe;The blow-down pipe accesses conditioning tank;The anaerobic pond and anoxic pond it Between be equipped with sewage backflow pipe;Sewage backflow is equipped between the anoxic pond and aerobic tank, between Anoxic/Aerobic pond and aerobic tank Pipe;Mud return line is equipped between selection pond and the secondary settling tank;Overflow pipe is equipped between the aerobic tank and secondary settling tank;It is described Clear water reserviors outlet is equipped with outlet pipe.
Compared with the existing technology, protrusion effect of the invention is:
(1) present invention enhances denitrification dephosphorization function using sludge reflux to pond is selected.And the present invention is in front equipment end Bypass dephosphorization is increased, the concentration of total phosphorus in process is controlled.
(2) invention increases aerobic tanks to the reflux in Anoxic/Aerobic pond, effectively realize simultaneous nitrification and denitrification in the unit Nitrification function, strengthened denitrification effect, water outlet total nitrogen control is in 10m/L or less.
Explanation and specific embodiment are to biological and chemical method coupling denitrogenation dephosphorizing work of the invention with reference to the accompanying drawing Skill is described further.
Detailed description of the invention
Fig. 1 is the process flow chart of biological and chemical method coupling denitrification dephosphorization technique of the present invention;
Fig. 2 is overall structure figure of the present invention for the sewage disposal device of domestic sewage denitrifying-dephosphorizing;
Fig. 3 is piping diagram of the present invention for the sewage disposal device of domestic sewage denitrifying-dephosphorizing;
Fig. 4 is aerobic tank aerated conduit plan view;
Fig. 5 is Anoxic/Aerobic pond aerated conduit plan view.
Specific embodiment
Embodiment 1
As shown in Figure 1, a kind of biological and chemical method coupling denitrification dephosphorization technique, including main road technique and bypass dephosphorization Technique;
After main road technique is specifically, sewage enters anaerobic pond, selection pond is entered after anaerobic processes, pond water outlet is selected to flow into Anoxic pond is good to enter anoxic after the phegma progress denitrification reaction of 200-300% with the reflux ratio of aerobic tank in anoxic pond Behind oxygen pond, and with aerobic tank reflux ratio in the phegma again after denitrogenation of 50-100%, water outlet enters aerobic tank and carries out organic matter Degradation, after the mud mixture in aerobic tank is separated in secondary settling tank, flow into clear water reserviors discharge;Mixing in anoxic pond Liquid is back to anaerobic pond with the reflux ratio of 50-100%;Secondary settling tank sludge is back to selection pond through reflux pump with reflux ratio 100%, The regular discharge system of excess sludge;
Dephosphorization process is bypassed specifically, the 10-20% of anaerobic pond water outlet is flowed into primary sedimentation tank by sewage pump, in primary sedimentation tank Interior supernatant is overflowed by primary sedimentation tank top overflow weir after 2 hours precipitatings, is flowed into dephosphorization pond through catch basin collection;On Clear liquid under stiring, flows into after reacting 30 minutes with the magnesium chloride solution of the sodium hydroxide of 0.1-0.2mol/L and 1.5-2.5g/L In sedimentation basin, guanite sedimentation is completed by reaction in 1 hour in sedimentation basin, realizes bypass dephosphorization;The sludge of primary sedimentation tank is through pumping It is back to the sludge concentration that anoxic pond maintains technique to bypass the 10%-30% reflux ratio of dephosphorization flow, guanite sediment is fixed Phase outward transport.
Water-in and water-out water quality after the design water-in and water-out water quality indicator and practical application of this technique is referring to table 1-2.
The design water-in and water-out water quality indicator of 1 technique of table
The practical water-in and water-out water quality of 2 techniques of table
The practical water-in and water-out water quality of 3 techniques of table and tradition A2O technique water-in and water-out water quality contrast table
As shown in Figure 2-5, sewage disposal device used in the treatment process, including the anaerobic pond being sequentially connected by pipeline 4, pond 5, anoxic pond 6, Anoxic/Aerobic pond 7, aerobic tank 8, secondary settling tank 12 and clear water reserviors 13 are selected;The anaerobic pond 4 also passes through pipe Road is connected with primary sedimentation tank 9, and the primary sedimentation tank 9 is connected with dephosphorization pond 10 and anoxic pond 6 respectively;The dephosphorization pond 10 and sedimentation basin 11 It is connected.
Dephosphorization pond 10 is connected with chemical feed pipe 302,305.
Anoxic/Aerobic pond 7 and aerobic tank 8 are respectively connected with aeration tube 500;The aeration tube 500 be set to equipment room 3 in Air blower 301 is connected.The aerated conduit of aerobic tank 8 includes the blast pipe 150 being sequentially connected, main pipe 151 and several branch pipes 152, the both ends of every branch pipe 152 are equipped with aeration head 153.The aerated conduit in Anoxic/Aerobic pond 7 includes the blast pipe being connected 150 and main pipe 161, the main pipe 161 is equipped with several aeration heads 162.
Anaerobic pond 4, selection pond 5, anoxic pond 6, Anoxic/Aerobic pond 7, aerobic tank 8, primary sedimentation tank 9, dephosphorization pond 10 and sedimentation basin 11 are connected with blow-down pipe 400;The blow-down pipe 400 accesses conditioning tank 2.
Sewage backflow pipe 600 is equipped between anaerobic pond 4 and anoxic pond 6;Between the anoxic pond 6 and aerobic tank 8, anoxic it is good Sewage backflow pipe is equipped between oxygen pond 7 and aerobic tank 8.
It selects to be equipped with mud return line between pond 5 and secondary settling tank 12;Overflow is equipped between the aerobic tank 8 and secondary settling tank 12 Pipe;The outlet of clear water reserviors 13 is equipped with outlet pipe 130.
Grille well 1 is connected by pipeline with conditioning tank 2, and the conditioning tank 2 is connected with the anaerobic pond 4, the grille well 1 It is interior to be equipped with flase floor 12;The inlet of the grille well 1 is equipped with water inlet pipe 101.
Submersible sewage pump 21 is equipped in conditioning tank 2;The conditioning tank 2 passes through the sewage lifting pipe and anaerobism in equipment room 3 Pond 4 is connected;Sewage lifting pipe is equipped with electromagnetic flowmeter 303;The bottom surface of the conditioning tank 2 is in ramped shaped, and the bottom of pond gradient is 0.02;The bottom of the conditioning tank 2 is connected with spoil disposal blow-down pipe 201.Self-con-tained unit 304 is equipped in equipment room 3.
Mouth of taking a sample to check is equipped in conditioning tank 2, Anoxic/Aerobic pond 7 and secondary settling tank 12.
Grid hand basket and conditioning tank 2 are buried.
Integrated combination equipment is located on the ground, and ground installations outer layer is equipped with attemperator, and material is asbestos material;Entirely set Standby structures use 6mm carbon steel.12 tons of sewage of day processing.Grille well 1, equipment room 3, anaerobic pond 4, selection pond 5, lacks conditioning tank 2 Oxygen pond 6, Anoxic/Aerobic pond 7, aerobic tank 8 and primary sedimentation tank 9, dephosphorization pond 10, sedimentation basin 11, secondary settling tank 12, clear water reserviors 13 are steel Structure covers.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.

Claims (10)

1. a kind of biological and chemical method coupling denitrification dephosphorization technique, it is characterised in that: including main road technique and bypass dephosphorization Technique;
After the main road technique is specifically, sewage enters anaerobic pond, selection pond is entered after anaerobic processes, pond water outlet is selected to flow into Anoxic pond is good to enter anoxic after the phegma progress denitrification reaction of 200-300% with the reflux ratio of aerobic tank in anoxic pond Behind oxygen pond, and with aerobic tank reflux ratio in the phegma again after denitrogenation of 50-100%, water outlet enters aerobic tank and carries out organic matter Degradation, after the mud mixture in aerobic tank is separated in secondary settling tank, flow into clear water reserviors discharge;Mixing in anoxic pond Liquid is back to anaerobic pond with the reflux ratio of 50-100%;Secondary settling tank sludge is back to selection pond through reflux pump with reflux ratio 100%, The regular discharge system of excess sludge;
Bypass dephosphorization process is specifically, the water outlet of anaerobic pond a part flows into primary sedimentation tank by the road, and progress muddy water divides in sedimentation basin From rear, in supernatant phosphorus containg substances in dephosphorization pond with NaOH and MgCl2After reaction, guanite sedimentation is formed in sedimentation basin, Realize bypass dephosphorization;Sludge reflux maintains the sludge concentration of technique to anoxic pond in primary sedimentation tank.
2. biological and chemical method coupling denitrification dephosphorization technique according to claim 1, it is characterised in that: the bypass It bypasses in dephosphorization process, the 10-20% of anaerobic pond water outlet is promoted by sewage pump to be flowed into primary sedimentation tank.
3. biological and chemical method coupling denitrification dephosphorization technique according to claim 2, it is characterised in that: the bypass It bypasses in dephosphorization process, in primary sedimentation tank after 2 hours precipitatings, supernatant is overflowed by primary sedimentation tank top overflow weir, through catchmenting Slot collection is flowed into dephosphorization pond.
4. biological and chemical method coupling denitrification dephosphorization technique according to claim 3, it is characterised in that: described just heavy After supernatant overflow to dephosphorization pond in pond, under stirring, sodium hydroxide and 1.5-2.5g/L with 0.1-0.2mol/L Magnesium chloride solution react 30 minutes after flow into sedimentation basin in.
5. biological and chemical method coupling denitrification dephosphorization technique according to claim 4, it is characterised in that: the precipitating In pond, the mixture of guanite and water realizes guanite and water separation after 1 hour precipitating.
6. biological and chemical method coupling denitrification dephosphorization technique according to claim 5, it is characterised in that: described just heavy The sludge in pond is back to the sludge concentration that anoxic pond maintains technique through pumping the 10%-30% reflux ratio with bypass flow.
7. biological and chemical method coupling denitrification dephosphorization technique according to claim 6, it is characterised in that: the birds droppings Stone sediment is periodically transported outward.
8. biological and chemical method coupling denitrification dephosphorization technique according to claim 7, it is characterised in that: bypass dephosphorization The guanite that technique is formed is as phosphate fertilizer recycling.
9. the processing equipment that denitrification dephosphorization technique described in claim 1-8 uses, it is characterised in that: including passing through pipeline successively Connected anaerobic pond (4), selection pond (5), anoxic pond (6), Anoxic/Aerobic pond (7), aerobic tank (8), secondary settling tank (12) and clear water Pond (13);The anaerobic pond (4) is also connected with primary sedimentation tank (9) by pipeline, the primary sedimentation tank (9) respectively with dephosphorization pond (10) and Anoxic pond (6) is connected;The dephosphorization pond (10) is connected with sedimentation basin (11).
10. processing equipment according to claim 9, it is characterised in that: the dephosphorization pond (10) be connected with chemical feed pipe (302, 305);The Anoxic/Aerobic pond (7) and aerobic tank (8) are respectively connected with aeration tube (500);The aeration tube (500) with set Air blower (301) between standby in (3) is connected;The anaerobic pond (4), selection pond (5), anoxic pond (6), Anoxic/Aerobic pond (7), good Oxygen pond (8), primary sedimentation tank (9), dephosphorization pond (10) and sedimentation basin (11) are connected with blow-down pipe (400);The blow-down pipe (400) connects Enter conditioning tank (2);Sewage backflow pipe (600) are equipped between the anaerobic pond (4) and anoxic pond (6);The anoxic pond (6) is become reconciled Sewage backflow pipe is equipped between oxygen pond (8), between Anoxic/Aerobic pond (7) and aerobic tank (8);The selection pond (5) is heavy with two Mud return line is equipped between pond (12);Overflow pipe is equipped between the aerobic tank (8) and secondary settling tank (12);The clear water reserviors (13) outlet is equipped with outlet pipe (130).
CN201910416852.1A 2019-05-20 2019-05-20 A kind of biological and chemical method coupling denitrification dephosphorization technique and processing equipment Pending CN110127941A (en)

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