CN202226718U - NISS nitrogen and phosphorus removal device adopting no inner circumfluence two-sectional water inflow - Google Patents
NISS nitrogen and phosphorus removal device adopting no inner circumfluence two-sectional water inflow Download PDFInfo
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- CN202226718U CN202226718U CN2011203106936U CN201120310693U CN202226718U CN 202226718 U CN202226718 U CN 202226718U CN 2011203106936 U CN2011203106936 U CN 2011203106936U CN 201120310693 U CN201120310693 U CN 201120310693U CN 202226718 U CN202226718 U CN 202226718U
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Abstract
An NISS (no inner circumfluence with stepfeed system) nitrogen and phosphorus removal device adopting no inner circumfluence two-sectional water inflow, and belongs to the technical field of activated sludge biochemical sewage treatment, and mainly comprises a sewage proportional water inflow partition water tank, a first-section hypoxia reactor, an anaerobic reactor, a first-section aerobic reactor, a second-section hypoxia reactor and a second-section aerobic reactor, wherein the first-section hypoxia reactor, the anaerobic reactor, the first-section aerobic reactor, the second-section hypoxia reactor and the second-section aerobic reactor are connected with each other in sequence; the sewage proportional water inflow partition water tank is communicated with the anaerobic reactor and the second-section hypoxia reactor through sewer pipelines respectively, so as to realize two-sectional sewage inflow, which utilizes the carbon source of raw water to the maximum extent. Therefore, the biological nitrogen and phosphorus removal of sewage can be realized without additional carbon source. Moreover, the device requires no mixed liquid inner circumfluence facility, which saves power equipment cost and related civil engineering cost of the NISS nitrogen and phosphorus removal device, namely, the equipment cost and related cost of a water treatment plant can be saved greatly.
Description
Technical field
The utility model belongs to activated sludge biochemical method technical field of sewage, be specifically related to a kind of remove in the sewage can biochemical organic substance and the no internal reflux of nitrogenous phosphorus nutrition thing divide two-stage water NISS (No Inner circumfluence with Stepfeed System) device of denitrogenation dephosphorizing.
Background technology
Nitrogen and phosphorus are biological important nutrition sources, and along with chemical fertilizer, washing composition and agricultural chemicals generally use, nitrogen, phosphorus content sharply increase in the natural water body; Blue-green algae, green alga breed in a large number in the water body; Water hypoxia also produces toxin, makes water quality deterioration, and hydrobiont and HUMAN HEALTH are produced very big harm.The existing municipal sewage plant of China mainly concentrates on organic dirt (giving up) water one-level of removing and handles grit and the suspended solids that just removes in anhydrating; In aerobe was handled, sewage was through biological degradation, and most solubility carbonaceous organic material is removed, and produces NH simultaneously
3-N
-N with
With
It then is the dissolved organic matter of removing in the water that two stage biological is handled, and can reduce the BOD in the sewage effectively
5(five-day BOD) and SS (Suspended Substance, the suspended substance in the water quality), but can only remove 10%～20% to nutrition such as N, P, its result far can not reach secondary discharge standard.Therefore research and development are economical, efficiently, are suitable for the denitrification dephosphorization technique that existing sewage work transforms and seem particularly important.
From the mechanism of biological carbon and phosphorous removal, the biological carbon and phosphorous removal process generally needs anoxic and aerobic hocketing, and technology consists essentially of anaerobism, anoxic, aerobic three state.Traditional denitrification dephosphorization technique mainly contains following several kinds:
A/O technology: A/O (Anoxic/Oxic) method is improved activated sludge process; Leading portion anoxic section and back segment aerobic section are cascaded; Anoxic section heterotrophic bacterium suspended contaminant such as the starch in the sewage, fiber, glucide and dissolved organic matter are hydrolyzed to organic acid; Make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter, when these products through anaerobic hydrolysis get into Aerobic Pond; Improve the biodegradability of sewage, improve the efficient of oxygen; Ammonia (NH dissociates anoxic section heterotrophic bacterium pollutents such as protein to be carried out ammonification (N on the organic chain or the amino in the amino acid)
3, NH
4 +), under sufficient oxygen supply condition, the nitrification of autotrophic bacteria is with NH
3-N (NH
4 +) be oxidized to NO
3 -, be back to the A pond through the control that refluxes, under anoxia condition, the denitrification of heterotrophic bacteria is with NO
3 -Be reduced to molecular nitrogen (N
2) accomplish C, N, the circulation of O in ecology, realize the sewage harmless treatment.This technology is higher to organic degradation rate, and shortcoming is that the denitrogenation dephosphorizing effect is relatively poor.
A
2O technology: A
2The sewage of O (Anaeroxic-Anoxic-Oxic) biological denitrification phosphorous removal technique gets into the anaerobic reaction district; What get into simultaneously also has from the active sludge of second pond backflow; PolyP bacteria is under anaerobic released phosphorus; Conversion simultaneously is prone to degraded COD (chemical oxygen demand chemical oxygen demand), VFA (volatile fatty acid, i.e. voltaile fatty acid) is PHB, and the part itrogenous organic substance carries out ammonification.Get into anoxic reacter afterwards and carry out denitrogenation; Nitric nitrogen is transmitted by aerobic reactor through the mixed solution internal recycle; Usually the internal reflux amount is a 2-4 times of raw waste water flow, and partial organic substances is utilized nitrate salt to obtain degraded as electron acceptor(EA) under the effect of denitrifying bacteria and removed.Mixed solution gets into aerobic reactor zone from the hypoxia response district afterwards; COD concentration in the mixed solution is basically near emission standard; At aerobic reactor zone except that further degradation of organic substances; Mainly carry out the absorption of the nitrated and phosphorus of ammonia nitrogen, nitric nitrogen is back to the hypoxia response district in the mixed solution, and the phosphorus of excessive absorption is got rid of through excess sludge in the mud.This technology can be called the simplest synchronous denitrogen dephosphorus technology in system, but the difficult raising of denitrogenation dephosphorizing effect of this technology.
UCT technology: UCT (University of Capetown) is to be similar to A
2A kind of denitrification dephosphorization technique of/O technology, its difference are that settling tank mud is back to anoxic pond rather than is back to anaerobic pond, can prevent because nitrate nitrogen gets into anaerobic pond, destroy the anaerobic state of anaerobic pond and influence the dephosphorizing rate of system.Increased the mixed-liquor return from the anoxic pond to the anaerobic pond, in the mixed solution that anaerobic pond refluxes, contain more solvability BOD by anoxic pond, and nitrate salt seldom, for the hydrolysis of organic matter reaction of being carried out in the anaerobism section provides optimum condition.But in actual moving process, when the ratio of kjeldahl nitrogen TKN and COD was high in intaking, the reflux ratio that needs to reduce mixed solution was to prevent NO
3 -Get into anaerobic pond.If but reflux ratio is too little, can increase the actual residence time in hypoxia response pond, if the actual residence time in hypoxia response pond surpasses 1h, the settling property of mud can worsen in some unit.
In addition, A
2Be provided with the internal reflux facility of mixed solution in O technology and the UCT process unit, on engineering, the equipment of water factory and maintenance cost are higher relatively.
The utility model content
To the defective that exists in the prior art; The purpose of the utility model is to provide a kind of not to be had internal reflux and divides two-stage water NISS the device of denitrogenation dephosphorizing; Realize the efficient dephosphorization performance and build up stable denitrification denitrogenation through this device, reduce the running cost of water factory simultaneously effectively.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is following:
A kind of do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing; Comprise the settling tank that the sewage that is connected with intake pump is intake in proportion and cut apart water tank, the first section anoxic reacter, anaerobic reactor, first section aerobic reactor, second section anoxic reacter, the second section aerobic reactor that connect in order and be provided with water outlet; And the mud external reflux pipeline that is back to first section anoxic reacter from settling tank; Wherein, Sewage is intake in proportion and is cut apart water tank and be communicated with anaerobic reactor and second section anoxic reacter through sewer pipeline respectively; In first section anoxic reacter, anaerobic reactor and second section anoxic reacter whisking appliance is installed all, the bottom of first section aerobic reactor and second section aerobic reactor is equipped with tube aerator, and tube aerator is communicated with gas blower; The settling tank bottom is communicated with first section anoxic reacter.
Further; Aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing; Said sewage is intake in proportion, and to cut apart water tank be that inside is divided into four little orthogonal rectangular reactor; Big and parallel bottom, the left and right sides is communicated with according to preceding two rectangles of water inlet order etc., and latter two rectangle is not communicated with parallel bottom up and down, and second rectangle is communicated with the 3rd rectangle and the 4th rectangle through the overflow weir on top.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, and said sewage latter two orthogonal ratio of cutting apart water tank of intaking in proportion is 0.8Q: 0.2Q, and Q representes the total inflow of system.
Further; Aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, and first section anoxic reacter, anaerobic reactor, first section aerobic reactor, second section anoxic reacter are connected through the dividing plate that is provided with communicating vessels with second section aerobic reactor in order.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, and said dividing plate is provided with riser.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, and gas blower is communicated with tube aerator through air control valve.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, and the settling tank bottom is communicated with first section anoxic reacter through returned sluge valve and sludge reflux pump.
Further again, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, and said device also comprises the excess sludge discharge valve that is connected with the settling tank bottom.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the device of denitrogenation dephosphorizing, is respectively equipped with the DO instrument in first section aerobic reactor and second section aerobic reactor.
The beneficial effect of the utility model is following:
(1) through former water (sewage) being divided two sections entering each section anaerobic reactors or anoxic reacter put phosphorus and anti-nitration reaction; Farthest utilized former water carbon source; Therefore need not the biological carbon and phosphorous removal that additional carbon can be realized sewage, broken through the difficult problem that low C/N, C/P sewage denitrification and dephosphorization efficient are difficult to improve;
(2) divide the two-stage water denitrification process to compare with even flow A/O; This technology has realized the function of biological phosphate-eliminating through anaerobic reactor is set, and has increased the actual application value of dividing two-stage water technology; Help the regenerated using of sewage, prevent the generation of body eutrophication;
(3) with traditional A
2/ O, UCT technology are compared, and this technology need not to be provided with the internal reflux facility of mixed solution, have saved the equipment and the maintenance cost of water factory to a great extent;
(4) first of first section setting section anoxic reacter and anaerobic reactor; Be equivalent to biological selector, in the acidication effect, except having increased the shock resistance of system; Suppress hyphomycetic growth to a certain extent, reduced the possibility of total system generation Filamentous Bulking;
This device is the series operation pattern of continuous two sections A/O technologies with the nitrated stage improvement of UCT technology; And detest with each section, the strategy of oxygen-starved area branch water inlet combines; Realization has the synchronous denitrification dephosphorizing of denitrification dephosphorization function, is applicable to big-and-middle-sized town domestic sewage and the dephosphorization of trade effluent advanced nitrogen processing.
Description of drawings
Fig. 1 does not have the structural representation that internal reflux divides the device of two-stage water NISS denitrogenation dephosphorizing for the utility model is a kind of.
Embodiment
Below in conjunction with Figure of description and embodiment the utility model is done further detailed description.
At first the structure title to each the Reference numeral representative in the accompanying drawing 1 describes:
Among Fig. 1: the 1-intake pump; 2-sewage is intake in proportion and is cut apart water tank; First section anoxic reacter of 3-; The 4-anaerobic reactor; First section aerobic reactor of 5-; 6-gas blower (air); Second section anoxic reacter of 7-; Second section aerobic reactor of 8-; The 9-settling tank; The 10-whisking appliance; The 11-tube aerator; The 12-air control valve; 13-returned sluge valve; The 14-sludge reflux pump; 15-excess sludge discharge valve; The 16-DO instrument.
Fig. 1 has shown that the utility model is a kind of not to have a structural representation that internal reflux divides the device of two-stage water NISS denitrogenation dephosphorizing; This device mainly comprises intake pump 1; The settling tank 9 that intake pump 1 and sewage are intake in proportion and cut apart first section anoxic reacter 3 that water tank 2 is connected, connects in order, anaerobic reactor 4, first section aerobic reactor 5, second section anoxic reacter 7, second section aerobic reactor 8 and be provided with water outlet; And the mud external reflux pipeline that is back to first section anoxic reacter 3 from settling tank 9; Sewage is intake in proportion and is cut apart water tank 2 and be communicated with anaerobic reactor 4 and second section anoxic reacter 7 through sewer pipeline respectively; Realize segmental influent, wherein, in first section anoxic reacter 3, anaerobic reactor 4 and second section anoxic reacter 7 whisking appliance 10 that has step-down gear is installed all; First section aerobic reactor 5 and second section aerobic reactor 8 bottom are equipped with tube aerator 11, and gas blower 6 is communicated with tube aerator 11 through air control valve 12; It is 5 reactor drums that first section anoxic reacter 3, anaerobic reactor 4, first section aerobic reactor 5, second section anoxic reacter 7 and second section aerobic reactor 8 are divided into said each reactor drum through the dividing plate that is provided with communicating vessels; In order to prevent the air-teturning mixed phenomenon of mixed solution, also be provided with riser on the dividing plate; Settling tank 9 bottoms are communicated with first section anoxic reacter 3 through returned sluge valve 13 and sludge reflux pump 14; Also be provided with DO instrument 16 in first section aerobic reactor 5 and second section aerobic reactor 8; Dissolved oxygen concentration in two reactor drums is by DO instrument 16 Online Monitoring Control, as the controlled variable of regulating each section tube aerator 11 aeration valves.In addition; The bottom of settling tank 9 also is connected with excess sludge discharge valve 15; Mixed solution in second section aerobic reactor 8 gets into settling tank 9 when carrying out mud-water separation, and supernatant is discharged along overflow weir, and sludge settling is at sludge bucket; A part is promoted to first anoxic reacter 3 through returned sluge valve 13 and sludge reflux pump 14, and another part precipitating sludge is discharged through mud discharging valve 15 as excess sludge and done harmless treatment.
In order better to understand the utility model, use in the face of the operation of the major parts in this device and this device down to be elaborated.
First section anoxic reacter 3: sludge reflux pump 14 gets into first section anoxic reacter 3 through the adjusting of external reflux mud valve 13 from the mud that settling tank 9 extracts; Mix with the mixed solution (this original active sludge intermixture in first section anoxic reacter) in first section anoxic reacter; In first section anoxic reacter 3, accomplish the part polyP bacteria under the stirring action of whisking appliance 10 and absorb the biodegradable organic in the former water; Form with internal carbon source PHB is stored in the polyP bacteria body, discharges a large amount of solvability orthophosphoric acid salt simultaneously.The precondition of aerobic Absorption of Phosphorus is the anaerobism release that mixed solution must pass through phosphorus, and in effective dispose procedure, the anaerobism of phosphorus discharges the aerobic suction phosphorus ability of mikrobe is improved greatly.Not being both of aerobic suction phosphorus speed put by anaerobism that phosphorus speed difference causes.The anaerobism section puts that phosphorus speed is big, and the phosphorus burst size is big, and synthetic PHB is just many, so when aerobic section since decomposed P HB and synthetic to gather hydrochlorate speed just bigger, so the aerobic suction phosphorus speed that shows is also just big; Phosphorus absorb phosphorus is discharged also influential, phosphorus absorb accomplish more thoroughly, to gather the phosphorus amount big more, effective release of phosphorus is also guaranteed more under the corresponding anaerobic state.Through the phosphorus of putting of two anaerobious sections, ensuing aerobic section is inhaled phosphorus provides very favorable condition.
Anaerobic reactor 4: the heterotrophic denitrification bacterium utilizes residual organic substances to carry out anti-nitration reaction under the stirring action of anaerobic reactor whisking appliance 10, and denitrifying bacteria is the bacterium that belongs to the heterotroph facultative anaerobe.Under anaerobic, with nitrate nitrogen (NO
3-N) be electron acceptor(EA), be electron donor with organism (organic carbon).In denitrification process, nitrate nitrogen has two kinds of path for transformation through the Metabolic activity of denitrifying bacteria; A kind of approach is an assimilation denitrification (synthesizing), finally forms organic nitrogen compound, becomes the integral part of thalline; Another kind of approach is alienation denitrification (decomposition), and final product is a gaseous nitrogen.In this simultaneously part denitrification phosphorus-collecting bacterium be electron acceptor(EA) with nitrate salt, storing intravital PHB with anaerobic reactor is that electron donor is accomplished denitrifying phosphorus uptake, realizes the synchronous removal of nitrogen phosphorus.
First section aerobic reactor 5: anaerobic reactor goes out water mixed liquid and directly gets into first section aerobic reactor, by the gas blower in the aerating system aeration is provided, the remaining few organism of heterotrophic bacterium oxidation, and nitrifier is with NH
4 +-N is converted into NO
x --N, polyP bacteria comprise that the denitrification phosphorus-collecting bacterium accomplishes aerobic suction phosphorus process.The size of aeration rate is adjusted according to running status Inlet and outlet water situation utilization spinner-type flowmeter, controls first section aerobic reactor water outlet NH
4 +-N is at 0～3mg/L, if water outlet NH
4 +-N exceeds this scope, will adjust aeration rate, guarantees nitrification effect.
Second section anoxic reacter 7: partial raw water and second section anoxic reacter 7 of first section aerobic reactor 5 nitrification liquids entering have denitrification and dephosphorization function concurrently under the stirring action of whisking appliance 10 amphimicrobe utilizes entering organic matter of water to carry out anti-nitration reaction, follows phosphatic absorption simultaneously.
The volume of 8: the second sections aerobic reactors of second section aerobic reactor is less than the volume of first section aerobic reactor, and its function is similar with first section aerobic reactor 3.Second section anoxic reacter 7 goes out water mixed liquid and directly gets into second section aerobic reactor 8; By the gas blower in the aerating system 6 aeration is provided; Accomplish mikrobe to remaining the aerobic absorption of a small amount of organism and phosphorus, and nitration reaction is to the aerobic absorption of the nitrated and phosphorus of the removal of ammonia nitrogen and ammonia nitrogen.
9: the second sections aerobic reactor 8 mixed solutions of settling tank get into settling tank 9 and carry out mud-water separation; Supernatant is discharged along overflow weir; Sludge settling is at sludge bucket; A part is promoted to first section anoxic reacter 3 through returned sluge valve 13 and sludge reflux pump 14, and another part precipitating sludge is discharged through mud discharging valve 15 as excess sludge and done harmless treatment.
In order to realize accurately dividing in proportion the test conditions of two-stage water; The testing apparatus reactor drum sewage of being selected for use in this embodiment is intake in proportion, and to cut apart water tank 2 be that an inside is divided into four little orthogonal rectangular reactor; By the water inlet order; Preceding two rectangles in the water tank such as are at parallel bottom, big left and right sides UNICOMs, and sewage gets into water tank from first rectangle top, flow into second rectangle from the bottom; Then through in the 3rd and the 4th rectangle of the zigzag overflow weir in top inflow uniformly; The 3rd is the disconnected reactor drum in parallel bottom up and down with the 4th rectangle, and size is strict ratio in 4: 1, and promptly in flooding quantity 0.8Q: the 0.2Q ratio designs; Useful volume is 370L; Through with the 3rd and the 4th orthogonal volume ratio in strict accordance with design in 4: 1, with the segmentation that realizes anaerobic reactor 4 and second section anoxic reacter 7 intake in proportion (be anaerobic reactor 4 be communicated with, second section anoxic reacter 7 is communicated with the 4th rectangle) with sewage the 3rd rectangle cutting apart water tank of intaking in proportion.This device is divided into 5 reactor drum operations: first reactor drum is first section anoxic reacter 3 (260L); Second reactor drum is anaerobic reactor 4 (640L); And then three reactor drums are first section aerobic reactor 5 (1920L), are that second section anoxic reacter 7 (1600L), second section aerobic reactor 8 (640L), settling tank 9 useful volumes are 2000L then successively.In first section anoxic reacter 3, anaerobic reactor 4, second section anoxic reacter 7, whisking appliance 10 is installed all, is in complete admixture to keep internal system mud; Wherein first section aerobic reactor 5, second section aerobic reactor 8 bottom are equipped with tube aerator 11, and gas blower 6 is communicated with tube aerator 11 through air control valve 12; Each section detested, anoxic reacter is connected with aerobic reactor at interval in order; Settling tank 9 bottoms are communicated with first section anoxic reacter 3 through returned sluge valve 13 and sludge reflux pump 14, and excess sludge is done harmless treatment through excess sludge discharge valve 15 discharge systems; First section aerobic reactor 5, second section aerobic reactor 8 dissolved oxygen concentration are by DO instrument 16 Online Monitoring Control, as the controlled variable of regulating each section tube aerator 11 aeration valves.Wherein air feeder arrives pressurized air in first section aerobic reactor 5 and second section aerobic reactor 8 through supply air line.Each section aerobic reactor dissolved oxygen concentration bloats micro bubble through tube aerator 11 and satisfies microorganism growth through air control valve 12 regulating and controlling; Water inlet, mud external reflux promote metering through intake pump 1, sludge reflux pump 14 respectively, and each reactor drum separates through dividing plate, and dividing plate is provided with riser to prevent the air-teturning mixed phenomenon of mixed solution.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technology thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
Claims (9)
1. one kind is not had internal reflux and divides two-stage water NISS the device of denitrogenation dephosphorizing; Comprise the settling tank (9) that the sewage that is connected with intake pump (1) is intake in proportion and cut apart water tank (2), the first section anoxic reacter (3), anaerobic reactor (4), first section aerobic reactor (5), second section anoxic reacter (7), the second section aerobic reactor (8) that connect in order and be provided with water outlet; And the mud external reflux pipeline that is back to first section anoxic reacter (3) from settling tank (9); It is characterized in that: sewage is intake in proportion and is cut apart water tank (2) and be communicated with through sewer pipeline and anaerobic reactor (4) and the second scarce section oxygen reactor (7) respectively; In first section anoxic reacter (3), anaerobic reactor (4) and the second section anoxic reacter (7) whisking appliance (10) is installed all; The bottom of first section aerobic reactor (5) and second section aerobic reactor (8) is equipped with tube aerator (11), and tube aerator (11) is communicated with gas blower (6); Settling tank (9) bottom is communicated with first section anoxic reacter (3).
2. no internal reflux as claimed in claim 1 divides two-stage water NISS the device of denitrogenation dephosphorizing; It is characterized in that: said sewage is intake in proportion and is cut apart water tank (2) and be divided into four little orthogonal rectangular reactor for inside; According to the big and left and right sides parallel bottom connections such as preceding two rectangles of water inlet order; Latter two rectangle up and down parallel bottom is not communicated with, and second rectangle is communicated with the 3rd rectangle and the 4th rectangle through the overflow weir on top.
3. no internal reflux as claimed in claim 2 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: said sewage latter two orthogonal ratio of cutting apart water tank (2) of intaking in proportion is 0.8Q: 0.2Q, and Q representes the total inflow of system.
4. no internal reflux as claimed in claim 1 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: first section anoxic reacter (3), anaerobic reactor (4), first section aerobic reactor (5), second section anoxic reacter (7) and second section aerobic reactor (8) are connected through the dividing plate that is provided with communicating vessels in order.
5. no internal reflux as claimed in claim 4 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: said dividing plate is provided with riser.
6. no internal reflux as claimed in claim 1 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: gas blower (6) is communicated with tube aerator (11) through air control valve (12).
7. no internal reflux as claimed in claim 1 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: settling tank (9) bottom is communicated with first section anoxic reacter (3) through returned sluge valve (13) and sludge reflux pump (14).
8. no internal reflux as claimed in claim 1 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: said device also comprises the excess sludge discharge valve (15) that is connected with settling tank (9) bottom.
9. no internal reflux as claimed in claim 1 divides two-stage water NISS the device of denitrogenation dephosphorizing, it is characterized in that: be respectively equipped with DO instrument (16) in first section aerobic reactor (5) and the second section aerobic reactor (8).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113666493A (en) * | 2021-08-16 | 2021-11-19 | 天津大学 | Anaerobic/anoxic denitrification phosphorus removal bacteria biomembrane reaction method and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113666493A (en) * | 2021-08-16 | 2021-11-19 | 天津大学 | Anaerobic/anoxic denitrification phosphorus removal bacteria biomembrane reaction method and equipment |
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