CN101423296A - Hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and apparatus - Google Patents
Hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and apparatus Download PDFInfo
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Abstract
A hypoxic/anaerobic UASB-SBR landfill leachate short-range biodenitrification method and device belongs to the biological treatment technology field of wastewater. A hypoxic/anaerobic UASB-SBR biochemical system is used for achieving synchronous and deep removal of organic matters and nitrogen in landfill leachate by the short-range biodenitrification. By using the way of the return of SBR nitrification liquid, not only a certain degree of dilution function is carried out on the original leachate, but also the nitrification liquid containing rich NO2<->-N can conduct denitrification with the help of rich organic carbon sources in raw water, so two functions of denitrification (hypoxic reaction) and methane generation (anaerobic reaction) are achieved in the same UASB reactor, the removal rate of more than 94.4 percent of organic matters and the denitrification rate of more than 99.5 percent are obtained, and the dual objectives of biological nitrogen removal and organic matter removal are achieved. The SBR reactor obtains over 99.5 percent of nitrification and denitrification rate; the effluent total nitrogen is less than 20mg/L; and deep nitrogen removal is obtained. In addition, pH, ORP, and DO are used as the control parameters in the biological nitrogen removal process of an SBR system, so the nitrification and denitrification terminals of the SBR reactor can be accurately monitored, and the operating cost is saved.
Description
Technical field
The present invention relates to a kind of biological method for treating waste water and device, particularly a kind of high ammonia nitrogen, high organic organic industrial sewage biological denitrificaion, the organic sewage water treatment method of removal and device.
Background technology
City garbage percolate is the very complicated high concentrated organic wastewater of a kind of composition, and wherein high ammonia nitrogen and high organism are its important water quality characteristics.In addition, percolate is chocolate, and the processing that strong impulse and a large amount of mineral compound are percolate brings difficulty.Because biological denitrificaion can be realized the nitrogen of real meaning and remove, but not " pollution is married again ", thus biological process be the treating refuse percolate most economical, effectively reach most widely used method.With aerobe method Comparatively speaking, to have energy consumption aspect the high concentrated organic wastewater low handling for anaerobic biological process, sludge yield is few, and organic loading is high and produce available stock advantages such as (biogas), therefore can select the pretreatment technology of anaerobic biological process as percolate.
In addition, because percolate ammonia-nitrogen content height, water quality is very complicated and change with the variation of landfill time, early stage percolate ammonia nitrogen and COD are all very high, and late period, the percolate ammonia-nitrogen content increased, but COD concentration reduces significantly, cause the carbon-nitrogen ratio imbalance.Make it compare own outstanding feature with other waste water such as municipal effluents.The denitrogenation problem of high ammonia-nitrogen wastewater is the emphasis and the difficult point of research both at home and abroad always, the percolate that refuse treatment in the past produced mainly relies on Water table to purify, but along with the prolongation of time and address architecture finiteness to the removal capacity of pollutent, percolate can pollute underground water, surface water and refuse landfill surrounding environment, make surface water anoxic, water quality deterioration, eutrophication, threaten tap water and industrial or agricultural water water source, groundwater quality is polluted and the forfeiture utility value.Simultaneously, organic pollutant enters food chain and will directly threaten human health.Percolate is as a kind of high density, polycomponent, labile sewage, and its major cause that is difficult to handle is the water quality characteristics that it is special, and this has just determined conventional sewage water treatment method and infeasible.In view of the foregoing, sewage water treatment method and the device of setting up a kind of suitable percolate water quality characteristics are very necessary, have important and practical meanings.
Summary of the invention
The purpose of this invention is to provide a kind of percolate shortcut biological denitrification method and device, solve the technical problem that high ammonia nitrogen percolate is difficult to carry out a biological disposal upon; And solve the high concentrated organic wastewater advanced nitrogen, the degree of depth is removed organic problem.
Technical scheme of the present invention, hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and device is characterized in that:
This hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method is characterized in that, may further comprise the steps:
(1) percolate is pumped to hypoxic/anaerobic UASB reactor with the SBR nitrification liquid supernatant liquor (backflow volume is than 3:1) of backflow by hypoxic/anaerobic UASB nitrification liquid intake pump by hypoxic/anaerobic UASB percolate intake pump from integrated water tank, denitrifying bacteria in the reactor and anaerobic methanogens make full use of into abundant organism in the water, carry out anoxic denitrification and anaerobism and produce methane reaction, organic carbon source abundant in the denitrifying bacteria utilization water inlet is with the NO in the SBR nitrification liquid recirculation water
2 --N is reduced to N
2, finish the removal of nitrogen.Methanogen becomes CH with oxidation operation in the above-mentioned hypoxic/anaerobic UASB reactor simultaneously
4, H
2O and CO
2Thereby, realize organic removal.
(2) water outlet of hypoxic/anaerobic UASB reactor relies on run by gravity to intermediate water tank.
(3) water in the intermediate water tank is by the effect of SBR intake pump, enter the sbr reactor device, after water inlet is finished, open air compressor, air provides respiration needed oxygen by flue, gas meter and air-diffuser to the microorganism of sbr reactor device, at first under the respiration of heterotrophic bacterium, but the degree of depth is removed remaining organism in the water, and the autotrophy nitrifier is with NH simultaneously
4 +-N is an electron donor, and oxygen is electron acceptor(EA), with NH
4 +-N is oxidized to NO
2 --N has realized the removal of ammonia nitrogen,
(4) during the nitrated end of above-mentioned sbr reactor device, behind the quiescent setting 30～60 minutes, start SBR nitrification liquid reflux pump, nitrification liquid is back to SBR nitrification liquid recirculating zone by SBR nitrification liquid return line, enters hypoxic/anaerobic UASB reactor by means of hypoxic/anaerobic UASB nitrification liquid intake pump then and carry out denitrification;
(5) above-mentioned SBR nitrification liquid refluxes when finishing, and adds carbon source as electron donor in reactor, makes COD/NO
2 --N is controlled at 3.5, starts mechanical stirring device, with the electron acceptor(EA) NO in the mixed solution
2 -The intact nitrogen N that is reduced into of-N
2Thereby, finished the nitrogen degree of depth and removed.
(6) after above-mentioned SBR denitrification is finished, stop mechanical stirring device, make the interior muddy water mixed solution quiescent setting of sbr reactor device 30～60 minutes, carry out mud-water separation, supernatant liquor is directly discharged by the SBR water discharge valve.
This hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification apparatus is characterized in that:
Be composed in series by integrated water tank, hypoxic/anaerobic UASB reactor, intermediate water tank, sbr reactor device;
Hypoxic/anaerobic UASB reactor is provided with the inner circulating reflux pipe;
Be connected with SBR nitrification liquid return line at sbr reactor device and SBR nitrification liquid recirculating zone;
Former diafiltration liquid zone in the integrated water tank, SBR nitrification liquid recirculating zone is communicated with hypoxic/anaerobic UASB reactor bottom water-in by hypoxic/anaerobic UASB percolate water inlet pipe and hypoxic/anaerobic UASB nitrification liquid water inlet pipe respectively, the built-in triphase separator of hypoxic/anaerobic UASB reactor, the top is provided with vent valve, vapor pipe and is communicated with external alkali lye absorption bottle, and alkali lye bottle absorption bottle is connected with gas meter.Hypoxic/anaerobic UASB internal recycle outlet valve is communicated with the bottom water-in by hypoxic/anaerobic UASB internal recycle water pipe, and hypoxic/anaerobic UASB rising pipe is communicated with intermediate water tank.The sbr reactor device is communicated with intermediate water tank by the SBR water inlet pipe, is provided with air-diffuser and mechanical stirring device in the sbr reactor device.The sbr reactor device leads to logical by SBR nitrification liquid return line and SBR nitrification liquid recirculating zone.
The mechanism of hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification process of the present invention: at first, in same UASB reactor, realize denitrification (hypoxia response) and produce two kinds of effects of methane (anaerobic reaction), realize biological denitrificaion and removed organic dual purpose, therefore it has been referred to as hypoxic/anaerobic UASB reactor.Denitrification is meant that denitrifying bacteria is an electron donor with the organism in the water inlet, with NO
2 --N is an electron acceptor(EA), with NO
2 --N is reduced to the biochemical reaction process of nitrogen.The anaerobism methanogenesis is meant methanogen under anaerobic, with the oxidation operation CH in the water inlet
4, H
2O and CO
2Biochemical reaction process, thereby realize organic removal.Organism becomes H in the respiration of sbr reactor device by aerobic microbiological with oxidation operation in the water outlet of hypoxic/anaerobic UASB reactor
2O and CO
2Thereby, realize organic further removal.
For ammonia nitrogen in high density in the percolate, because the diluting effect that the SBR nitrification liquid refluxes, the influent concentration of hypoxic/anaerobic UASB reactor has been realized reduction to a certain degree than stoste, really removes by means of the short-cut nitrification and denitrification realization nitrogen of sbr reactor device then.Short-cut nitrification and denitrification comprises two steps of nitrification and denitrification, nitratedly is meant that ammonia oxidation bacteria is with NH under aerobic condition
4 +-N is oxidized to nitrite nitrogen NO
2 -The process of-N.Denitrification is meant that under anoxia condition the heterotrophic denitrification bacterium is an electron donor with the organism, with NO
2 --N is an electron acceptor(EA), with NO
2 --N is reduced to the process of nitrogen.
Beneficial effect:
The present invention is process object with the city domestic refuse percolation liquid, under the prerequisite that guarantees effluent quality, mainly solves the technical problem that high ammonia nitrogen percolate is difficult to carry out a biological disposal upon; And solve the high concentrated organic wastewater advanced nitrogen, the degree of depth is removed organic problem; Also solve the problem that makes things convenient for experimental applications and control techniques parameter.Adopt the organism in the UASB reactor for treatment high-concentration waste water, it is low to have energy consumption, and sludge yield is few, load advantages of higher, thereby drawback such as it is big to avoid directly adopting aerobe method to handle the energy consumption that causes, and surplus sludge volume is big.In addition, the main units that adopts SBR technology to remove as nitrogen, having made full use of the SBR method, to have technology simple, cost saving; Ideal plug-flow process biochemical reaction impellent is big, efficient is high; Operation scheme is flexible, good denitrogenation and dephosphorization effect; Prevent sludge bulking and anti impulsion load, processing efficiency advantages of higher.
This hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification process has the following advantages:
Among the present invention, in same reactor, realize denitrification and produce two kinds of biochemical reactions of methane, realized that synchronous, the degree of depth of interior organism of percolate and nitrogen removed.In hypoxic/anaerobic UASB reactor, obtained the organic removal rate more than 94.4% and be higher than 99.5% denitrification rate.
Among the present invention, the mode of taking the SBR nitrification liquid to reflux to the existing certain diluting effect of former percolate, can make again and be rich in NO
2 -The nitrification liquid of-N carries out denitrification by organic carbon source abundant in the former water, realizes the wastewater treatment theory of " treatment of wastes with processes of wastes against one another ", thereby has obtained the dual purpose of biological denitrificaion and degradation of organic substances.
Among the present invention,, press COD/NO in the anoxic section of sbr reactor device
2 -The ratio of-N=3.5 adds carbon source, makes system's water outlet total nitrogen be lower than 20mg/L, has obtained advanced nitrogen.
In the present invention, in hypoxic/anaerobic UASB reactor, carry out denitrification and can produce a large amount of basicity, these basicity are back to follow-up SBR nitrifying process, can guarantee finishing smoothly of nitrification, saved the throwing alkali number in nitrated stage of SBR again greatly.
Among the present invention, adopt pH, ORP, DO is as SBR system biological denitrification process controlled variable.In the whole biological denitrification process, three nitrogen (NH in the system
4 +-N, NO
3 --N, NO
2 --N) Changing Pattern and pH, ORP, the variation of DO has good dependency, in the nitrifying process, owing to produce H in the biochemical system
+, the pH value reduces gradually in the system, reduce to during nitrated end minimum, ORP, the DO value then occurs more prominent.In the denitrification process, owing to produce basicity in the system, the pH value raises gradually, and ORP reduces gradually, and pH reaches maximum value and flex point occurs during the denitrification end, and ORP reduces gradually and flex point also occurs.Therefore, when the pH value reduces as far as possible and rises to vertex, indicate the nitrification and denitrification reaction to finish respectively, can stop aeration and anoxia stirring immediately, thereby prevented from effectively to cross aeration and cross and stir the energy consumption of bringing, saved working cost.
Description of drawings
Fig. 1 is hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and device synoptic diagram:
Fig. 2 is the change in concentration figure of COD in hypoxic/anaerobic UASB-SBR biochemical system;
Fig. 3 is NH
4 +The change in concentration figure of-N in hypoxic/anaerobic UASB-SBR biochemical system.
Among Fig. 1:
The integrated water tank of A-: the former diafiltration of 1-liquid zone, 2-SBR nitrification liquid recirculating zone;
B-hypoxic/anaerobic UASB reactor: 3-percolate outlet valve, 4-hypoxic/anaerobic UASB percolate intake pump, 5-hypoxic/anaerobic UASB percolate water inlet pipe, 6-nitrification liquid outlet valve, 7-hypoxic/anaerobic UASB nitrification liquid intake pump, 8-hypoxic/anaerobic UASB nitrification liquid water inlet pipe, 9-hypoxic/anaerobic UASB internal recycle outlet valve, 10-hypoxic/anaerobic UASB internal recycle water pipe, 11-hypoxic/anaerobic UASB internal circulation pump, the 12-triphase separator, the 13-vent valve, the 14-vapor pipe, 15-alkali lye absorption bottle, the 16-gas meter, 17-hypoxic/anaerobic UASB rising pipe, the 18-intermediate water tank, 19-intermediate water tank outlet valve.
C-SBR reactor: 20-SBR water inlet pipe, 21-SBR intake pump, 22-air compressor, 23-flue, 24-gas meter, 25-air-diffuser, 26-SBR nitrification liquid reverse flow valve, 27-SBR nitrification liquid reflux pump, 28-SBR nitrification liquid return line, 29-mechanical stirring device, 30-SBR water discharge valve, 31-SBR blow-down pipe and shore pipe.
Embodiment
Referring to Fig. 1, the idiographic flow that the present invention carries out the percolate processing is:
Percolate is pumped to hypoxic/anaerobic UASB reactor B with the SBR nitrification liquid supernatant liquor (backflow volume is than 3:1) that refluxes by hypoxic/anaerobic UASB nitrification liquid intake pump 7 by hypoxic/anaerobic UASB percolate intake pump 4 from integrated water tank A, denitrifying bacteria in the reactor and anaerobic methanogens make full use of into abundant organism in the water, carry out anoxic denitrification and anaerobism and produce methane reaction, make that organism is fully degraded.Hypoxic/anaerobic UASB reactor B-water outlet rely on run by gravity to intermediate water tank 18.Water in the intermediate water tank 18 enters sbr reactor device C by the effect of SBR intake pump 21, at first by the aerobic respiration effect of heterotrophic bacterium and nitrifier, finishes that the organic degree of depth in the hypoxic/anaerobic UASB water outlet is removed and (the NH of conversion fully of ammonia nitrogen
4 +-N → NO
2 --N), the nitrification liquid of quiescent setting after 30～60 minutes is back to SBR nitrification liquid recirculating zone 2, by the anoxic section of SBR, add carbon source as electron donor, then with the electron acceptor(EA) NO in the mixed solution
2 -The intact nitrogen N that is reduced into of-N
2Thereby, finished the synchronous degree of depth of organism and nitrogen and removed.
Using technology of the present invention, to carry out the concrete steps that percolate handles as follows:
(1) opens percolate outlet valve 3, start hypoxic/anaerobic UASB percolate intake pump 4, open nitrification liquid outlet valve 6 simultaneously, start hypoxic/anaerobic UASB nitrification liquid intake pump 7, percolate and SBR nitrification liquid together are pumped to hypoxic/anaerobic UASB reactor B through hypoxic/anaerobic UASB filtrate water inlet pipe 5 and hypoxic/anaerobic UASB nitrification liquid water inlet pipe 8 respectively.Open hypoxic/anaerobic UASB internal recycle outlet valve 9, start hypoxic/anaerobic UASB internal circulation pump 11, carry out internal recycle by hypoxic/anaerobic UASB internal recycle water pipe 10, make liquid in hypoxic/anaerobic UASB reactor B on flow, fully contact with the microorganism in the reactor, denitrification takes place and produces the methane synchronization in the water inlet mixed solution in hypoxic/anaerobic UASB reactor B, organic carbon source abundant in the denitrifying bacteria utilization water inlet is with the NO in the SBR nitrification liquid recirculation water
2 --N is reduced to N
2, finish the removal of nitrogen.
(2) methanogen becomes CH with oxidation operation in the above-mentioned hypoxic/anaerobic UASB reactor B
4, H
2O and CO
2Thereby, realize organic removal.The N that produces in the hypoxic/anaerobic UASB reactor B
2And CH
4, CO
2Bottom-up flowing under the effect of triphase separator 12, realized that gas, liquid and solid separate, and enters alkali lye absorption bottle 15 through vent valve 13 and vapor pipe 14, in alkali lye absorption bottle 15, and the CO in the biogas
2Absorbed by alkali lye, and N
2And CH
4Then by gas meter 16 metering back dischargings.
(3) supernatant liquor of above-mentioned hypoxic/anaerobic UASB reactor B flow into intermediate water tank 18 by hypoxic/anaerobic UASB rising pipe 17 by gravity, open intermediate water tank outlet valve 19, open SBR intake pump 21, the water in the intermediate water tank 18 is pumped to sbr reactor device D by SBR water inlet pipe 20.After water inlet is finished, open air compressor 22, the gas that air compressor 22 is sent is by flue 23, gas meter 24 and air-diffuser 25, microorganism to reactor provides respiration needed oxygen, and makes microorganism and liquid thorough mixing in the reactor.
(4) the above-mentioned percolate that enters sbr reactor device C through the processing of hypoxic/anaerobic UASB reactor B, at first under the effect of heterotrophic bacterium, the degree of depth is removed remaining organism in the water outlet, and the nitrifier of autotrophy is with NH simultaneously
4 +-N is an electron donor, and oxygen is electron acceptor(EA), with NH
4 +-N is oxidized to NO
3 --N realizes the removal of ammonia nitrogen.
(5) during the nitrated end of above-mentioned sbr reactor device C, behind the quiescent setting 30～60 minutes, open SBR nitrification liquid reverse flow valve 26, start SBR nitrification liquid reflux pump 27, nitrated supernatant liquor is back to 2-SBR nitrification liquid recirculating zone by SBR nitrification liquid return line 28, is pumped in the hypoxic/anaerobic UASB reactor B and carries out denitrification.
(6) after above-mentioned SBR refluxes and finishes, add carbon source, make COD/NO
2 --N is controlled at 3.5.Open mechanical stirring device 29, denitrifying bacteria is an electron donor with the carbon source under anoxia condition, NO
2 --N is an electron acceptor(EA), with NO
2 --N is reduced to N
2
(7) after above-mentioned SBR anti-nitration reaction is finished, stop mechanical stirring device 29, make the muddy water mixed solution quiescent setting in the sbr reactor device C precipitate 30～60 minutes, carry out mud-water separation.After mud-water separation was finished, supernatant liquor was by SBR water discharge valve 30 direct discharge systems.
Experiment embodiment: the actual percolate with certain refuse landfill is a research object, and test-results shows: system has obtained stable processing performance through 100 continuous operation:
(1) the removal performance of COD: under the condition of water inlet COD average out to 6354.9mg/L, hypoxic/anaerobic UASB and SBR water outlet COD are respectively 1588.7mg/L, and 361.9mg/L, clearance are respectively 75.0% and 94.3%.The SBR water outlet is the final outflow water of system, so total system obtained 94.7% COD removal effect, and the load OLR of hypoxic/anaerobic UASB is 6.8kgCOD/m simultaneously
3D, removal speed is 4.77kgCOD/m
3D.In addition, at water inlet TC, TOC and IC are respectively 2470,1860, and under the condition of 610mg/L, water outlet is respectively 367.3,222.4, and 144.9mg/L, clearance are respectively 985%, 88% and 76%, have realized organic efficient, degree of depth removal;
(2) NH
4 +-N removes performance: at average water inlet NH
4 +-N is under the condition of 2047.6mg/L, hypoxic/anaerobic UASB and SBR water outlet NH
4 +-N is respectively 511.9mg/L and 3.2mg/L, and clearance is respectively 75.0% and 99.8%.The SBR water outlet is the final outflow water of system, so total system has obtained 99.8% NH
4 +-N clearance; For the sbr reactor device, ammonia nitrogen removal speed is 0.163kgN/m
3D realizes efficient, degree of depth ammonia nitrogen removal;
(3) denitrification capability of system: in hypoxic/anaerobic UASB reactor,, press COD/NO by means of organic carbon source abundant in the water inlet with in the anoxic section of sbr reactor device
2 --N=3.5 adds methyl alcohol as denitrifying carbon source, has all realized the denitrification rate more than 99.5%, the NO when UASB water outlet and SBR denitrification finish
2 --N is that therefore 0.5mg/L and 1.0mg/L have realized the real of nitrogen, and the degree of depth is removed.
In technology of the present invention, hypoxic/anaerobic UASB reactor is played the part of the dominant role of organic matter removal, and the sbr reactor device is then played the part of the dominant role that nitrogen is removed, because biological denitrificaion (nitrated-denitrification) is the economy that realizes that nitrogen is removed in the percolate, effective means, but not " pollution is married again ".In this experimental installation, made full use of the advantage of anaerobic biological process processing high-enriched organics, realized organic efficient removal in the percolate, select operation scheme flexible simultaneously, but the sbr reactor device of advanced nitrogen has obtained the real removal of nitrogen.The thorough denitrification that occurs in sbr reactor device anoxic section and the hypoxic/anaerobic UASB provides competent basicity for the nitrated stage of follow-up SBR, thereby guaranteed carrying out smoothly of SBR system nitrification, and obtained nitrification completely, SBR is nitrated like this is back to the ammonia nitrogen in high density that nitrification liquid in the hypoxic/anaerobic UASB reactor has diluted former percolate significantly when finishing, thereby weakened the restraining effect of the formed free ammonia of ammonia nitrogen in high density (FA) to nitrifier in the follow-up SBR system greatly, as seen the two is interrelated, mutual restriction.This experimental installation economical and efficient does not have secondary pollution, has realized the real removal of percolate middle and high concentration organism and nitrogen.
Claims (2)
1. hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification apparatus is characterized in that:
Be composed in series by integrated water tank, hypoxic/anaerobic UASB reactor, intermediate water tank, sbr reactor device; Hypoxic/anaerobic UASB reactor is provided with the inner circulating reflux pipe;
Be connected with SBR nitrification liquid return line at sbr reactor device and SBR nitrification liquid recirculating zone;
Former diafiltration liquid zone in the integrated water tank, SBR nitrification liquid recirculating zone is communicated with hypoxic/anaerobic UASB reactor bottom water-in by hypoxic/anaerobic UASB percolate water inlet pipe and hypoxic/anaerobic UASB nitrification liquid water inlet pipe respectively, the built-in triphase separator of hypoxic/anaerobic UASB reactor, the top is provided with vent valve, vapor pipe and is communicated with external alkali lye absorption bottle, and alkali lye bottle absorption bottle is connected with gas meter; Hypoxic/anaerobic UASB internal recycle outlet valve is communicated with the bottom water-in by hypoxic/anaerobic UASB internal recycle water pipe, and hypoxic/anaerobic UASB rising pipe is communicated with intermediate water tank; The sbr reactor device is communicated with intermediate water tank by the SBR water inlet pipe, is provided with air-diffuser and mechanical stirring device in the sbr reactor device; The sbr reactor device leads to logical by SBR nitrification liquid return line and SBR nitrification liquid recirculating zone.
2. application rights requires 1 described device to carry out the method for hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrificaion, it is characterized in that, may further comprise the steps:
(1) percolate is from the SBR nitrification liquid supernatant liquor of integrated water tank by hypoxic/anaerobic UASB percolate intake pump and backflow; The percolate intake pump compares 3:1 with the SBR nitrification liquid supernatant liquor backflow volume of backflow; Be pumped to hypoxic/anaerobic UASB reactor together by hypoxic/anaerobic UASB nitrification liquid intake pump, denitrifying bacteria in the reactor and anaerobic methanogens make full use of into abundant organism in the water, carry out anoxic denitrification and anaerobism and produce methane reaction, organic carbon source abundant in the denitrifying bacteria utilization water inlet is with the NO in the SBR nitrification liquid recirculation water
2 --N is reduced to N
2, finish the removal of nitrogen; Methanogen becomes CH with oxidation operation in the above-mentioned hypoxic/anaerobic UASB reactor simultaneously
4, H
2O and CO
2Thereby, realize organic removal;
(2) water outlet of hypoxic/anaerobic UASB reactor relies on run by gravity to intermediate water tank;
(3) water in the intermediate water tank is by the effect of SBR intake pump, enter the sbr reactor device, after water inlet is finished, open air compressor, air provides respiration needed oxygen by flue, gas meter and air-diffuser to the microorganism of sbr reactor device, at first under the respiration of heterotrophic bacterium, but the degree of depth is removed remaining organism in the water, and the autotrophy nitrifier is with NH simultaneously
4 +-N is an electron donor, and oxygen is electron acceptor(EA), with NH
4 +-N is oxidized to NO
2 --N has realized the removal of ammonia nitrogen,
(4) during the nitrated end of above-mentioned sbr reactor device, behind the quiescent setting 30～60 minutes, start SBR nitrification liquid reflux pump, nitrification liquid is back to SBR nitrification liquid recirculating zone by SBR nitrification liquid return line, enters hypoxic/anaerobic UASB reactor by means of hypoxic/anaerobic UASB nitrification liquid intake pump then and carry out denitrification;
(5) above-mentioned SBR nitrification liquid refluxes when finishing, and adds carbon source as electron donor in reactor, makes COD/NO
2 --N is controlled at 3.5, starts mechanical stirring device, with the electron acceptor(EA) NO in the mixed solution
2 -The intact nitrogen N that is reduced into of-N
2Thereby, finished the nitrogen degree of depth and removed;
(6) after above-mentioned SBR denitrification is finished, stop mechanical stirring device, make the interior muddy water mixed solution quiescent setting of sbr reactor device 30～60 minutes, carry out mud-water separation, supernatant liquor is directly discharged by the SBR water discharge valve.
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| CN102515440A (en) * | 2011-12-23 | 2012-06-27 | 北京工业大学 | Device and method for conducting depth denitrification treatment on landfill leachate |
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|---|---|---|---|---|
| CN102515440A (en) * | 2011-12-23 | 2012-06-27 | 北京工业大学 | Device and method for conducting depth denitrification treatment on landfill leachate |
| CN102531284A (en) * | 2011-12-30 | 2012-07-04 | 无锡惠联垃圾热电有限公司 | Technology for treating rubbish percolate |
| CN102531284B (en) * | 2011-12-30 | 2013-07-03 | 无锡惠联垃圾热电有限公司 | Technology for treating rubbish percolate |
| CN102583885A (en) * | 2012-02-16 | 2012-07-18 | 北京工业大学 | Technology and method for treating urban sewage by three-section short-cut nitrification/ anaerobic ammonia oxidation |
| CN102583885B (en) * | 2012-02-16 | 2013-10-23 | 北京工业大学 | Technology and method for treating urban sewage by three-section short-cut nitrification/ anaerobic ammonia oxidation |
| CN104891732A (en) * | 2015-05-08 | 2015-09-09 | 华南理工大学 | System and method for treating wastewater of epidemic animal remains |
| CN107867756A (en) * | 2017-11-02 | 2018-04-03 | 中国科学院大学 | The experimental rig and control method of SBR Prepositive denitrifications/Anammox |
| CN110526390A (en) * | 2019-09-16 | 2019-12-03 | 杭州金溢建设集团有限公司 | Sewage water intensification denitrification system and its control method |
| CN114409056A (en) * | 2021-12-20 | 2022-04-29 | 徐州水处理研究所 | A/SBR + EM-based muddy water treatment method |
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| CN101423296B (en) | 2012-11-21 |
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