CN202369469U

CN202369469U - Circulation anaerobic-sequencing batch type biomembrane-artificial wetland-facultative pond pig raising wastewater treatment system

Info

Publication number: CN202369469U
Application number: CN2011204383122U
Authority: CN
Inventors: 万金保; 胡昌旭; 熊友强; 顾平; 陈琳
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2011-11-08
Filing date: 2011-11-08
Publication date: 2012-08-08
Anticipated expiration: 2021-11-08

Abstract

The utility model discloses a circulation anaerobic-sequencing batch type biomembrane-artificial wetland-facultative pond pig raising wastewater treatment system, which comprises an internal and external circulation anaerobic reactor, a grille, a hydrolyzation and acidification pond, a sequencing batch type biomembrane reactor, an adjusting pond, an artificial wetland and a facultative pond, wherein the grille and the hydrolyzation and acidification pond are arranged in front of the internal and external circulation anaerobic reactor; the adjusting pond is additionally arranged in front of the sequencing batch type biomembrane reactor; the artificial wetland and the facultative pond are constructed behind the sequencing batch type biomembrane reactor; treated pig farm wastewater is discharged from the facultative pond; and the emission standard GB15896-2001 is reached.

Description

Circulation anaerobic-sequencing batch biofilm-artificial swamp-facultative lagoon is handled the waste water system of raising pigs

Technical field

The utility model relates to a kind of combined system of large-scale pig farm wastewater treatment qualified discharge, belongs to the environmental protection water-treatment technology field.

Background technology

Since the last century the nineties; China's Developing of Animal Industry is rapid; The industry of wherein raising pigs is mass-producing, intensification direction progress generally in scale; This pollutent that also just causes its generation discharges with the mode of concentrating relatively, and the natural supporting capacity of local environment head and shoulders above, and then also will cause serious pollution to environment.Show that according to correlative study the waste water of the discharging of raising pigs is mainly by the flushing waste water formation of pig urine (excrement) and pig house, in the waste water COD up to 4500～20000mg/L, TN 550～2100mg/L, NH ₄ ⁺-N 450～1500mg/L, TP 100～330mg/L, visible piggery wastewater belongs to high concentrated organic wastewater, and the content of its nitrogen phosphorus is severe overweight also, and this also is one of major reason that causes body eutrophication.If piggery wastewater directly enters environment without effective processing, can form severe contamination to surface water, underground water, farmland and atmospheric environment, also can cause spreading of parasitosis simultaneously.

Treatment process for the existing waste water of raising pigs mainly includes: anaerobic treatment, aerobic treatment, anaerobic-aerobic combined treatment and technology such as processing naturally.Wherein, anaerobic treatment is lower to the demand of energy, and can produce biogas, but the residual COD of water outlet is higher, can not reach emission standard; The aerobic treatment removal effect is good, but needs energy many, and processing cost is high; The anaerobic-aerobic combination then is the present modal waste water treatment process of raising pigs, and its treatment effect is good, and cost is relatively low, and producing biogas can utilize again, but array mode needs further research; Naturally processing mainly comprises soil processing, oxidation pond and artificial swamp processing, and its construction cost is low, running cost is few, floor space is big.

At present, the processing to the waste water of raising pigs has both at home and abroad formed kinds of processes, but from existing Information integration analysis, the treatment effect of more above-mentioned technologies is not very desirable, or cost is high, investment is big, or treatment effect is not good, can not reach emission standard.Therefore, seek that a kind of treatment effect is good, cost of investment is few, can suit measures to local conditions, even can produce the treatment system of certain economic benefit, particularly important to the pollution problem that solves large scale of pig farm waste water.

Summary of the invention

The purpose of the utility model is the deficiency to prior art, proposes a kind of combined system of handling piggery wastewater, the problems such as wastewater treatment difficulty, expense height of raising pigs with solution.To the characteristics that the piggery wastewater water quality and quantity changes greatly, ammonia-nitrogen content is high, nutritive element is out of proportion; Consider nitrogen, phosphorus content in degree of depth removal organism and the waste water simultaneously, proposed the combined system of inner-outer circulation anaerobic-sequencing batch biofilm-artificial swamp-facultative lagoon processing piggery wastewater.Piggery wastewater can reach GB15896-2001 " livestock and poultry breeding industry pollutant emission standard " requirement after this system handles.

The structure of the utility model comprises: inner-outer circulation anaerobic reactor drum, grid, hydrolysis acidification pool, sequencing batch biofilm reactor, equalizing tank, artificial swamp and facultative lagoon; Grid and hydrolysis acidification pool were set before the inner-outer circulation anaerobic reactor drum; Before sequencing batch biofilm reactor, set up equalizing tank; After sequencing batch biofilm reactor, set up artificial swamp and facultative lagoon, the piggery wastewater of processing is discharged from facultative lagoon, reaches emission standard GB15896-2001.

The utility model is used to handle the piggery wastewater flow process:

1, piggery wastewater from flowing into the collection tube net, behind grid, hydrolysis acidification pool, is removed oarse-grained pollution substance and swimmer in the waste water through pipe trench, improves the biodegradability of waste water;

2, waste water gets into the inner-outer circulation anaerobic reactor drum, through anaerobic digestion effect efficiently, gets into the subsequent adjustment pond after removing most COD;

3, the equalizing tank water outlet gets into sequencing batch biofilm reactor, through the gas blower air feed, carries out nitration reaction at aeration phase, carries out the hypoxic/anaerobic anti-nitration reaction at quiescent phase, thereby the pollutents such as COD, ammonia nitrogen and phosphorus in the waste water are further removed;

4, the water outlet of sequencing batch biofilm reactor is through artificial swamp, gives full play to the physics between living species in the wetland, chemistry, biological triple synergies, removes pollutents such as COD in the waste water, N, P better;

5, artificial wetland effluent qualified discharge after the further denitrogenation dephosphorizing of facultative lagoon is handled.

The advantage of the utility model is:

1. utilize inner-outer circulation anaerobic reactor drum, sequencing batch biofilm reactor, artificial swamp and facultative lagoon quaternity total system, taken into account simultaneously when the inner-outer circulation anaerobic reactor drum need not the additionaling power source and to have enriched coenosis in the good denitrogenation dephosphorizing ability, artificial swamp of efficient detergent power to waste water, sequencing batch biofilm reactor the absorption cleaning ability of pollutent and facultative lagoon advanced treatment ability to pollutent.This combined system handle at IOC+SBBR on the basis of the waste water of raising pigs further improved processing power, reduced energy consumption, reduced reactor drum volume, saved working cost.

2. realize good capacity of resisting impact load and processing power.The available depth of facultative lagoon is 2.0m, and there are three zones in it: upper strata aerobic zone, facultative district, middle level and lower floor's anaerobic zone.In the aerobic zone, algae produces oxygen through photosynthesis, and organism is oxidized decomposition under the effect of aerobic microbiological; In the aerobic area, different oxygen type facultative bacteria can utilize oxygen in water oxygenolysis organism, can not have under the condition of molecular oxygen, with NO again ₃ ^-And CO ₃ ^2-Carry out anaerobic metabolism as electron acceptor(EA); In anaerobic zone, the organism in the sludge blanket is able to decompose NO through anaerobically fermenting ₃ ^-Under the effect of denitrifying bacteria, be converted into N ₂(see figure 2).These multiple synergies just because of facultative lagoon; Facultative lagoon not only can be removed a certain amount of organic pollutant in waste water is raised pigs in processing; Can also remove the organic pollutant of nutritive substance such as phosphorus, nitrogen and some difficult degradation effectively, reducing the processing load of inner-outer circulation anaerobic reactor drum and sequencing batch biofilm reactor, and then better realization to the impact resistance and the processing power of total system; Reduce processing costs, ensure that stable water outlet is up to standard.

3. facultative lagoon be a kind ofly suit measures to local conditions, simple structure, convenient management, working cost be low, the not only economy but also ecological biological treatment facility sewage handled with the helotism system.Adopt the advanced treatment of the artificial swamp+facultative lagoon waste water pattern of raising pigs, make it to pollutent, especially the removal efficiency ratio of nitrogen phosphorus uses the stabilization pond of a certain character to want high separately.

4. the utility model working cost low, reclaim biogas and can utilize again, adequate solution the piggery wastewater Pollutant levels high with raise pigs the low difficult problems of industry profit, applicable to the processing and the integrated use of large-scale pig farm waste water.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the facultative lagoon fundamental diagram.1 upper strata aerobic zone among the figure, 2 middle level aerobic areas, 3 lower floor's anaerobic zones.

Embodiment

The utility model is used for certain large scale of pig farm field, and the water yield is 100m ³/ d, raw water quality are COD6000～10000mg/L, NH ₄ ⁺-N500～1500mg/L, TP40～100mg/L.

1. former water is introduced into hydrolysis acidification pool, and complicated organic pollutant is converted into simple organic pollutant.Water outlet gets into the inner-outer circulation anaerobic reactor drum again, and most of organism that is prone to degraded is able to remove.But because the effect of the releases phosphorus of polyP bacteria under anaerobic environment, TP raises on the contrary to some extent.Effluent quality through Anaerobic processes is following: COD400～1000mg/L, NH ₄ ^+-N500～1500mg/L, TP55～150mg/L.

2. the anaerobism water outlet gets in the sequencing batch biofilm reactor, and further degradation of organic substances is removed NH simultaneously under aerobic condition ₄ ⁺-N and TP.Effluent quality through sequencing batch biofilm reactor is following: COD300～400mg/L, NH ₄ ⁺-N40～80mg/L, TP5～8mg/L.

3. the advanced treatment technology of artificial swamp and facultative lagoon is passed through in water outlet again, and further nutrition such as degradable organic pollutant and nitrogen phosphorus ensure stable effluent quality.Its effluent quality is following: COD 80～180mg/L, NH ₄ ⁺-N 30～50mg/L, TP 4～7mg/L.Effluent quality reaches GB15896-2001 " livestock and poultry breeding industry pollutant emission standard ".

Claims

1. circulation anaerobic-sequencing batch biofilm-artificial swamp-facultative lagoon is handled the waste water system of raising pigs, and it is characterized in that: said system comprises inner-outer circulation anaerobic reactor drum, grid, hydrolysis acidification pool, sequencing batch biofilm reactor, equalizing tank, artificial swamp and facultative lagoon; Before the inner-outer circulation anaerobic reactor drum, grid and hydrolysis acidification pool are set, before sequencing batch biofilm reactor, set up equalizing tank, after sequencing batch biofilm reactor, set up artificial swamp and facultative lagoon.