CN100336743C - Jet-flow aeration biological filtering tank - Google Patents
Jet-flow aeration biological filtering tank Download PDFInfo
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- CN100336743C CN100336743C CNB2005100250756A CN200510025075A CN100336743C CN 100336743 C CN100336743 C CN 100336743C CN B2005100250756 A CNB2005100250756 A CN B2005100250756A CN 200510025075 A CN200510025075 A CN 200510025075A CN 100336743 C CN100336743 C CN 100336743C
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- filtering tank
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The present invention relates to a jet-flow aeration biological filtering tank which is composed of a biological oxidation filtering tank, a backflushing water pump, a jet-flow aerator, a circulation water pump and a connection pipeline, wherein a supporting board is arranged in the biological oxidation filtering tank to support a supporting layer and a filtering material layer. A water inlet is positioned on the lower part of the filtering material layer, and a water outlet is positioned on the upper part of the filtering material layer. A backflushing water discharge pipe is arranged above the filtering material layer. A settling zone on the lower part of the supporting board is communicated with the backflushing water pump and the circulation water pump which is communicated with the jet-flow aerator which is connected with the biological oxidation filtering tank. The present invention creates an adaptable microbe growing environment for biological oxidation filtration by the oxygenation of the jet-flow aerator and the water power circulation. Thereby, organic substances in sewage are decomposed. Moreover, an aerobic area and an anoxic area in the biological filtering tank remove nitrogenous substances in the sewage by the nitrifying action and the denitrification. The present invention has the advantages of wide adaptive range of water quality, convenient operational management, good treatment effect, no need of external compressed air, etc. The present invention is especially suitable for small-scale sewage treatment plants.
Description
Technical field
The present invention relates to a kind of jet-flow aeration biological filtering tank, is a kind of waste disposal plant that can be used for sanitary sewage and organic industrial sewage processing, belongs to the environmental protection water treatment field.
Background technology
Traditional BAF (BAF) is the sewage treatment process that rises at the late 1980s and the beginning of the nineties, be used for advanced treatment of wastewater at first, after develop into and be directly used in second-stage treatment, it uses the particulate filter of rough porous, the filter material surface growth has microbial film, provides aeration at the bottom of the pond, during the effluent stream filter bed, pollutent at first is filtered and adsorbs, and then is decomposed by the microbiological oxidation of filter material surface.Its maximum characteristics are to integrate bio-oxidation and hold back suspended substance, have saved the post precipitation pond, have that volumetric loading is big, hydraulic detention time short, build less investment, effluent quality advantages of higher.But existing BAF need provide source of the gas by gas blower or air compressor, satisfies biological growth and prevents that filtrate from stopping up.And if want that the purpose that reaches denitrogenation need be provided with a plurality of reactors such as oxidation of coal pond, nitrification tank, denitrification pond, and between reactor, increase the sewage backflow device, perhaps adopt the zeolite filler that has except that the ammonia function, capital cost is higher, the maintenance management complexity.Moreover,, cause the suspended substance in the water outlet higher because the souring of gas is carried the microbial film that comes off on a part of filtrate usually in treating water because aeration head is positioned at the filtrate below.
Jet-flow aeration is as the 3rd class aeration method after blast aeration and mechanical aeration, utilize effusive turbulent fluctuation campaign and shearing action, cutting gas, produce microbubble, obtain high oxygen transfer rate, have simple structure, reliable, invest lower advantage, in sewage disposal, should have bigger technology and economic potential.But have not yet to see about the research that jet-flow aeration is combined with BAF and the report of device.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of jet-flow aeration biological filtering tank is provided, solve the oxygen supply problem of BAF by incorporate scheme, and circulate by waterpower and to control filtrate and stop up, be implemented in same inside reactor simultaneously and have aerobic zone and oxygen-starved area simultaneously, finish the nitrification and denitrification effect in a reactor, it is more to solve the small sewage treatment plant structures, the maintenance management complicated problems.
For realizing such purpose, the jet-flow aeration biological filtering tank of the present invention's design mainly is made up of bio-oxidation filtering basin, recoil water pump, jet aerator, water circulating pump and connecting tube, sludge hopper is installed in the bottom of bio-oxidation filtering basin, the bottom is installed supporting plate and is supported supporting layer, and supporting layer top is filter material layer.Water-in is positioned at the filter material layer bottom, and water outlet is positioned at filter material layer top, and washback drainpipe is installed at the place, free-water level locus above filter material layer.In the settling region between sludge hopper and the supporting plate, body both sides, pond, filter tank are communicated with recoil water pump and water circulating pump respectively, water circulating pump is connected with jet aerator, the jet aerator outlet was connected with the free-water level space of filter material layer top in the bio-oxidation filtering basin by a top communicating pipe, and jet aerator is introduced extraneous air by blast main.
Bio-oxidation filtering basin bio-oxidation filtering basin among the present invention mainly come oxygen supply and waterpower circulation by water circulating pump and jet aerator, for steel or concrete structure, can adopt square or circular structure formation.The filtering basin bottom is a sludge hopper, it more than the sludge hopper settling region about high 0.5m～1m, in order to the mud that comes off on the collection of biological film, water circulating pump water inlet pipe and recoil pumping line are installed on bio-oxidation filtering basin sidewall above the settling region, and supporting plate is installed in the pipeline top, mainly act as support supporting layer and filtrate, supporting plate can adopt concrete structure or steel design, evenly perforate on supporting plate, the aperture is 10mm～30mm, pitch of holes is 20mm～50mm.Stack 10cm～30cm supporting layer filtrate on supporting plate, the supporting layer filtrate is the haydite material, and particle diameter is in 15mm～40mm scope.It on the supporting layer filter material layer, the filter material layer height is 1.5m～3.0m, particle diameter of filter medium is in 3mm～7mm scope, filter material layer also can be made of two kinds of filtrates, it is the filtrate of 7mm～10mm that particle diameter is stacked in the bottom, it is the filtrate of 4mm～6mm that particle diameter is stacked on top, and the dividing point of two kinds of filtrates is the boundary with the water-in.Free-water level spatial altitude above the bio-oxidation filter material layer is 0.5m～1.0m, installs the top communicating pipe that links to each other with jet aerator at the free-water level place, and washback drainpipe is installed at 0.5m place, distance top.The position of water-in is positioned at the bottom of filter material layer, and about 1/3～1/4 place of bio-oxidation filtering basin height, the position of water outlet is positioned at the top of filter material layer, about 1/2～2/3 place of bio-oxidation filtering basin height.Water circulating pump is from bio-oxidation filtering basin suctions, and current direction is enterprising goes into the jet aerator, and the variation by flow rate of water flow in jet aerator forms negative pressure, and air enters jet aerator by blast main, with the recirculated water thorough mixing.The air-water mixture that leaves jet aerator enters the bio-oxidation filtering basin by top communicating pipe.
In the bio-oxidation filtering basin, be the boundary with the water-in, basically form two zones, water-in top is aerobic zone, mainly finishing the nitrification of organic oxidation and ammonia nitrogen, form nitrate, is anoxic zones in the water-in bottom, mainly utilize the organism in the former water to be carbon source, realize the denitrification of nitrate, change nitrogen into and from water, overflow, finish the removal of total nitrogen.
The present invention realizes the synchronous removal total nitrogen and the organic sewage disposal of sewage by following process:
In course of normal operation, the ON cycle water pump, handle former water and enter the bio-oxidation filtering basin by water-in, mixed with the water that contains nitrate that bio-oxidation filtering basin internal upper part flows downward, at first enter the anoxic zones of water-in bottom, under the effect of the denitrifying bacteria of anoxic zones, with the organism in the former water is carbon source, realize denitrification, change the nitrate in the former water into nitrogen, and remove most suspended substance, leave in the treating water mixed solution of oxygen-starved area and contain the suspended substance that comes off from filtrate, enter the settling region by precipitating action, be deposited in the sludge hopper of bottom, filter tank, the recirculated water of having removed a part of suspended substance enters jet aerator by the effect of water circulating pump, with the air thorough mixing, be back to bio-oxidation filtering basin top after the oxygenation, under the effect of the heterotrophic bacterium of the degradation of organic substances on bio-oxidation filtering basin top and nitrifier, organism in the circulation fluid is degraded, nitrogenous substances mainly transforms into nitrate, part water is discharged by water outlet, and another part water then flows downward and intakes mutually mixedly, enters next circulation.
Behind bio-oxidation filtering basin operation certain hour (generally at 24-48 hour), when the biological growth amount is stopped up filtering layer with the suspended substance that dams in the filtering layer, should recoil to the bio-oxidation filtering basin, water recoil form is adopted in recoil, close water circulating pump, opening the recoil water pump, is the water source to handle back water, and filtrate is recoiled, the mixed solution that contains a large amount of suspended substances that recoils is got back to the leading portion pre-treatment and is implemented, after the recoil, close the recoil water pump, enter the next round works better cycle.
Determine this system's sludge discharging period according to concentration of suspension in the sewage and organic concentration, regularly send the mud that in bucket, is detained by the valve of opening the mud-removing bucket bottom.
The present invention has realized the graded of dissolved oxygen in the bio-oxidation filtering basin, forms aerobic zone and oxygen-starved area respectively in the upper and lower, has the function that realizes synchronous nitration and denitrification and removal carbonaceous organic material at same reactor.Because do not have the left and right sides disturbance of air-flow in the bio-oxidation filtering basin, the concentration of suspension in the water outlet is low, can guarantee that effluent quality is limpid, need not follow-up equipment for separating liquid from solid.The settling region of bio-oxidation filtering basin bottoms alleviated come off do not have of the obstruction of active biological sludge to filtrate, the recoil cycle is long, the saving working cost.
The present invention combines by jet-flow aeration and bio-oxidation filtration process, has realized small-sized integrated sewage solution, need not external source of the gas, and it is convenient to have a running management, and save and take up an area of, the initial cost saving, structures such as concentrate at advantage.The present invention is particularly useful for sewage work on a small scale to the water quality wide accommodation.
Description of drawings
Fig. 1 is the structural representation of jet-flow aeration biological filtering tank of the present invention.
Among Fig. 1,1 is washback drainpipe, and 2 is the bio-oxidation filtering basin, 3 is filter material layer, and 4 is water outlet, and 5 is water-in, 6 is supporting layer, and 7 is supporting plate, and 8 are the recoil water pump, 9 is sludge hopper, and 10 is top communicating pipe, and 11 is blast main, 12 is jet aerator, 13 is circulating pump discharge pipe, and 14 is water circulating pump, and 15 is the water circulating pump water inlet pipe.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is further described.
Jet-flow aeration biological filtering tank concrete structure of the present invention mainly is made up of bio-oxidation filtering basin 2, recoil water pump 8, jet aerator 12, water circulating pump 14 and connecting tube as shown in Figure 1.Sludge hopper 9 is installed in the bottom of bio-oxidation filtering basin 2, and the supporting plate 7 that even perforate is installed in the bottom of bio-oxidation filtering basin 2 supports supporting layer 6, and supporting layer 6 tops are filter material layer 3.The position of water-in 5 is positioned at the bottom of filter material layer 3, and about 1/3～1/4 place of bio-oxidation filtering basin 2 height, the position of water outlet 4 is positioned at the top of filter material layer 3, about 1/2～2/3 place of bio-oxidation filtering basin 2 height.The free-water level spatial altitude is 0.5m～1.0m above filter material layer 3, and washback drainpipe 1 is installed at 0.5m place, distance top.In the settling region between sludge hopper 9 and the supporting plate 7, pond, filter tank body one side is communicated with recoil water pump 8, opposite side links to each other with water circulating pump 14 by water circulating pump water inlet pipe 15, water circulating pump 14 is connected with jet aerator 12 by circulating pump discharge pipe 13, jet aerator 12 outlets are by being connected with the free-water level space of filter material layer 3 tops in the bio-oxidation filtering basin 2 top communicating pipe 10, and jet aerator 12 is introduced extraneous air by blast main 11.
During operation, former water enters bio-oxidation filtering basin 2 by water-in 5, ON cycle water pump 14, and quantity of circulating water is determined according to former water organic concentration and ammonia nitrogen concentration.Treating water in former water and the reactor is mixed, by the filtrate 3 oxygen-starved area parts of water-in hypomere, finishes the interception of part suspended substance at first downwards, and under the effect of the nitrate in reactor, is carbon source with the organism in the water inlet, realizes denitrification process.Pass through supporting layer 6 and supporting plate 7 through the treating water after the oxygen-starved area, heavier suspended substance directly enters the settling region, fall into sludge hopper 9, it is pressurized that all the other treating water enter water circulating pump 14 by water circulating pump water inlet pipe 15, and further enter jet aerator 12 through circulating pump discharge pipe 13, pass through change in flow, realize that pressure is lower than normal atmosphere, air enters jet aerator 12 by blast main 11, mix with the processing water, the air water mixed solution is by be back in the bio-oxidation filtering basin 2 top communicating pipe 10, under removal organism heterotrophic bacterium of in filter material layer 3 epimeres, adsorbing and the effect of nitrifier, finish the nitrated of organic oxidation in the water and ammonia nitrogen, water part after the processing is discharged by water outlet 4, a part continues downwards along bio-oxidation filtering basin pond body, and nitrate wherein participates in next round-robin denitrification process.
In the bio-oxidation filtration procedure, when biomass in the filter material layer 3 and the suspended substance that dams are very high, must filter filtrate to bio-oxidation and recoil, close water circulating pump 14 this moment, opens recoil water pump 8, moves 3～10 minutes, and the water yield is 8L/m according to intensity
2/ h～20L/m
2/ h calculates, and the aging microbial film that stops on the filtrate and dam impurity under the effect of recoil water develops from filtering layer, by washback drainpipe 1 discharging.After recoil, reenter normal operation filtration stage.
Sludge hopper 9 contains a lot of mud after after a while, opens the sludge hopper valve and carries out regular spoil disposal.
Through above step, the organism BOD in the sewage
5, suspended substance, total nitrogen is all effectively removed.
Embodiment:
Handle the sanitary sewage of Shanghai City Minhang District, the useful volume of device bio-oxidation filtering basin 2 is 40L, hydraulic detention time is 4 hours, the ability of disposing of sewage is 10L/hr, the flow of water circulating pump 14 is 45L/h, and jet aerator 12 adopts a kind of small test device, and aperture ratio is 1: 5, raw water quality is as follows: COD (chemical oxygen demand (COD)) 350mg/L, BOD
5Be 159mg/L, ammonia nitrogen 10mg/L, total nitrogen are 30mg/L, and total phosphorus is 3mg/L, and suspended substance is 25mg/L.After the jet-flow aeration biological filtering tank processing, water outlet COD30mg/L, BOD
5Be 5mg/L, ammonia nitrogen is 3.5mg/L, and total phosphorus is 1mg/L, and total nitrogen is 10mg/L, " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard is satisfied in water outlet, through can be used as municipal reuse water or also can be used for the farmland irrigating water after the sterilization.
Claims (7)
1, a kind of jet-flow aeration biological filtering tank, it is characterized in that jet-flow aeration and bio-oxidation filtration are combined, by bio-oxidation filtering basin (2), recoil water pump (8), jet aerator (12), water circulating pump (14) and connecting tube are formed, sludge hopper (9) is installed in the bottom of bio-oxidation filtering basin (2), the supporting plate (7) that even perforate is installed in the bottom of bio-oxidation filtering basin (2) supports supporting layer (6), supporting layer (6) top is filter material layer (3), water-in (5) is positioned at filter material layer (3) bottom, water outlet (4) is positioned at filter material layer (3) top, the free-water level space mounting washback drainpipe (1) of filter material layer (3) top, sludge hopper (9) is communicated with recoil water pump (8) and water circulating pump (14) respectively with settling region between the supporting plate (7), water circulating pump (14) links to each other with jet aerator (12) by circulating pump discharge pipe (13), jet aerator (12) outlet linked to each other with the free-water level space of filter material layer (3) top in the bio-oxidation filtering basin (2) by top communicating pipe (10), and jet aerator (12) is introduced extraneous air by blast main (11).
2, according to the jet-flow aeration biological filtering tank of claim 1, it is characterized in that described water-in (5) is positioned at 1/3～1/4 place of bio-oxidation filtering basin (2) height, water outlet (4) is positioned at 1/2～2/3 place of bio-oxidation filtering basin (2) height.
3, according to the jet-flow aeration biological filtering tank of claim 1, it is characterized in that described supporting layer (6) highly is 10cm～30cm, the supporting layer filtrate is the haydite material, particle diameter is 15mm～40mm.
4, according to the jet-flow aeration biological filtering tank of claim 1, it is characterized in that it is 10mm～30mm that described supporting plate (7) is gone up the aperture of even perforate, pitch of holes is 20mm～50mm.
5, according to the jet-flow aeration biological filtering tank of claim 1, it is characterized in that described filter material layer (3) highly is 1.5m～3.0m, the filter material layer particle diameter of filter medium is 3mm～7mm.
6, according to the jet-flow aeration biological filtering tank of claim 1, it is characterized in that described filter material layer (3) is made of two kinds of filtrates, it is the filtrate of 7mm～10mm that particle diameter is stacked in the bottom, and it is the filtrate of 4mm～6mm that particle diameter is stacked on top, and the dividing point of two kinds of filtrates is the boundary with water-in (5).
7, according to the jet-flow aeration biological filtering tank of claim 1, it is characterized in that the free-water level spatial altitude of described filter material layer (3) top is 0.5m～1.0m, washback drainpipe (1) is installed in apart from 0.5m place, bio-oxidation filtering basin (2) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100250756A CN100336743C (en) | 2005-04-14 | 2005-04-14 | Jet-flow aeration biological filtering tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100250756A CN100336743C (en) | 2005-04-14 | 2005-04-14 | Jet-flow aeration biological filtering tank |
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| CN1693229A CN1693229A (en) | 2005-11-09 |
| CN100336743C true CN100336743C (en) | 2007-09-12 |
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| CNB2005100250756A Expired - Fee Related CN100336743C (en) | 2005-04-14 | 2005-04-14 | Jet-flow aeration biological filtering tank |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390078C (en) * | 2006-03-08 | 2008-05-28 | 安徽工业大学 | Gas lifting alternative circulation flow composite filter material filter pool |
| CN101062819B (en) * | 2006-04-26 | 2010-05-12 | 杨生强 | Sewage treatment device |
| CN104692595B (en) * | 2015-03-05 | 2017-08-11 | 华中科技大学 | A kind of sewage-treatment plant, system and method |
| CN105585105B (en) * | 2015-11-27 | 2018-06-22 | 欧盛腾水处理技术（杭州）有限公司 | Suspending type biological filter bed and its jetting type purging method |
| CN105439280A (en) * | 2015-12-31 | 2016-03-30 | 北京伊普国际水务有限公司 | Efficient biological aerated filter applicable to pretreatment of micro-polluted source water |
| CN110627330B (en) * | 2019-11-14 | 2021-02-05 | 德州学院 | A textile printing and dyeing effluent treatment plant for reuse of reclaimed water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU622763A1 (en) * | 1976-09-27 | 1978-09-05 | Ленинградское высшее военное инженерно-строительное училище им.Генерала армии А.Н.Комаровского | Device for biochemical purification of waste water |
| JPS6295197A (en) * | 1985-12-09 | 1987-05-01 | Katsumi Iida | Contact oxidation biological filter device |
| JPH04300697A (en) * | 1991-03-29 | 1992-10-23 | Shinko Pantec Co Ltd | Biological filtration and apparatus therefor |
| US5288400A (en) * | 1992-12-04 | 1994-02-22 | Theodore J. Wichman | Biological filtration system |
| CN2345536Y (en) * | 1998-07-22 | 1999-10-27 | 上海铁道大学 | Pure-oxygen-jet-flow-compound biological membrance sewage treatment device |
-
2005
- 2005-04-14 CN CNB2005100250756A patent/CN100336743C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU622763A1 (en) * | 1976-09-27 | 1978-09-05 | Ленинградское высшее военное инженерно-строительное училище им.Генерала армии А.Н.Комаровского | Device for biochemical purification of waste water |
| JPS6295197A (en) * | 1985-12-09 | 1987-05-01 | Katsumi Iida | Contact oxidation biological filter device |
| JPH04300697A (en) * | 1991-03-29 | 1992-10-23 | Shinko Pantec Co Ltd | Biological filtration and apparatus therefor |
| US5288400A (en) * | 1992-12-04 | 1994-02-22 | Theodore J. Wichman | Biological filtration system |
| CN2345536Y (en) * | 1998-07-22 | 1999-10-27 | 上海铁道大学 | Pure-oxygen-jet-flow-compound biological membrance sewage treatment device |
Non-Patent Citations (1)
| Title |
|---|
| 双F法在淀粉糖生产废水处理中的应用 张征等，工业水处理，第24卷第4期 2004 * |
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