CN206624745U - UASB two-stage A/O coagulating treatments pig farm biogas slurry system - Google Patents

UASB two-stage A/O coagulating treatments pig farm biogas slurry system Download PDF

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Publication number
CN206624745U
CN206624745U CN201720197550.6U CN201720197550U CN206624745U CN 206624745 U CN206624745 U CN 206624745U CN 201720197550 U CN201720197550 U CN 201720197550U CN 206624745 U CN206624745 U CN 206624745U
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China
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pond
uasb
sludge
coagulating
biogas slurry
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CN201720197550.6U
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万金保
付煜
余郭龙
刘峰
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Nanchang University
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Nanchang University
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Abstract

A kind of UASB two-stages A/O coagulating treatments pig farm biogas slurry system, consisting of:Regulating reservoir, UASB reactors, one-level anoxic pond, one-level Aerobic Pond, two level anoxic pond, two level Aerobic Pond, medium sediment pool, coagulating basin, second pond, sterilization pool, effluent standard mouth are sequentially connected;UASB reactors, sludge concentration tank, plate and frame filter press are sequentially connected;Medium sediment pool, second pond and coagulating basin are connected with sludge concentration tank, the sludge in three ponds is discharged into sludge concentration tank.The system Nitrogen/Phosphorus Removal is notable, and treatment effect is stable, and capacity of resisting impact load is strong, simple to operate, and operating cost is low, and biogas slurry effluent index after group technology processing in pig farm meets《Livestock and poultry breeding industry pollutant emission standard》(GB 18596‑2001)It is required that.

Description

UASB- two-stage A/O- coagulating treatments pig farm biogas slurry system
Technical field
It the utility model is related to improvement upflow anaerobic sludge blanket reactor i.e. (UASB), two-stage anoxic/aerobic (two-stage A/ ) and coagulation integrated treatment pig farm biogas slurry system, O environmentally friendly water-treatment technology field is belonged to.
Background technology
In recent years, scale animal and poultry cultivation industry in China's develops rapidly, increases income and uplifts the people's living standard in promotion and be same When produce serious environmental pollution.Livestock and poultry breeding industry exhaust emission turns into one of principal element of China's Rural Plane Source Pollution, Also the third-largest pollution sources after industrial wastewater and sanitary sewage are turned into.Statistics shows that national livestock and poultry breeding industry was arranged in 2010 The COD put(COD)1268.26 ten thousand t are reached, the waste water of wherein high concentration caused by Intensive Farm of Pig Raising accounts for Main status.At this stage, the Large-scale pig farm waste water treatment in China has been basically completed Anaerobic Treatment, that is, completes methane-generating pit etc. The construction of anaerobism structures.Acidifying and methanation two benches by anaerobism, the organic matter of piggery wastewater high concentration are substantially achieved Control, eliminate more than 70% COD and killed most pathogenic bacteria.But still contain in caused a large amount of biogas slurries after fermenting There are the rich nutritive materials such as COD and a large amount of ammonia, the phosphorus of higher concentration, if do not handled further, directly discharge the life to periphery State environment forms serious destruction.
At present, kinds of processes have developed to pig farm biogas slurry treatment both at home and abroad, mainly there is Aerobic Process for Treatment, Anaerobic Treatment, nature Processing and returning to the field make fertilizer etc..Pig farm biogas slurry still falls within the organic wastewater of high ammonia nitrogen, and direct Aerobic Process for Treatment, energy consumption is excessive, running cost With height.Suitable scheme should be aerobic combined treatment process after first anaerobism, but still lack at this stage economical rationality, technology into Ripe group technology handles such waste water.Therefore, it is low to find a kind of good denitrogenation and dephosphorization effect, investment and operating cost, because of ground system Preferably, operational administrative is simple, and can produce the group technology of certain economy and environmental benefit, is caused to solving large scale of pig farm waste water Problem of environmental pollution it is particularly important.
The content of the invention
The purpose of this utility model is COD, nitrogen, phosphorus, the pollutant such as suspension for containing high concentration for pig farm biogas slurry, natural pond A kind of the features such as liquid water quality is big with time fluctuation, carbon-nitrogen ratio serious unbalance, and biodegradability is poor, and intractability is big, it is proposed that UASB- Two-stage A/O- coagulating treatments pig farm biogas slurry group technology.Biogas slurry effluent index after group technology processing in pig farm meets 《Livestock and poultry breeding industry pollutant emission standard》(GB 18596-2001)It is required that.
Realizing the technical solution of the utility model is:Utilize UASB reactors, one-level anoxic/aerobic(One-level A/O), two level Anoxic/aerobic(Two level A/O)With coagulation quaternity integrated treatment pig farm biogas slurry.Pig farm biogas slurry is finally arranged from sterilization pool through standard Mouth outflow is put, reaches discharge standard.
The system forms:Regulating reservoir, UASB reactors, one-level anoxic pond, one-level Aerobic Pond, two level anoxic pond, two Level Aerobic Pond, medium sediment pool, coagulating basin, second pond, sterilization pool, effluent standard mouth are sequentially connected;UASB reactors, sludge condensation Pond, plate and frame filter press are sequentially connected;Medium sediment pool, second pond and coagulating basin are connected with sludge concentration tank, are discharged into the sludge in three ponds Sludge concentration tank;
The system work process is as follows:
(1)Pig farm biogas slurry is carried out after being collected by pipe network after coarse rack removes bulky grain excrement slag from inflow regulating reservoir Balanced water quality and water;
(2)Regulating reservoir water outlet is promoted in UASB reactors by elevator pump and carries out Anaerobic Treatment, and biogas slurry passes through secondary hydrolysis Acidifying, organic concentration is greatly lowered, mitigates the processing load of system subsequent technique;
(3)The water outlet of UASB reactors is under gravity from before inflow two-stage A/O biological treatment systems, two-stage A/O techniques After connect, aerobic section sets reflux pump by part mixed-liquor return to respective anoxic section;First order A/O uses activated sludge process Technique, by shortening sludge sludge age and hydraulic detention time, promote polyP bacteria growth, finally utilize spoil disposal method dephosphorization.The second level A/O uses bio membrane process, extends sludge sludge age, is advantageous to the breeding of the denitrifier of generation time length, promotes denitrogenation effect Fruit;
(4)Two-stage A/O pond water outlets are acted on using gravitational settling from medium sediment pool is flowed into and carry out separation of solid and liquid, further removed The biomembrane to be come off in suspension and FEOL, ensure effluent quality;
(5)Medium sediment pool supernatant liquor overflow enters coagulating basin, and adds appropriate PAC, PAM into coagulating basin and dephosphorization agent is ripe The medicaments such as lime make the suspension in waste water form flco, while further reduce COD and TP concentration;
(6)Coagulating basin water outlet enters supernatant after second pond carries out separation of solid and liquid and enters sterilization pool, adds and enters into NaClO Row sterilization, kills Escherichia coli, malignant bacteria and fractionated viral, finally ensures that water outlet meets the requirements qualified discharge;
(7)Sludge concentration tank collects regulating reservoir, UASB reactors, medium sediment pool, coagulating basin and second pond in group technology Sludge;Moisture percentage in sewage sludge is reduced by plate and frame filter press after sludge condensation, then dirty cake outward transport carries out processing disposal.
The utility model has the advantage of:
Improved UASB reactor is to be additionally arranged outer circulation sludge refluxing apparatus on the basis of traditional UASB reactors, it is ensured that Anaerobic sludge is not lost in.Increase the liquid rate of climb in reactor by flowing back simultaneously, improve anaerobic fermentation efficiency, shorten Hydraulic detention time(It is 2014200062588 to improve UASB utility model patent numbers).In addition, the novel cloth that reactor is supporting Mud device and water-locator, wherein cloth mud device, which avoid returned sludge and be directly entered reactor, causes local sludge concentration too high, destroys The activity of anaerobic grain sludge(Utility model patent number 2014200034959), water-locator then plays a part of water distribution uniformity(It is real With new patent number 2014200055279).Most organic pollution in waste water is can remove by UASB reactors, is reduced Water quality ensures subsequent biological treatment technique normal operation to the impact load of subsequent technique.
Two-stage A/0 technique tandems, are respectively adopted activated sludge process dephosphorization and biomembrance process denitrogenation, for polyP bacteria and The different multiplication characteristic of denitrifier, by the operation such as reflux ratio for controlling sludge sludge age, hydraulic detention time, aerobic section mixed liquor Parameter is so as to overcoming traditional A2/ O existing carbon source deficiency, nitrate interference, sludge sludge age during denitrogenation dephosphorizing are difficult to The problems such as taking into account the generation time of denitrifier and polyP bacteria, it is achieved thereby that efficient denitrogenation dephosphorizing.
Coagulating basin has added coagulant PAC, PAM and dephosphorization agent Ca (OH)2So that coagulating sedimentation and chemical dephosphorization form Synergy, improves pollutant removal.
Waste water treatment process operating cost is low, treatment effect is stable, is adapted to large-scale pig farm wastewater treatment and Technique Popularizing.
After group technology is handled, final outflow water water quality is better than biogas slurry《Livestock and poultry breeding industry pollutant emission standard》(GB 18596-2001)It is required that.
Brief description of the drawings
Fig. 1 is UASB- two-stage A/O- coagulating treatments pig farm biogas slurry system schematic.
Embodiment
System described in the utility model forms:Regulating reservoir, UASB reactors, one-level anoxic pond, one-level Aerobic Pond, two level Anoxic pond, two level Aerobic Pond, medium sediment pool, coagulating basin, second pond, sterilization pool, effluent standard mouth are sequentially connected;UASB reactors, Sludge concentration tank, plate and frame filter press are sequentially connected;Medium sediment pool, second pond and coagulating basin are connected with sludge concentration tank, make three ponds Sludge is discharged into sludge concentration tank.
Treating capacity is 100m3/ d pig farm biogas slurry, biogas slurry water quality:CODCr 2850~3000mg/L, NH3- N 750~ 950~1300mg/L of 850mg/L, TP 30~40mg/L, SS.Pig farm biogas slurry enters regulating reservoir after coarse rack, enters water-filling Matter and runoff investigation.Then waste water lifting is subjected to Anaerobic Treatment into UASB reactors by elevator pump, biogas slurry passes through secondary water Solution acidifying, is greatly lowered organic concentration.UASB reactor water outlet CODCr 700~800mg/L, NH3- N 1100~ 300~350mg/L of 1200mg/L, TP 25~30mg/L, SS.Secondly waste water is biological from two-stage A/O is flowed under gravity Processing system, two-stage A/O technique tandems, aerobic section mixed liquor are partly refluxed to anoxic section.First order A/O is dirty using activity Mud method, by shortening sludge sludge age and hydraulic detention time, promote polyP bacteria growth, finally utilize spoil disposal method dephosphorization.The second level A/O uses biomembrance process, using the denitrifier of biomembrane enrichment generation time length, promotes denitrification effect.Two-stage A/O pond water outlets CODCr 300~400mg/L, NH3400~430mg/L of-N 90~110mg/L, TP 8~10mg/L, SS.Then waste water enters Enter medium sediment pool, carry out separation of solid and liquid, further remove oil removal(SS), ensure effluent quality.Medium sediment pool supernatant liquor enters mixed Solidifying reaction tank, and adding the medicaments such as PAC, PAM and white lime makes the suspension in waste water form flco, while further reduce COD and TP concentration;Coagulating basin water outlet CODCr 180~200mg/L, NH3- N 50~70mg/L, TP 3~5mg/L, SS 180~200mg/L;Coagulating basin water outlet enters supernatant after second pond carries out separation of solid and liquid and enters sterilization pool, adds and enters into NaClO Row sterilization, finally ensure that water outlet meets the requirements qualified discharge.Final outflow water water-quality COD Cr 150~180mg/L, NH3- N 40~ 100~130mg/L of 60mg/L, TP 2~3mg/L, SS.In group technology sludge concentration tank mainly collect UASB reactors, in The excess sludge in heavy pond, coagulating basin and second pond.After sludge condensation moisture percentage in sewage sludge, subsequent dirty cake are reduced by plate and frame filter press Outward transport carries out processing disposal.

Claims (1)

1. a kind of UASB- two-stages A/O- coagulating treatments pig farm biogas slurry system, consisting of:Regulating reservoir, UASB reactors, one-level lack Oxygen pond, one-level Aerobic Pond, two level anoxic pond, two level Aerobic Pond, medium sediment pool, coagulating basin, second pond, sterilization pool, effluent standard mouth It is sequentially connected;UASB reactors, sludge concentration tank, plate and frame filter press are sequentially connected;Medium sediment pool, second pond and coagulating basin and sludge Concentration basin connects, and the sludge in three ponds is discharged into sludge concentration tank.
CN201720197550.6U 2017-03-02 2017-03-02 UASB two-stage A/O coagulating treatments pig farm biogas slurry system Expired - Fee Related CN206624745U (en)

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CN201720197550.6U CN206624745U (en) 2017-03-02 2017-03-02 UASB two-stage A/O coagulating treatments pig farm biogas slurry system

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