CN100586879C - Biological filter dephosphorizing technique employing alternative aeration - Google Patents
Biological filter dephosphorizing technique employing alternative aeration Download PDFInfo
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- CN100586879C CN100586879C CN200710191640A CN200710191640A CN100586879C CN 100586879 C CN100586879 C CN 100586879C CN 200710191640 A CN200710191640 A CN 200710191640A CN 200710191640 A CN200710191640 A CN 200710191640A CN 100586879 C CN100586879 C CN 100586879C
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Abstract
The invention discloses a biological phosphorus removal process, which adopts an alternating aeration biological filter. The biological filter adopted by the process technology consists of two intercommunicated biological filters with the same structure. Domestic sewage continuously flows through the two biological filters respectively. At the same time, aeration oxygen is intermittently suppliedto the two biological filters, which leads to a result that the two biological filters are repeatedly at anaerobic or aerobic environment. And microorganisms contained in the domestic sewage are naturally attached to biological filtering materials in the filters and phosphorus-accumulating bacteria which can survive at both the anaerobic and the aerobic environment are domesticated. The phosphorus-accumulating bacteria uptake orthophosphate in the sewage discharged under the anaerobic environmental status and re-synthesize the orthophosphate in the form of polyphosphate. Reduced phosphorus isabsorbed in the bodies of phosphorus-accumulating bacteria. And the superfluous and the aged phosphorus-accumulating bacteria which absorb excessive phosphorus after the aerobic status are dischargedout of a system. Therefore, the phosphorus in the sewage is removed at last.
Description
Technical field
The present invention relates to the biomembrance process technical field of sewage, particularly a kind of peculiar microorganism that utilizes is removed phosphorus (P0 in the sanitary sewage in the Continuous Flow biological filter of adopting alternative expression aeration operation scheme
4 3-) processing method.
Background technology
Phosphorus (PO in the sanitary sewage
4 3-) be the controlling index in country's " urban wastewater treatment firm pollutant emission standard ", though phosphorus is the main trophicity element of plant and microorganism, but entering water body, excessive phosphorous nutritive substance can cause body eutrophication, more outstanding to such harm of sealing water body especially, can cause as pollution incidents such as Taihu Lake blue-green algae incidents.
The dephosphorization treatment technology of sewage mainly contains chemical dephosphorization and biological phosphate-eliminating two big classes, and the chemical dephosphorization effect stability is reliable, but need to consume a large amount of chemical agents and can produce a large amount of chemical sludges, makes sewage and sludge treatment expense height, and is uneconomical; Biological phosphate-eliminating technology can avoid using chemical agent owing to utilize the physiological property of peculiar microorganism to remove phosphorus in the sewage, and processing costs is low.
The key of biological phosphate-eliminating technology must at first be turned out in the biological treatment system that the reactor of different operation conditions is formed has peculiar microorganism-polyP bacteria of releasing phosphorus or inhaling the phosphorus function, and polyP bacteria is the heterotrophic organism that the microorganism in the biological treatment system is tamed out under anaerobic and aerobic alternate run envrionment conditions repeatedly, when its dephosphorization mechanism is that polyP bacteria is in the anaerobic environment state, it will be before being stored in intravital polyphosphoric acid hydrolysis, discharge to sewage (liquid phase) with ortho-phosphoric acid form (solid phase) in body, the organism in the sewage is ingested simultaneously, and cell is interior to be stored in the cell with glycogen or poly-β hydroxybutyric acid substrate forms such as (PHB); After the anaerobic environment state continues for some time, then make polyP bacteria be in the aerobic environment state, be stored in oxidized decomposition of intracellular these PHB substrates and generate energy, polyP bacteria utilizes these energy to be used for the synthetic of the absorption of phosphorus and new polyP bacteria, and utilize its energy excessively, exceed its physiology growth demand and absorb the ortho-phosphoric acid that brings in that discharge the anaerobic environment state under and the sewage inflow treatment system, form with polyphosphoric acid is carried out resynthesis, the concentration of phosphorus reduces to below the concentration of water phosphorus in the mixed solution as a result, the phosphorus that reduces is absorbed in the polyP bacteria body, and behind good oxygen condition, manage unnecessary, outside the polyP bacteria discharge system of the excessive absorption phosphorus of aged, thereby the phosphorus in the sewage is finally removed.
In the sewage treatment process of prior biological filter tank, biological filter or operation (anaerobic filter) under the anaerobic environment condition, operation (aerobic filter tank) under the aerobic environment condition, and not with the sewage treatment process of biological filter alternate run under anaerobism, aerobic operating mode, so can not tame out polyP bacteria in the conventional at present independent aerobic or anaerobic biofilter, obviously just do not possess biological phosphorus removal functional, so develop the key that a kind of biological filter that can tame out polyP bacteria is such sewage treatment process biological phosphate-eliminating technology yet.
Summary of the invention
The purpose of this invention is to provide and a kind of alternative expression aeration operation is carried out in the biological filter, tame out by alternately anaerobism, aerobic running environment and be attached to the Technology that the polyP bacteria microorganism on the filtrate in the biological filter removes phosphorus in the sanitary sewage.
The technical scheme of the biological filter biological phosphate-eliminating technology of alternative expression aeration of the present invention is:
1, the filter tank that this Technology adopted is communicated with by mutual intersection, two biological filters of identical in structure combine, before the formal periodic duty of system's input, allow sanitary sewage respectively Continuous Flow cross two biological filters, the aeration oxygen supply all hockets in while two biological filters, make two biological filters all be in aerobic/anaerobic environment repeatedly, make the microorganism that contains in the sanitary sewage be attached on the biofilter material in the filter tank naturally and tame out the polyP bacteria that under the anaerobic and aerobic environment, all can survive, system enters formal cycling service then, and each cycle of operation is finished by operating mode one and 2 two kinds of operation condition alternate combinations of operating mode.
2, operating mode for the moment, biological filter 1 is in the not anaerobic state of aeration, dissolved oxygen concentration is controlled at below the 0.5mg/L in the pond, biological filter 2 is in the good oxygen condition of aeration, dissolved oxygen concentration is controlled at more than the 3mg/L in the pond.
3, operating mode for the moment, sewage is at first entered the buffer zone of 1 bottom, biological filter by the treatment sewage water inlet pipe, and it is the cross section, pond that sewage is uniformly distributed in biological filter 1 is also upwards mobile through support filter plate water and air distributing system, flow through the spheroidal particle biofilter material layer of the density of support filter plate water and air distributing system top filling greater than water, when effluent stream is crossed spheroidal particle biofilter material layer, polyP bacteria of apposition growth is under the extremely low anaerobic state of dissolved oxygen on it, can discharge to mixed solution (liquid phase) before being stored in intravital phosphorus (solid phase) in body, simultaneously a large amount of organism that absorb in the sewage store in vivo, and this moment, organic concentration from the water that discharge biological filter 1 significantly reduced and the concentration of phosphorus increases to some extent; The buffer zone that is entered 2 bottoms, biological filter by the series connection water inlet pipe of biological filter 2 is flowed out in the water outlet of biological filter 1 from rising pipe, and through coming water to be uniformly distributed in the cross section, pond of biological filter 2 and upwards flow of support filter plate water and air distributing system with biological filter 1, flow through the spheroidal particle biofilter material layer of the density of support filter plate water and air distributing system top filling, make the phosphorus index in the water outlet reach the qualified discharge standard by the excessive suction phosphorus of the polyP bacteria effect that is attached on the spheroidal particle biofilter material layer greater than water.
4, after about 8～12 hours back flushing is carried out in biological filter 2 in operating mode one operation, backwashing water and back flushing air wash away spheroidal particle biofilter material layer, to adhere to polyP bacteria unnecessary on it, the excessive absorption phosphorus of aged and discharge system with backwashing water, thereby the phosphorus in the sewage is finally removed, reach the purpose of removing phosphorus from sewage, system enters operating mode two operations subsequently.
5, during operating mode two, biological filter 2 is in the not anaerobic state of aeration, and dissolved oxygen concentration is controlled at below the 0.5mg/L in the pond, and biological filter 1 is in the good oxygen condition of aeration, and dissolved oxygen concentration is controlled at more than the 3mg/L in the pond.
6, during operating mode two, sewage is at first entered the buffer zone of 2 bottoms, biological filter by the treatment sewage water inlet pipe, and it is the cross section, pond that sewage is uniformly distributed in biological filter 2 is also upwards mobile through support filter plate water and air distributing system, flow through the spheroidal particle biofilter material layer that support filter plate water and air distributing system top is loaded, the high reactivity polyP bacteria that carries over after operating mode one back flushing is under anaerobic state, can discharge to mixed solution (liquid phase) before being stored in intravital phosphorus (solid phase) in body, simultaneously a large amount of organism that absorb in the sewage store in vivo, and this moment, organic concentration from the water that discharge biological filter 2 significantly reduced and the concentration of phosphorus increases to some extent; The buffer zone that is entered 1 bottom, biological filter by the series connection water inlet pipe of biological filter 1 is flowed out in the water outlet of biological filter 2 from rising pipe, and through coming water to be uniformly distributed in the cross section, pond of biological filter 1 and upwards flow of support filter plate water and air distributing system with biological filter 2, flow through the spheroidal particle biofilter material layer that support filter plate water and air distributing system top is loaded, under the effect that is attached to the excessive suction phosphorus of polyP bacteria after operating mode one is released phosphorus on the spheroidal particle biofilter material layer, make the phosphorus index in the water outlet reach the qualified discharge standard.
7, after about 8～12 hours back flushing is carried out in biological filter 1 in operating mode two operations, backwashing water and back flushing air wash away spheroidal particle biofilter material layer, the polyP bacteria unnecessary, the excessive absorption phosphorus of aged that will adhere on it is discharged system with backwashing water from the back flushing water shoot, thereby the phosphorus in the sewage is finally removed, reach the purpose of removing phosphorus from sewage, system enters the second period operation subsequently.
Description of drawings
Fig. 1 is the process flow diagram that the present invention adopts the biological filter biological phosphate-eliminating technology of alternative expression aeration.
Embodiment
Be described further below in conjunction with the biological filter biological phosphate-eliminating technology of accompanying drawing alternative expression aeration of the present invention
1, the filter tank that this Technology adopted is communicated with by mutual intersection, two biological filters of identical in structure combine, before the formal periodic duty of system's input, allow sanitary sewage respectively Continuous Flow cross two biological filters, simultaneously two biological filters all are interrupted and are carried out the aeration oxygen supply, make two biological filters all be in aerobic/anaerobic environment repeatedly, make the microorganism that contains in the sanitary sewage be attached on the biofilter material in the filter tank naturally and tame out the polyP bacteria that under the anaerobic and aerobic environment, all can survive, system enters formal cycling service then, and each cycle of operation is finished by two kinds of operation condition alternate combinations.
2, operating mode for the moment, biological filter 1 is in the not anaerobic state of aeration, dissolved oxygen concentration is controlled at below the 0.5mg/L in the pond, biological filter 2 is in the good oxygen condition of aeration, dissolved oxygen concentration is controlled at more than the 3mg/L in the pond; Close valve 33 on the treatment sewage water inlet pipe 21 of biological filter 2, the valve 34 on the back flushing water inlet pipe 23, the valve 35 on the back flushing inlet pipe 22, the valve 37 on the back flushing water shoot 17, close the valve 27 on valve 29 on 1 aeration tube 8 of biological filter, the valve 25 on the back flushing water inlet pipe 10, the valve 26 on the back flushing inlet pipe 9, the valve 30 on the back flushing water shoot 11, the valve 31 on the rising pipe 14, the series connection water inlet pipe 15; Open the valve 28 on the 1 treatment sewage water inlet pipe 7 of biological filter, the valve 32 on the 2 series connection water inlet pipes 13 of biological filter, the valve 36 on the aeration tube 24, the valve 38 on the rising pipe 16.
3, operating mode for the moment, sewage is at first entered the buffer zone 3 of 1 bottom, biological filter by treatment sewage water inlet pipe 7, and it is the cross section, pond that sewage is uniformly distributed in biological filter 1 is also upwards mobile through support filter plate water and air distributing system 4, flow through the spheroidal particle biofilter material layer 5 of the density of support filter plate water and air distributing system 4 tops filling greater than water, this spheroidal particle biofilter material has huge specific surface area, crude and the porous in surface, top domestication naturally is attached with highdensity polyP bacteria, when effluent stream is crossed spheroidal particle biofilter material layer 5, polyP bacteria of apposition growth is under the extremely low anaerobic state of dissolved oxygen on it, can discharge to mixed solution (liquid phase) before being stored in intravital phosphorus (solid phase) in body, simultaneously a large amount of organism that absorb in the sewage store in vivo, and this moment, organic concentration from the water that discharge biological filter 1 significantly reduced and the concentration of phosphorus increases to some extent; The water outlet of biological filter 1 is flowed out the buffer zone 18 that is entered 2 bottoms, biological filter by the series connection water inlet pipe 13 of biological filter 2 from rising pipe 12, and through coming water to be uniformly distributed in the cross section, pond of biological filter 2 and upwards flow of support filter plate water and air distributing system 19 with biological filter 1, flow through the spheroidal particle biofilter material layer 20 of the density of support filter plate water and air distributing system 19 tops filling greater than water, this spheroidal particle biofilter material has huge specific surface area, crude and the porous in surface, top domestication naturally is attached with highdensity polyP bacteria, when effluent stream is crossed spheroidal particle biofilter material layer 20, carrying out under the aerobic condition of oxygen supply fast in this operating mode at the polyP bacteria under the last one-period anaerobic condition on it, original absorption of oxygenolysis is stored in intravital organism and generate energy, and from sewage excessively, exceed its physiology growth demand and absorb that it discharges under last one-period anaerobic environment state with sewage in the ortho-phosphoric acid that brings, form with polyphosphoric acid is carried out resynthesis, the concentration of phosphorus reduces to below the concentration of water phosphorus in the mixed solution as a result, the phosphorus that reduces is absorbed in the polyP bacteria body, simultaneously other aerobic-anaerobic microbe of apposition growth further absorbs the organism in the sewage and they is decomposed into carbonic acid gas and water on the biofilter material layer 20 under aerobic condition, and make water outlet limpid by the filteration of spheroidal particle biofilter material layer 20, make organism in the final outflow water, phosphorus, indexs such as SS reach the qualified discharge standard.
4, after about 8～12 hours back flushing is carried out in biological filter 2 in operating mode one operation, open the valve 37 on the 2 back flushing water shoots 17 of biological filter, valve 34 on the back flushing water inlet pipe 23, valve 35 on the back flushing inlet pipe 22, backwashing water and back flushing air are respectively by back flushing water inlet pipe 23, back flushing inlet pipe 22 enters the buffer zone 18 of bottom, gas after support filter plate water and air distributing system 19 is mixed, water washes away spheroidal particle biofilter material layer 20, with unnecessary, the polyP bacteria of the excessive absorption phosphorus of aged with backwashing water from back flushing water shoot 17 discharge systems, thereby phosphorus in the sewage is finally discharged outside the system to be removed, reach the purpose of removing phosphorus from sewage, system enters operating mode two operations subsequently.
5, during operating mode two, biological filter 2 is in the not anaerobic state of aeration, and dissolved oxygen concentration is controlled at below the 0.5mg/L in the pond, and biological filter 1 is in the good oxygen condition of aeration, and dissolved oxygen concentration is controlled at more than the 3mg/L in the pond; Close valve 28 on the treatment sewage water inlet pipe 7 of biological filter 1, the valve 25 on the back flushing water inlet pipe 10, the valve 26 on the back flushing inlet pipe 9, the valve 30 on the back flushing water shoot 11, close the valve 32 on valve 36 on 2 aeration tubes 24 of biological filter, the valve 34 on the back flushing water inlet pipe 23, the valve 35 on the back flushing inlet pipe 22, the valve 37 on the back flushing water shoot 17, the valve 38 on the rising pipe 16, the series connection water inlet pipe 13; Open the valve 33 on the 2 treatment sewage water inlet pipes 21 of biological filter, the valve 27 on the 1 series connection water inlet pipe 15 of biological filter, the valve 29 on the aeration tube 8, the valve 31 on the rising pipe 14.
6, during operating mode two, sewage is at first entered the buffer zone 18 of 2 bottoms, biological filter by treatment sewage water inlet pipe 21, and it is the cross section, pond that sewage is uniformly distributed in biological filter 2 is also upwards mobile through support filter plate water and air distributing system 19, flow through the spheroidal particle biofilter material layer 20 that support filter plate water and air distributing system 19 tops are loaded, on this spheroidal particle biofilter material at high reactivity polyP bacteria that operating mode one is not backwashed under the extremely low anaerobic state of dissolved oxygen, can be stored in intravital phosphorus (solid phase) in body to absorption under industrial and mineral one aerobic condition discharges to mixed solution (liquid phase), simultaneously a large amount of organism that absorb in the sewage store in vivo, and this moment, organic concentration from the water that discharge biological filter 2 significantly reduced and the concentration of phosphorus increases to some extent; The water outlet of biological filter 2 is flowed out the buffer zone 3 that is entered 1 bottom, biological filter by the series connection water inlet pipe 15 of biological filter 1 from rising pipe 39, and through coming water to be uniformly distributed in the cross section, pond of biological filter 1 and upwards flow of support filter plate water and air distributing system 4 with biological filter 2, flow through the spheroidal particle biofilter material layer 5 that support filter plate water and air distributing system 4 tops are loaded, carrying out under the aerobic condition of oxygen supply fast oxygenolysis at the polyP bacteria under operating mode one anaerobic condition in operating mode two ponds on it originally absorbed for the moment in operating mode and was stored in intravital organism and generate energy, and the phosphorus that excessively absorbs from sewage in the sewage stores in vivo, simultaneously other aerobic-anaerobic microbe of apposition growth further absorbs the organism in the sewage and they is decomposed into carbonic acid gas and water on the biofilter material layer 5 under aerobic condition, and make water outlet limpid by the filteration of spheroidal particle biofilter material layer 5, make organism in the final outflow water, phosphorus, indexs such as SS reach the qualified discharge standard.
7, after about 8～12 hours back flushing is carried out in biological filter 1 in operating mode two operations, open the valve 30 on the 1 back flushing water shoot 11 of biological filter, valve 25 on the back flushing water inlet pipe 10, valve 26 on the back flushing inlet pipe 9, backwashing water and back flushing air are respectively by back flushing water inlet pipe 10, back flushing inlet pipe 9 enters the buffer zone 3 of bottom, gas after support filter plate water and air distributing system 4 is mixed, water washes away spheroidal particle biofilter material layer 5, to adhere to unnecessary on it, the polyP bacteria of the excessive absorption phosphorus of aged with backwashing water from back flushing water shoot 11 discharge systems, thereby phosphorus in the sewage is finally discharged outside the system to be removed, reach the purpose of removing phosphorus from sewage, system enters the second period operation subsequently.
Attempt one according to the present invention technology implement the phosphorus in the sanitary sewage is handled example to qualified discharge, be illustrated:
Community life sewage, the discharge of sewage is 120 ton per days, enters the preceding pollutent index of this art breading to be: COD=300mg/L, BOD=150mg/L, SS=250mg/L, TP=8mg/L.This sewage at first enters two mutual intersection connections, the identical in structure biological filter, every filter tank diameter 1m, pond body height overall 6.5m, the height 1000mm at the bottom of the pond of support filter plate water and air distributing system, be that the buffer zone height is 1000mm, special-purpose water and air distributing filter is installed in the filter plate water and air distributing system, the high diameter ∮ 3～5mm spheroidal particle biofilter material of its top filling 4000mm, spheroidal particle biofilter material layer top exhalant region height is 1000mm, the water surface is to pond heights of roofs 0.5m, the highly effective air diffuser system all is installed in the spheroidal particle biofilter material layer in two filter tanks bottom can oxygen supply in water, but when this pond need not oxygen supply during as anaerobic pond, before the formal periodic duty of system's input, allow sanitary sewage respectively Continuous Flow cross two biological filters, simultaneously two biological filters all are interrupted and are carried out the aeration oxygen supply, make two biological filters all be in aerobic/anaerobic environment repeatedly, make the microorganism that contains in the sanitary sewage be attached on the biofilter material in the filter tank naturally and tame out polyP bacteria, system enters formal cycling service then, each cycle of operation is finished by two kinds of operation condition alternate combinations, make the pollutent index of final outflow water be: COD≤50mg/L, BOD≤10mg/L, SS≤10mg/L, TP≤1.0mg/L reaches the one-level B emission request of " urban wastewater treatment firm pollutant emission standard ".
Claims (4)
1, a kind of biological filter biological phosphate-eliminating technology that adopts the alternative expression aeration, its process technology scheme is:
1), the filter tank that this Technology adopted is communicated with by mutual intersection, two biological filters of identical in structure combine, before the formal periodic duty of system's input, allow sanitary sewage respectively Continuous Flow cross two biological filters, simultaneously two biological filters all are interrupted and are carried out the aeration oxygen supply, make two biological filters all be in the aerobic/anaerobic environment repeatedly, make the microorganism that contains in the sanitary sewage be attached on the biofilter material in the filter tank naturally and tame out in anaerobism, the polyP bacteria that aerobic environment all can be survived down, system enters formal cycling service then, and each cycle of operation is finished by operating mode one and 2 two kinds of operation condition alternate combinations of operating mode;
2), operating mode for the moment, biological filter 1 is in the not anaerobic state of aeration, dissolved oxygen concentration is controlled at below the 0.5mg/L in the pond, biological filter 2 is in the good oxygen condition of aeration, dissolved oxygen concentration is controlled at more than the 3mg/L in the pond;
3), operating mode for the moment, sewage is at first entered the buffer zone of 1 bottom, biological filter by the treatment sewage water inlet pipe, and it is the cross section, pond that sewage is uniformly distributed in biological filter 1 is also upwards mobile through support filter plate water and air distributing system, flow through the spheroidal particle biofilter material layer of the density of support filter plate water and air distributing system top filling greater than water, when effluent stream is crossed spheroidal particle biofilter material layer, polyP bacteria of apposition growth is under the extremely low anaerobic state of dissolved oxygen on it, can in body, discharge before being stored in intravital phosphorus to mixed solution, simultaneously a large amount of organism that absorb in the sewage store in vivo, and this moment, organic concentration from the water that discharge biological filter 1 significantly reduced and the concentration of phosphorus increases to some extent; The buffer zone that is entered 2 bottoms, biological filter by the series connection water inlet pipe of biological filter 2 is flowed out in the water outlet of biological filter 1 from rising pipe, and through coming water to be uniformly distributed in the cross section, pond of biological filter 2 and upwards flow of support filter plate water and air distributing system with biological filter 1, flow through the spheroidal particle biofilter material layer of the density of support filter plate water and air distributing system top filling, make the phosphorus index in the water outlet reach " urban wastewater treatment firm pollutant emission standard " one-level B standard by the excessive suction phosphorus of the polyP bacteria effect that is attached on the spheroidal particle biofilter material layer greater than water;
4), after 8～12 hours back flushing is carried out in biological filter 2 in operating mode one operation, backwashing water and back flushing air wash away spheroidal particle biofilter material layer, polyP bacteria unnecessary, the excessive absorption phosphorus of aged is discharged system with backwashing water, thereby the phosphorus in the sewage is finally removed, reach the purpose of removing phosphorus from sewage, system enters operating mode two operations subsequently;
5), during operating mode two, biological filter 2 is in the not anaerobic state of aeration, dissolved oxygen concentration is controlled at below the 0.5mg/L in the pond, biological filter 1 is in the good oxygen condition of aeration, dissolved oxygen concentration is controlled at more than the 3mg/L in the pond;
6), during operating mode two, sewage is at first entered the buffer zone of 2 bottoms, biological filter by the treatment sewage water inlet pipe, and it is the cross section, pond that sewage is uniformly distributed in biological filter 2 is also upwards mobile through support filter plate water and air distributing system, flow through the spheroidal particle biofilter material layer that support filter plate water and air distributing system top is loaded, on this spheroidal particle biofilter material layer at high reactivity polyP bacteria that operating mode one is not backwashed under the extremely low anaerobic state of dissolved oxygen, can be stored in intravital phosphorus to absorption under operating mode one aerobic condition discharges to mixed solution in body, simultaneously a large amount of organism that absorb in the sewage store in vivo, and this moment, organic concentration from the water that discharge biological filter 2 significantly reduced and the concentration of phosphorus increases to some extent; The buffer zone that is entered 1 bottom, biological filter by the series connection water inlet pipe of biological filter 1 is flowed out in the water outlet of biological filter 2 from rising pipe, and through coming water to be uniformly distributed in the cross section, pond of biological filter 1 and upwards flow of support filter plate water and air distributing system with biological filter 2, flow through the spheroidal particle biofilter material layer that support filter plate water and air distributing system top is loaded, carrying out under the aerobic condition of oxygen supply fast oxygenolysis at the polyP bacteria under operating mode one anaerobic condition in operating mode two ponds on the spheroidal particle biofilter material layer originally absorbed for the moment in operating mode and was stored in intravital organism and generate energy, and the phosphorus that excessively absorbs from sewage in the sewage stores in vivo, simultaneously other aerobic-anaerobic microbe of apposition growth further absorbs the organism in the sewage and they is decomposed into carbonic acid gas and water on the spheroidal particle biofilter material layer under aerobic condition, and make water outlet limpid by the filteration of spheroidal particle biofilter material layer, make organism in the final outflow water, phosphorus, the SS index reaches " urban wastewater treatment firm pollutant emission standard " one-level B standard;
7), after 8～12 hours back flushing is carried out in biological filter 1 in operating mode two operations, backwashing water and back flushing air wash away spheroidal particle biofilter material layer, polyP bacteria unnecessary, the excessive absorption phosphorus of aged is discharged system with backwashing water from the back flushing water shoot, thereby the phosphorus in the sewage is finally removed, reach the purpose of removing phosphorus from sewage, system enters the second period operation subsequently.
2, the biological filter biological phosphate-eliminating technology of employing alternative expression aeration according to claim 1, it is characterized in that need not adding special processing microorganism, and only need before the formal periodic duty of system's input, allow sanitary sewage respectively Continuous Flow cross two biological filters, simultaneously two biological filters all are interrupted and are carried out the aeration oxygen supply, make two biological filters all be in the aerobic/anaerobic environment repeatedly, utilize the microorganism that contains in the sanitary sewage to be attached on the biofilter material in the filter tank naturally and tame out the polyP bacteria that under anaerobism, aerobic environment, all can survive.
3, the biological filter biological phosphate-eliminating technology of employing alternative expression aeration according to claim 1, it is characterized in that in operating mode not aeration oxygen supply and be in anaerobic state in the biological filter 1 for the moment, and aeration oxygen supply and be in oxygen condition in the biological filter 2, treatment sewage earlier 1 enters and flows into biological filter 2 again from the biological filter, the polyP bacteria that adheres on the spheroidal particle biofilter material layer in the biological filter 1 produces the polyP bacteria of releasing the phosphorus effect and adhering on the spheroidal particle biofilter material layer in the biological filter 2 and produces the effect of excessive suction phosphorus, and by in good time back flushing is carried out with unnecessary in biological filter 2, outside the polyP bacteria system of recoiling out behind the excessive suction phosphorus of aged, thereby play dephosphorization function, the assimilation of other anoxic microorganism that adheres on the spheroidal particle biofilter material layer in the biological filter 1 simultaneously also will be removed a spot of organic pollution materials in the sewage, and other aerobic microbiological that adheres on the spheroidal particle biofilter material layer in the biological filter 2 will be removed Organic pollutants materials a large amount of in the sewage, the spherical light multiporous biological filtrate of loading in two biological filters can also be held back the suspended matter in the sewage, make the suspended matter concentration in the water outlet extremely low, make water outlet limpid, the spherical light multiporous biological filtrate in two biological filters is fixedly filter bed.
4, the biological filter biological phosphate-eliminating technology of employing alternative expression aeration according to claim 1, it is characterized in that when operating mode two in the biological filter 2 not aeration oxygen supply and be in anaerobic state, and aeration oxygen supply and be in oxygen condition in the biological filter 1, treatment sewage earlier 2 enters and flows into biological filter 1 again from the biological filter, the polyP bacteria that adheres on the spheroidal particle biofilter material layer in the biological filter 2 produces the polyP bacteria of releasing the phosphorus effect and adhering on the spheroidal particle biofilter material layer in the biological filter 1 and produces the effect of excessive suction phosphorus, and by in good time back flushing is carried out with unnecessary in biological filter 1, outside the polyP bacteria system of recoiling out behind the excessive suction phosphorus of aged, thereby play dephosphorization function, the assimilation of other anoxic microorganism that adheres on the spheroidal particle biofilter material layer in the biological filter 2 simultaneously also will be removed a spot of organic pollution materials in the sewage, and other aerobic microbiological that adheres on the spheroidal particle biofilter material layer in the biological filter 1 will be removed Organic pollutants materials a large amount of in the sewage, the spherical light multiporous biological filtrate of loading in two biological filters can also be held back the suspended matter in the sewage, make the suspended matter concentration in the water outlet extremely low, make water outlet limpid, the spherical light multiporous biological filtrate in two biological filters is fixedly filter bed.
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| CN101962220B (en) * | 2010-07-30 | 2012-01-04 | 南京林业大学 | Biological denitrification method of sewage with low carbon-nitrogen ratio and special device thereof |
| CN106219755A (en) * | 2016-10-08 | 2016-12-14 | 济南大学 | A kind of device utilizing three grades of biofilter synchronous denitrification dephosphorizings and processing method thereof |
| CN107129029B (en) * | 2017-06-26 | 2020-11-10 | 河海大学 | Method for maintaining microbial activity of carbon layer under intermittent operation condition of biological activated carbon pool |
| CN111646573B (en) * | 2020-06-23 | 2021-11-23 | 苏州科技大学 | Phosphorus removal and recovery method by using organic carbon source in municipal sewage |
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