CN202968317U - Composite biological membrane autotrophic nitrogen removal device - Google Patents
Composite biological membrane autotrophic nitrogen removal device Download PDFInfo
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- CN202968317U CN202968317U CN 201220664887 CN201220664887U CN202968317U CN 202968317 U CN202968317 U CN 202968317U CN 201220664887 CN201220664887 CN 201220664887 CN 201220664887 U CN201220664887 U CN 201220664887U CN 202968317 U CN202968317 U CN 202968317U
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Abstract
The utility model discloses a composite biological membrane autotrophic nitrogen removal device. The composite biological membrane autotrophic nitrogen removal device comprises a water inlet water tank, a hypoxia reactor, a first aerobic reactor, a second aerobic reactor, a third aerobic reactor, a fourth aerobic reactor and a sedimentation tank, wherein inlet water of the water inlet water tank is communicated with digested sludge dehydrated liquid of a municipal sewage treatment plant; the outlet water is communicated with the hypoxia reactor; a sludge discharge pipe and a valve are arranged on the bottom of the sedimentation tank, so that the sedimentation tank is communicated with the hypoxia reactor through a sludge reflux pump; a stirrer is arranged in the hypoxia reactor; fixed filler and an aeration head which is communicated with an air compressor are arranged in the first aerobic reactor, the second aerobic reactor, the third aerobic reactor and the fourth aerobic reactor; and a clear water overflow port is formed in the sedimentation tank. The composite biological membrane autotrophic nitrogen removal device disclosed by the utility model is applicable to the nitrogen removal of high-ammonia-nitrogen sludge dehydrated liquid in the sewage treatment, perfect in structure, simple to operate, good in nitrogen removal effect and low in energy consumption.
Description
Technical field
The utility model belongs to the biochemical process technical field of sewage, specifically a kind of device that utilizes microbial film whole process autotrophic denitrification technical finesse high ammonia-nitrogen wastewater.This installs take fixing filler as carrier enrichment anaerobic ammonia oxidizing bacteria, and organic collaborative by ammonia oxidation bacteria and anaerobic ammonia oxidizing bacteria realized economical and efficient ground denitrogenation.This technique is applicable to municipal sewage plant's high ammonia nitrogen digested sludge dehydration liquid and processes, and also is applicable to the Industrial Wastewater Treatment of high ammonia nitrogen, low ratio of carbon to ammonium.
Background technology
The removal of nitrogen pollutant has become the key issue of sewage disposal and regeneration." the urban wastewater treatment firm pollutant emission standard " that China 2002 promulgates require in (GB18918-2002) all pollutant discharging unit's effluent qualities be ammonia nitrogen less than 5mg/L, total nitrogen is less than 15mg/L.In " 12 " the national economic and social development planning outline, clearly propose TAN and reduce discharging 10% target.As newly-increased the binding indicator, the system that ammonia nitrogen reduces discharging and measure all need to explore in practice.
Nitrated-the denitrification process of the general employing of traditional bio-denitrification technology is oxidized to nitric nitrogen by nitrifier with ammonia nitrogen, and then denitrifying bacteria utilizes organism that nitrate-nitrogen reduction is become nitrogen.Tradition denitrification process complicated operation, running cost is higher.For the problem that exists in traditional denitrification process, the scientific research personnel develops the biological denitrification process of various new, comprises Anammox technology in widespread attention.This technology utilizes the special pathways metabolism of anaerobic ammonia oxidizing bacteria to complete denitrogenation.This bacterium can utilize nitrite directly ammonia nitrogen to be oxidized to nitrogen as electron donor.The Anammox technology is compared with traditional denitrification process has obvious advantage: anaerobic ammonia oxidizing bacteria is chemoautotrophic bacteria, as carbon source, so need not organic carbon source in denitrification process with inorganic carbon; Nitrifying process only needs the ammonia nitrogen with 50% to be oxidizing to nitrite, and oxygen requirement and oxygen supply energy consumption decline to a great extent; The nitric efficiency of Anammox and removal load are higher, and excess sludge production is few simultaneously.The Anammox technology is applied to can save working cost in the high ammonia-nitrogen wastewater processing, produces significant economic benefit.Anaerobic ammonia oxidation process is compared the discharging that can reduce the greenhouse gases Nitrous Oxide with traditional technology simultaneously, and environmental benefit is obvious.
Anaerobic ammonia oxidation process is the bio-denitrification technology of Sustainable development, and extensive and good prospect is arranged.But anaerobic ammonia oxidizing bacteria belongs to autotrophic bacteria, and cell yield is low, is not easy enrichment at short notice.The anaerobic ammonia oxidizing bacteria doubling time of report is taken 10 days usually at present, and is even longer.In addition reactor in the time of the initial stage mud easily run off, cause the smooth enrichment of anaerobic ammonia oxidizing bacteria more difficult.Directly carry out enrichment culture from sludge from wastewater treatment plant at present, the successful startup of Anammox engineering needs 2 years even longer time.For shortening the start time of anaerobic ammonia oxidation process, need the mud of enhanced reactor to hold the ability of staying, to promote the fast enriching of anaerobism ammonia oxygen bacterium.But adopt novel technology of biological membrane reinforcement sludge to hold the ability of staying with enrichment.Evidence is by adding filler such as PE sponge filler in system, PEG polyoxyethylene glycol filler etc. can shorten the start time of anaerobic ammonia oxidation process to a certain extent.But still there is some technical problem in present Anammox biomembrane process, affects startup and the steady running of anaerobic ammonia oxidation process, comprising: 1. need larger aeration rate to keep suspension or the fluidized state of filler, thereby realize good mass transfer.The dissolved oxygen that is difficult to keep reduction in the situation that aeration rate increases, and high-solubility oxygen has certain restraining effect to anaerobic ammonia oxidizing bacteria.2. biofilm system generally is in the state that mixes fully, and intrasystem ammonia nitrogen concentration is lower, lacks to keep the favourable condition of stablizing short distance nitration; Nitrous acid oxidation bacterium enrichment gradually in this situation, thus make the nitrate in water outlet increase, reduce the nitrogen removal rate of system.
To sum up, processing at present applying of high ammonia-nitrogen wastewater needs the problem of solution to comprise: how effectively to hold in reactor and stay and the enrichment anaerobic ammonia oxidizing bacteria; How thereby the mutual ratio of concerted reaction device different strain improves the stability of reaction operation; How to reduce the complexity of system's running maintenance.Therefore, need to propose a kind of novel anaerobic ammonia oxidation process that utilizes and process the apparatus and method of high ammonia-nitrogen wastewater.
The utility model content
The utility model is in order to solve the problems of the technologies described above, a kind of device of combined biological film autotrophic denitrification is proposed, use Anammox composite biological film art breading high ammonia-nitrogen wastewater, this application of installation new packing and suspension active sludge are effectively held and are stayed the enrichment anaerobic ammonia oxidizing bacteria, improve in the aeration tank holding of mud stayed ability, increase the concentration of the microorganism in the aeration tank.This kind reactor forms different superiority bacteria spps on suspended sludge and microbial film, thereby the advantage of activated sludge process and biomembrance process is organically combined, and can significantly improve processing power and the operation stability of system.And by rational structure of reactor and hydraulic flow state for the suitable growth environment that the microorganism of difference in functionality provides, realize the quick startup of anaerobic ammonia oxidation process, and improve the nitric efficiency of system and the stability of technique.
The technical solution of the utility model is:
The device of combined biological film autotrophic denitrification is characterized in that: be provided with sequentially water tank inlet (1), anoxic reacter (3), the first aerobic reactor (4), second best oxygen reactor (5), the 3rd aerobic reactor (6), the 4th aerobic reactor (7) and the settling tank (8) in order to the digested sludge dehydration liquid that stores high-concentration ammonia-nitrogen that are communicated with; The water-in of described water tank inlet is communicated with the digested sludge of waste disposal plant dehydration liquid, and the water outlet of water tank inlet is communicated with the water-in of anoxic reacter (3) by intake pump (2); Described settling tank (8) is provided with shore pipe and valve (9), and this shore pipe also is communicated with anoxic reacter (3) through the sludge reflux pipeline by sludge reflux pump (10); Be provided with agitator (11) in anoxic reacter (3); The regular cube shape that is provided with the length of side in described first, second, third and fourth aerobic reactor and is 0.5-1.5cm is filler (15) fixedly, be equipped with the aeration head that is communicated with air compressor (12) bottom these four aerobic reactors, the aeration head of each aerobic reactor and the aerating pipelines between air compressor are provided with gas meter (14), are equipped with dissolved oxygen monitor (13) in aerobic reactor; Described settling tank top is provided with clean water overflow mouth (81).
The utility model further improves and the additional project of enforcement is:
Gas flow on described aerating pipelines is counted online gas meter, and the dissolved oxygen monitor of described aerobic reactor is online dissolved oxygen monitor, is provided with online ammonia nitrogen concentration monitor at the clean water overflow mouth place in described anoxic reacter neutralization precipitation pond; Air compressor, the sludge reflux pump of the intake pump of described anoxic reacter and agitator motor, aerobic reactor are equipped with controllable frequency converter, and be provided with the PLC controller, this PLC controller and described online dissolved oxygen monitor be connected ammonia nitrogen concentration monitor, online gas meter and carry out signal and be connected, and carry out control linkage with described intake pump and air compressor, sludge reflux pump, agitator motor.
Compare with the conventional prior aries such as Anammox denitrification treatment process with traditional high-ammonia-nitrogen sewage treatment process, the utlity model has following advantage:
1) the utility model provides suitable growth conditions by the compound bio membrane technique for different function Pseudomonas.Utilize the suspension active sludge to provide the sufficient suitable growth conditionss such as dissolved oxygen for the ammonia oxidation bacteria growth, utilize fixedly that filler provides adapt circumstance for anaerobic ammonoxidation bacterium concentrating, avoid dissolved oxygen too high in the mud flco to the restraining effect of anaerobic ammonia oxidizing bacteria.
2) pulling flow type of the present utility model is designed with the realization that is beneficial to short distance nitration and stablizes.Different with complete hybrid-type reactor, this utility model belongs to pulling flow type design, and larger ammonia nitrogen concentration gradient can be provided, and has increased mass transfer force and to the selective inhibitory of nitrous acid oxidation bacterium.Thereby the quick realization and the stable maintenance that are conducive to short distance nitration.
3) operation energy consumption of the present utility model reduces.Adopt the fixedly microbial film of filler and the technology that suspended sludge combines, aerating system only need realize that effective mixing of suspended sludge gets final product, and does not need extra energy consumption to realize suspension and the mixing of filler.This effectively reduces operation energy consumption, also is conducive to the control of low dissolved axygen and keeps simultaneously.
Description of drawings
Fig. 1 is the structural representation of the utility model device.
In Fig. 1: 1---water tank inlet; 2---intake pump; 3---anoxic reacter; 4---the first aerobic reactor; 5---second best oxygen reactor; 6---the 3rd aerobic reactor; 7---the 4th aerobic reactor; 8---settling tank; 9---control valve; 10---sludge reflux pump; 11---agitator; 12---air compressor; 13---dissolved oxygen monitor; 14---gas meter; 15---fixing filler; 81---the clean water overflow mouth.
Embodiment
Below in conjunction with drawings and embodiments, the utility model is described further: as shown in Figure 1, the device of combined biological film autotrophic denitrification is provided with sequentially water tank inlet 1, anoxic reacter 3, the first aerobic reactor 4, second best oxygen reactor 5, the 3rd aerobic reactor 6, the 4th aerobic reactor 7 and the settling tank 8 in order to the digested sludge dehydration liquid that stores high-concentration ammonia-nitrogen that are communicated with; The water-in of described water tank inlet is communicated with the digested sludge of waste disposal plant dehydration liquid, and the water outlet of water tank inlet is communicated with the water-in of anoxic reacter 3 by intake pump 2; Described settling tank 8 is provided with shore pipe and valve 9, and this shore pipe also is communicated with anoxic reacter 3 through the sludge reflux pipeline by sludge reflux pump 10; Be provided with agitator 11 in anoxic reacter 3; The regular cube shape that is provided with the length of side in described first, second, third and fourth aerobic reactor and is 0.5-1.5cm is filler 15 fixedly, be equipped with the aeration head that is communicated with air compressor 12 bottom these four aerobic reactors, aeration head and the aerating pipelines between air compressor of each aerobic reactor are provided with gas meter 14, are equipped with dissolved oxygen monitor 13 in aerobic reactor; Described settling tank top is provided with clean water overflow mouth 81.Gas flow on described aerating pipelines is counted online gas meter, and the dissolved oxygen monitor of described aerobic reactor is online dissolved oxygen monitor, is provided with online ammonia nitrogen concentration monitor at the clean water overflow mouth place in described anoxic reacter neutralization precipitation pond; Air compressor, the sludge reflux pump of the intake pump of described anoxic reacter and agitator motor, aerobic reactor are equipped with controllable frequency converter, and be provided with the PLC controller, this PLC controller and described online dissolved oxygen monitor be connected ammonia nitrogen concentration monitor, online gas meter and carry out signal and be connected, and carry out control linkage with described intake pump and air compressor, sludge reflux pump, agitator motor.
The combined biological film autotrophic denitrification device of the present embodiment arranges in certain large-scale wastewater treatment plant, is connected with sludge liquor discharge tube between the sludge dewatering of original waste disposal plant; Useful volume is 10m
3, the water inlet of use is high ammonia nitrogen sludge liquor, influent ammonium concentration 410～450mg/L, total nitrogen 450～480mg/L, COD=200～240mg/L, pH=7.4～8.2; Be stored in water tank inlet before use.
Test-results shows: the temperature of four aerobic reactors is 22～28 ℃, the water inlet total nitrogen concentration is 450～480mg/L, hydraulic detention time 20h, the average solid retention time of suspended sludge 8 days, the intrasystem fixedly filler of stable operation stage presents typical red-brown, obtains effective enrichment through molecular biology identification proof anaerobic ammonia oxidizing bacteria; The device of this embodiment is nitrated with tradition with technique-and denitrification process compares, and in the situation that do not add outer carbon source, nitrogen removal rate brings up to 70%, and total nitrogen is removed load and is reached 0.5kg/ (m
3D).And the startup of anaerobic ammonia oxidation process foreshortens to 6 months, is conducive to this technique applying in Practical Project.
Claims (2)
1. the device of a combined biological film autotrophic denitrification is characterized in that: be provided with water tank inlet (1), anoxic reacter (3), the first aerobic reactor (4), second best oxygen reactor (5), the 3rd aerobic reactor (6), the 4th aerobic reactor (7) and the settling tank (8) in order to the digested sludge dehydration liquid that stores high-concentration ammonia-nitrogen that sequentially are communicated with; The water-in of described water tank inlet is communicated with the digested sludge of sewage work dehydration liquid, and the water outlet of water tank inlet is communicated with the water-in of anoxic reacter (3) by intake pump (2); Described settling tank (8) is provided with shore pipe and valve (9), and this shore pipe also is communicated with anoxic reacter (3) through the sludge reflux pipeline by sludge reflux pump (10); Be provided with agitator (11) in anoxic reacter (3); The regular cube shape that is provided with the length of side in described first, second, third and fourth aerobic reactor and is 0.5-1.5cm is filler (15) fixedly, be equipped with the aeration head that is communicated with air compressor (12) bottom these four aerobic reactors, the aeration head of each aerobic reactor and the aerating pipelines between air compressor are provided with gas meter (14), are equipped with dissolved oxygen monitor (13) in aerobic reactor; Described settling tank top is provided with clean water overflow mouth (81).
2. the device of combined biological film autotrophic denitrification according to claim 1, it is characterized in that: the gas flow on described aerating pipelines is counted online gas meter, the dissolved oxygen monitor of described aerobic reactor is online dissolved oxygen monitor, is provided with online ammonia nitrogen concentration monitor at the clean water overflow mouth place in described anoxic reacter neutralization precipitation pond; Air compressor, the sludge reflux pump of the intake pump of described anoxic reacter and agitator motor, aerobic reactor are equipped with controllable frequency converter, and be provided with the PLC controller, this PLC controller and described online dissolved oxygen monitor be connected ammonia nitrogen concentration monitor, online gas meter and carry out signal and be connected, and carry out control linkage with described intake pump and air compressor, sludge reflux pump, agitator motor.
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| CN 201220664887 CN202968317U (en) | 2012-12-06 | 2012-12-06 | Composite biological membrane autotrophic nitrogen removal device |
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| CN 201220664887 CN202968317U (en) | 2012-12-06 | 2012-12-06 | Composite biological membrane autotrophic nitrogen removal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964035A (en) * | 2012-12-06 | 2013-03-13 | 北京城市排水集团有限责任公司 | Device for autotrophic nitrogen removal of composite biological membrane and operation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964035A (en) * | 2012-12-06 | 2013-03-13 | 北京城市排水集团有限责任公司 | Device for autotrophic nitrogen removal of composite biological membrane and operation method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20141206 |
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| EXPY | Termination of patent right or utility model |