CN207877509U - A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage - Google Patents

A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage Download PDF

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CN207877509U
CN207877509U CN201721732015.2U CN201721732015U CN207877509U CN 207877509 U CN207877509 U CN 207877509U CN 201721732015 U CN201721732015 U CN 201721732015U CN 207877509 U CN207877509 U CN 207877509U
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pond
sludge
pipeline
carbon
denitrification
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李光辉
刘军
徐兰
李媛
张志航
潘冠言
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Guangzhou Yuntai Electric Power Complete Equipment Co.,Ltd.
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Guangdong Thousand Environment And Energy Conservation Technology Research Institute Co Ltd
Guangzhou National Institute Of Environment And Energy Conservation
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Abstract

The utility model discloses a kind of devices of the intensified denitrification and dephosphorization of low-carbon-source sewage.This device includes biological adsorption pond, sedimentation basin, nitration reaction pond, anoxic denitrification pond, secondary aeration tank and the secondary settling tank being sequentially connected by pipeline, further includes sludge regenerated reactor;It is equipped with blender in biological adsorption pond and anoxic denitrification pond;Biological adsorption pond is connected by pipeline with short generation sludge throwing device;The deposit outlet of sedimentation basin bottom is connected with sludge regenerated reactor and anoxic denitrification pond respectively by pipeline, and sludge regenerated reactor is connected by pipeline with biological adsorption pond;The sludge outlet of secondary settling tank bottom is connected by pipeline with nitration reaction pond;Nitration reaction pond, secondary aeration tank and sludge regenerated reactor are equipped with aerator.The processing that low-carbon-source sewage is carried out by using utility model device, can improve its utilization of carbon source efficiency, strengthen its biological carbon and phosphorous removal ability, can reduce sewage treatment plant's operating cost.

Description

A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage
Technical field
The utility model is related to a kind of devices of the intensified denitrification and dephosphorization of low-carbon-source sewage.
Background technology
N, the nutritive salt such as P are the earth's surfaces water eutrophication key factors such as lake, river, reservoir, as country is to water pollution Management is reinforced, sewage disposal plant effluent total nitrogen, total phosphorus control will be increasingly stringent.
In sewage treatment plant's secondary biochemical treatment technique, TN, TP remove ability and carbon source is in close relations, it is considered that, BOD/TN is more than 4, BOD/TP and is more than 20, is the primary condition of biological carbon and phosphorous removal, lacks in carbon source, especially high-quality carbon source (BOD) under conditions of lacking, no matter which kind of secondary biochemical treatment technique is used, is difficult to realize TN, TP index qualified discharge, it is dirty Water treatment plant's secondary biochemical treatment system water-inlet carbon source, especially high-quality carbon source concentration are that it is discharged being critical to for TN, TP control Element.
Due to sewage collecting, major part urban wastewater treatment firm water inlet in China's is asked there are carbon source is insufficient mostly Topic, many sewage plant BOD/TN are less than 4, and such as the urban wastewater treatment firm investigation of 56, Pearl River Delta, average BOD/TN is 3.3, hence it is evident that Less than the BOD/TN needed for biological denitrificaion.If not improving water-inlet carbon source concentration, the stably reaching standard for being discharged TN, TP will certainly be influenced Discharge.
It includes following four that utilization of carbon source efficiency method improves mainly in sewage treatment plant at present:One, cancel or part is closed Primary sedimentation tank makes its overload operation, reduces primary sedimentation tank runnability, increases water inlet suspended organic matter amount, increases carbon source;Two, it sets Sludge pipeline is set, part Sludge from primary sedimentation tank is pumped into secondary biochemical system;Three, it increases primary sludge anaerobic fermentation facility newly, will send out Sludge after ferment is pumped into secondary biochemical system;Four, it increases excess sludge digestion facility newly, excess sludge is digested into supernatant as carbon Source feeds secondary biochemical system.Although method one can increase part carbon source, increased carbon source is suspension COD, and biodegradability is poor, It is not high-quality carbon source to denitrification dephosphorization technique;Two carbon source property of method and method one, to secondary biochemical system hardening denitrogenation dephosphorizing Efficiency effect is little;Method three needs to add anaerobic fermentation pond, needs the 3-4d residence times, and investment is big, and primary sedimentation tank deposits Electrodeless ingredient is higher in object, and even across anaerobic fermentation processing, high-quality carbon source amount is also extremely limited;Method four increases excess sludge newly Supernatant is digested in addition to COD, also contains higher TN and TP, is supplemented as carbon source, can also be increased TN, TP of water inlet to a certain extent Load.In fact, utilization of carbon source efficiency method improves mainly for suspended particle absorbing control in wastewater influent in existing sewage treatment plant Organic matter or excess sludge digestion of organic matter improve its utilization ratio without considering colloidal organic matter hydrolysis acidification in sewage.
Utility model content
The purpose of the utility model is to overcome the deficiencies that utilization of carbon source efficiency method improves in existing sewage treatment plant, thus A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage is provided, which both can be applied to existing sewage treatment plant and propose mark dilatation Transformation, it can also be used to newly-built integrated sewage disposal module.
Low-carbon-source sewage described in the utility model refers to that BOD/TN is less than 4 in sewage.
Technical solution adopted in the utility model is:
A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage, include the biological adsorption pond being sequentially connected by pipeline, Sedimentation basin, nitration reaction pond, anoxic denitrification pond, secondary aeration tank and secondary settling tank further include sludge regenerated reactor;
It is equipped with blender in biological adsorption pond and anoxic denitrification pond;
Biological adsorption pond is connected by pipeline with short generation sludge throwing device;
Sedimentation basin bottom is exported equipped with deposit, the outlet of the deposit of sedimentation basin by pipeline respectively with sludge regenerated reactor and Anoxic denitrification pond is connected, and sludge regenerated reactor is connected by pipeline with biological adsorption pond;
Secondary settling tank bottom is equipped with sludge outlet, and the sludge outlet of secondary settling tank is connected by pipeline with nitration reaction pond;
Nitration reaction pond, secondary aeration tank and sludge regenerated reactor are equipped with aerator.
In device, the top of sedimentation basin is equipped with effluent weir, and effluent weir is connected by pipeline with nitration reaction pond.
In device, the sludge outlet of secondary settling tank is connected by pipeline with sludge storage pool.
In device, aerator is connected by pipeline with wind turbine.
The utility model has the beneficial effects that:
The processing that low-carbon-source sewage is carried out by using utility model device, can improve its utilization of carbon source efficiency, strengthen Its biological carbon and phosphorous removal ability, can reduce sewage treatment plant's operating cost.
It is specific as follows:
1, it is acted on by the biological adsorption of short generation special type sludge, it is rich by the absorption of 60% or more organic matter, flocculation in sewage It combines in deposit, and is hydrolyzed, is acidified, improve organic matter utilization ratio, cancel primary sedimentation tank, suspended organic matter is made also to be able to It makes full use of.
2, by biological adsorption system, 60% or more organic matter is enriched in deposit, and 90% ammonia nitrogen is then positioned at upper In clear liquid, realizes C-N in sewage and detach, since supernatant C OD contents are low so that nitration reaction efficiency greatly improves.
3, be conducive to nitration reaction since COD contents are low by biological adsorption system supernatant, pass through efficient IFAS high Nitration reaction system is imitated, can be nitrified rapidly, is nitrate by ammonium oxidation, greatly shortens the nitration reaction residence time.
4, it is mixed with nitrification liquid as carbon source by biological adsorption system deposit, organic matter carries out anti-in anoxic pond Denitrogenation is nitrified, due to carbon source abundance, denitrification efficiency is greatly improved, keeps denitrification denitrogenation more thorough.
5, biological adsorption sludge generation section, after anaerobic-aerobic selects, microorganism has the function of PAO, into anoxic pond With secondary aeration tank, phosphorus is excessively taken the photograph, realizes that denitrification dephosphorization, a carbon two are used, further saves carbon source.
6, due in the present apparatus sewage COD mainly removed by denitrification, reduce COD biological oxidation process removal shared by Ratio, while saving aeration, denitrification process sludge output is far below biological oxidation process;This system totality sludge yield ratio Conventional sewage processing system reduces by 30%, reduces sewage treatment plant's operating cost.
Description of the drawings
Fig. 1 is the schematic diagram of utility model device.
Specific implementation mode
A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage, include the biological adsorption pond being sequentially connected by pipeline, Sedimentation basin, nitration reaction pond, anoxic denitrification pond, secondary aeration tank and secondary settling tank further include sludge regenerated reactor;
It is equipped with blender in biological adsorption pond and anoxic denitrification pond;
Biological adsorption pond is connected by pipeline with short generation sludge throwing device;
Sedimentation basin bottom is exported equipped with deposit, the outlet of the deposit of sedimentation basin by pipeline respectively with sludge regenerated reactor and Anoxic denitrification pond is connected, and sludge regenerated reactor is connected by pipeline with biological adsorption pond;
Secondary settling tank bottom is equipped with sludge outlet, and the sludge outlet of secondary settling tank is connected by pipeline with nitration reaction pond;
Nitration reaction pond, secondary aeration tank and sludge regenerated reactor are equipped with aerator.
Preferably, in device, the top of sedimentation basin is equipped with effluent weir, and effluent weir is connected by pipeline with nitration reaction pond It connects.
Preferably, in device, the sludge outlet of secondary settling tank is connected by pipeline with sludge storage pool.
Preferably, in device, aerator is connected by pipeline with wind turbine.
Short generation sludge throwing device is the sludge throwing device for age being 0.3 day~0.8 day.
Technical solution described in the utility model is further illustrated:
Dirty Organic substance in water includes mainly dissolved organic matter, colloidal organic matter and suspended organic matter, and wherein colloid is organic Object and suspended organic matter account for about 60% or more sewage total organic content, by biological adsorption, can be enriched with most of organic matter In deposit, and the hydrolysis of adsorption process, acidification, this partial organic substances biodegradability will be greatly improved.Pass through biology Adsorption system detaches COD in sewage and ammonia nitrogen.At this point, most of organic matter is attracted in deposit, and supernatant is then led It to be made of ammonia nitrogen and a small amount of organic matter, while the supernatant gravity flow of high ammonia nitrogen, low organic matter enters high efficiency nitrification reactor. High efficiency nitrification reactor uses IFAS techniques:This technique retains nitrobacteria by the biomembrane of suspending carrier, since water inlet has Machine matter content is relatively low so that system nitration reaction efficiency is higher, while being by the ammonium oxidation in biological adsorption system supernatant Nitrate;Nitrification liquid gravity flow enters anoxic pond, and biological adsorption system deposit also enters anoxic pond as carbon source, carries out denitrification Reaction nitrifies the COD in sewage while thus removing TN in decontaminated water;In addition, biological adsorption system anaerobic-aerobic replaces ring Border is enriched with PAO, and denitrification dephosphorization is carried out in anoxic pond;Sewage finally flows automatically into secondary aeration after denitrification for Removing Nitrogen Pond removes the N loaded on rest COD and ammonia nitrogen and sludge2, improve sludge settling property;Last muddy water mixed solution enters Secondary settling tank, after precipitation, part settled sludge is back to high efficiency nitrification pond, is arranged outside excess sludge.
The content of the utility model is described in further detail below by way of specific embodiment.
Embodiment:
Attached drawing 1 is the schematic diagram of utility model device.In Fig. 1,1- biological adsorptions pond, 2- biological adsorptions pond blender, The short generation sludge throwing devices of 3-, 4- sedimentation basins, 5- sedimentation basin effluent weirs, the outlet of 6- sedimentation basin deposits, 7- sludge regenerated reactors, 8- sludge regenerated reactor aerators, 9- nitration reactions pond, 10- nitration reactions pond aerator, 11- anoxic denitrifications pond, 12- are lacked Oxygen denitrification pond blender, bis- aeration tanks 13-, bis- aeration tank aerators of 14-, 15- secondary settling tanks, 16- secondary settling tank sludge Outlet, 17- sludge storage pools, 18- wind turbines.
The device of 1 pair of the utility model is further described below in conjunction with the accompanying drawings.A kind of reinforcing of low-carbon-source sewage is de- The device of nitrogen dephosphorization includes the biological adsorption pond (1) being sequentially connected by pipeline, sedimentation basin (4), nitration reaction pond (9), anoxic Denitrification pond (11), secondary aeration tank (13) and secondary settling tank (15) further include sludge regenerated reactor (7);In biological adsorption pond (1) Equipped with blender (2), blender (12) is equipped in anoxic denitrification pond (11);Biological adsorption pond (1) passes through pipeline and short generation Sludge throwing device (3) is connected;Sedimentation basin (4) bottom is equipped with deposit and exports (6), and the deposit outlet (6) of sedimentation basin is logical Piping is connected with sludge regenerated reactor (7) and anoxic denitrification pond (11) respectively, and sludge regenerated reactor (7) passes through pipeline and biology Adsorption tank (1) is connected;Secondary settling tank (15) bottom is equipped with sludge outlet (16), and the sludge outlet (16) of secondary settling tank passes through pipeline It is connected with nitration reaction pond (9);Nitration reaction pond (9) is equipped with aerator (10), and secondary aeration tank (13) is equipped with aeration and fills It sets (14), sludge regenerated reactor (7) is equipped with aerator (8).In device, the top of sedimentation basin (4) is equipped with effluent weir (5), water outlet Weir (5) is connected by pipeline with nitration reaction pond (9);The sludge outlet (16) of secondary settling tank (15) is stored by pipeline and sludge Pond (17) is connected;Aerator (8), (10) and (14) is connected by pipeline with wind turbine (18).
It makes biological adsorption pond (1), dischargeable capacity volume 20L, setting blender (2), when system starts, biological adsorption pond (1) extraordinary activated sludge (0.3~0.8d of sludge age) is added by short generation sludge throwing device (3), MLSS is made to reach 6000mg/ L or more;Sewage enters biological adsorption pond (1), is mixed with sludge regenerated reactor (7) returned sludge, makees in the stirring of blender (2) Under, abundant mass transfer mixing, biological adsorption pond (1) residence time is 30min, and sludge concentration is made to remain at 3000mg/L More than;By the mixing of abundant mass transfer, absorption, flocculated sewage and mud mixture, gravity flow enters sedimentation basin (1), sedimentation basin (4) design surface load is 2m/h, and by the hydrolysis of sedimentation basin, acidification, flocculation and precipitation, most of organic matter is adsorbed In deposit, supernatant is then collected by effluent weir (5), and ammonia nitrogen is primarily present in supernatant, and it is anti-to enter high efficiency nitrification System, a part of deposit is answered to be pumped to anoxic denitrification system as carbon source;Another part deposit is then pumped to sludge Regenerated reactor (7);Wherein, micro-pore aeration system is arranged in sludge regenerated reactor (7), and is aerated to it by wind turbine (18), makes dirt Dissolved oxygen in mud regenerated reactor (7) reaches 3-4mg/L, and the residence time of sludge regenerated reactor (7) is 20min, is regenerated by sludge The sludge and sewage of pond (7) Air Exposure mix, and enter back into biological adsorption pond (1), sludge regenerated reactor (7) sludge back flow quantity is to protect Biological adsorption pond (1) sludge concentration is held to reach subject to 3000mg/L.
It is 80L that high efficiency nitrification system, which uses IFAS techniques, nitration reaction pond (9) dischargeable capacity, is thrown by 15% (volumetric ratio) The polyurethane sponge carrier of loading 20-30% Powdered Activated Carbons, setting micro-pore aeration system (10) in nitration reaction pond (9), Dissolved oxygen in (9) is set to reach 4mg/L or more.The gravity flow of biological adsorption system supernatant enters high efficiency nitrification pond (9) and secondary settling tank (15) ammonia nitrogen in sewage is oxidized to nitrate by returned sludge mixing, and the residence time of nitration reaction pond (9) is 2h, reaction Nitrification mixed liquor enters anoxic denitrification pond (11) afterwards.
Blender (12) is arranged in anoxic denitrification pond (11), and nitrification mixed liquor gravity flow enters (11), and as carbon source and contains Have PAO biological adsorption system deposit mix, carry out denitrification denitrogenation and denitrifying phosphorus uptake reaction, synchronize denitrogenation and Dephosphorization.The reaction tank residence time is 2h, and mixed liquor enters secondary aeration tank (13) after reaction.
Secondary aeration tank (13) mainly removes the N loaded on rest COD, ammonia nitrogen and sludge2, to improve sludge settling Energy.Setting micro-pore aeration system (14), residence time 0.5h, the mixed liquor after reaction enter secondary settling tank (15) in pond (13). After precipitation, part settled sludge is back to high efficiency nitrification pond (9), and sludge storage pool (17) is drained into outside excess sludge.
The present embodiment device run total residence time be 5h, wherein biological adsorption pond 0.5h, aerobic nitrification pond 2h, anoxic Pond 2h, secondary aeration tank 0.5h.
After system is stablized, continuous operation 10 days takes a sample daily, surveys water inlet, water outlet COD, ammonia nitrogen, TN, TP is equivalent, takes Average value, test data are as shown in table 1.
The Inlet and outlet water index of 1 embodiment of table
Index It intakes (mg/L) It is discharged (mg/L)
COD 215.3 30.6
BOD 137.5 11.2
NH4-N 32.3 0.35
TN 40.5 8.4
TP 6.2 0.48
The present embodiment water inlet indices are aerobic using absorption-nitrification-denitrification-substantially close to conventional municipal sewage (AOAO) technique is handled.
Sewage is can be seen that after biological adsorption reactor realizes the separation of COD and ammonia nitrogen from the test data of table 1, Treatment effeciency greatly improves, and ammonia nitrogen only needs 2h, you can is down to 1mg/L or less;After settled sludge is supplemented as carbon source, denitrification Efficiency improves, it is only necessary to 2h, you can TN is down to 10mg/L hereinafter, due to biological adsorption pond enriched PAO, with settled sludge Into after anoxic and secondary aeration tank, phosphate in a large amount of absorption effluents makes water outlet TP reach 0.48mg/L, when system always stops Between less than 8h, water outlet reaches level-one A standards, in the case where BOD/TN is down to 2.2, realizes high-efficient denitrification and dephosphorization, utilization of carbon source Efficiency greatly improves.System gas-water ratio is down to 4:1, more conventional A2/ O reduces 10-20%, the more conventional A of sludge yield2/ O is reduced 30% or more, thus the utility model is a kind of energy saving, emission reduction sewage-treatment plant.

Claims (4)

1. a kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage, it is characterised in that:It include the life being sequentially connected by pipeline Object adsorption tank, sedimentation basin, nitration reaction pond, anoxic denitrification pond, secondary aeration tank and secondary settling tank further include sludge regenerated reactor; It is equipped with blender in biological adsorption pond and anoxic denitrification pond;Biological adsorption pond passes through pipeline and short generation sludge throwing device It is connected;Sedimentation basin bottom is exported equipped with deposit, the outlet of the deposit of sedimentation basin by pipeline respectively with sludge regenerated reactor and Anoxic denitrification pond is connected, and sludge regenerated reactor is connected by pipeline with biological adsorption pond;Secondary settling tank bottom goes out equipped with sludge Mouthful, the sludge outlet of secondary settling tank is connected by pipeline with nitration reaction pond;Nitration reaction pond, secondary aeration tank and sludge regeneration Pond is equipped with aerator.
2. a kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage according to claim 1, it is characterised in that:Sedimentation basin Top be equipped with effluent weir, effluent weir is connected by pipeline with nitration reaction pond.
3. a kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage according to claim 1, it is characterised in that:Secondary settling tank Sludge outlet be connected with sludge storage pool by pipeline.
4. a kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage according to claim 1, it is characterised in that:Aeration dress It sets and is connected with wind turbine by pipeline.
CN201721732015.2U 2017-12-12 2017-12-12 A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage Active CN207877509U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111499110A (en) * 2020-04-29 2020-08-07 河北省水文工程地质勘查院 Saline-alkali soil brackish water large-scale utilization system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111499110A (en) * 2020-04-29 2020-08-07 河北省水文工程地质勘查院 Saline-alkali soil brackish water large-scale utilization system

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Effective date of registration: 20210527

Address after: 510663 502-2, No.5 Tianfeng Road, Luogang District, Guangzhou City, Guangdong Province (office use only)

Patentee after: Guangzhou Yuntai Electric Power Complete Equipment Co.,Ltd.

Address before: 510663 5 building, Qiming mansion, 5 Tianfeng Road, Science Development Zone, Guangzhou, Guangdong

Patentee before: GUANGZHOU GUOQIAN ENVIRONMENTAL AND ENERGY SAVING TECHNOLOGY Research Institute

Patentee before: GUANGDONG GUOQIAN ENVIRONMENTAL AND ENERGY SAVING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd.