CN103241903B - Device and method for treating low-carbon nitrogen sewage in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation mode - Google Patents

Device and method for treating low-carbon nitrogen sewage in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation mode Download PDF

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CN103241903B
CN103241903B CN201310192964.6A CN201310192964A CN103241903B CN 103241903 B CN103241903 B CN 103241903B CN 201310192964 A CN201310192964 A CN 201310192964A CN 103241903 B CN103241903 B CN 103241903B
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anaerobic
methane
reactor
sludge
oxidation
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CN103241903A (en
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彭永臻
郭建华
王淑莹
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Nantong Liyuan Water Industry Technology Development Co., Ltd.
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Beijing University of Technology
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Abstract

The invention discloses a device and a method for treating low-carbon nitrogen sewage in a synchronous anaerobic ammonia oxidation and anaerobic methane oxidation mode, belonging to the technical field of sewage treatment. The device mainly comprises a sewage anaerobic methanogenesis reactor, a sludge anaerobic digestion tank, a synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, a partial nitrification reactor, a water intake pool and a water outtake pool, wherein anaerobic digestion sludge is respectively inoculated to the sewage anaerobic methanogenesis reactor and the sludge anaerobic digestion tank; and cultured and domesticated anaerobic ammonia oxidation and denitrification type methane anaerobic oxidized bacterium symbiotic bacteria flora sludge is inoculated to the synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, and cultured and domesticated partial nitrification sludge is inoculated to the partial nitrification reactor, so as to carry out sewage treatment. By utilizing the device and the method, the problems that the organic carbon source is insufficient and the ratio of C to N is low in sewage denitrification treatment are solved.

Description

A kind of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are processed the apparatus and method of low-carbon and nitrogen sewage
Technical field
The present invention relates to a kind of method of anaerobic sewage biological denitrogenation, especially a kind of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are processed the apparatus and method of low-carbon and nitrogen sewage, belong to technical field of sewage.
Background technology
Traditional bio-denitrifying sewage technique, the mostly technique (typically representing as A/O technique) based on aerobic nitrification and heterotrophic denitrification exploitation.And aerobic nitrification needs sufficient aeration to maintain aerobic ammonia-oxidizing bacteria (AOB, Ammonia oxidation bacteria) and the metabolism of nitrosification oxidation bacterium (NOB, Nitrite oxidation bacteria) and realize ammonia nitrogen (NH 4 +) to nitrosification state nitrogen (NO 2 -) and nitric nitrogen (NO 3 -) conversion; In the time processing the lower municipal effluent of C/N, need to provide sufficient outer carbon source to maintain the heterotrophic denitrification effect of denitrifying bacteria, thereby realize NO 3 -and NO 2 -to nitrogen (N 2) conversion.Visible, in traditional biological denitrification process, need to expend a large amount of energy and carbon source.
The discovery of anaerobic ammonia oxidizing bacteria Anammox and denitrification type anaerobic methane oxidation bacterium N-DAMO, makes less energy-consumption, sustainable sewage disposal technology become possibility.Anammox bacterium utilizes NO 2 -substitute O 2as electron acceptor(EA) by NH 4 +be converted into N 2, without organic carbon source, therefore, compared with traditional biological denitrification process, Anammox technique can be saved 100% organic carbon source consumption, can save 60% aeration rate, thereby reduces direct energy consumption and the working cost of technique.In addition, the biochemical metabolism Study of way discovery based on to Anammox, Anammox bacterium can discharge N hardly under normal operation 2o.N-DAMO bacterium can utilize sewage or sludge anaerobic to process the CH producing 4as electron donor, realize anaerobic methane oxidation and denitrification, by NO x --N is converted into N 2time, strong greenhouse gas CH 4to be converted into CO 2.
Municipal effluent biological treatment denitrification process and dephosphorization process all need organism as carbon source, general requirement BOD/TKN>4, but China municipal effluent C/N is more on the low side than generally, cannot meet the demand of denitrogenation dephosphorizing.The present invention proposes in sewage disposal, to adopt step Anammox and anaerobic methane oxidation, can utilize the autotrophy characteristic of Anammox and N-DAMO bacterium to utilize greenhouse gases CH 4as the characteristic of denitrifying carbon source, be a kind of brand-new bio-denitrifying sewage new technology, its realization can solve sewage water denitrification process in organic carbon source deficiency, C/N than contradiction on the low side.
Summary of the invention
The present invention relates to the apparatus and method of a kind of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation lignin-sludge digestion supernatant liquor, a kind of novel sewage treatment process by anaerobic ammonia oxidizing bacteria and denitrification anaerobic methane-oxidizing bacteria has been proposed, solved sewage water denitrification process in organic carbon source deficiency, C/N than contradiction on the low side.
For achieving the above object, the present invention adopts following technical scheme:
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are processed a device for low carbon-nitrogen ratio sewage, it is characterized in that: mainly comprise anerobic sowage methane-producing reactor 1, anaerobic sludge digestion tank 2, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3, short distance nitration reactor 4, pump sump 5, outlet sump 6;
Anerobic sowage methane-producing reactor 1 is a right cylinder biochemical reactor, pump sump 5 arrange by intake pump 1.1 and anerobic sowage methane-producing reactor 1 bottom cyclone water distributor 1.2 be connected, can make the cyclone water distributor 1.2 that raw waste water is provided with through bottom from pump sump 5 enter anerobic sowage methane-producing reactor 1, anerobic sowage methane-producing reactor 1 top is provided with gas-liquid-solid three-phase separator 1.3, the collection chamber 1.4 of gas-liquid-solid three-phase separator is entered with air collector 1.5 and is connected by vapor pipe, gas-liquid-solid three-phase separator top is provided with effluent trough 1.6, in this effluent trough, be connected with synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 through going out water pump 1.7, anerobic sowage methane-producing reactor 1 bottom is also provided with sludge pump 1.8 can introduce anaerobic sludge digestion tank 2 by the mud of bottom and granule type substrate, anerobic sowage methane-producing reactor 1 is also provided with thief hole 1.9 at different heights,
Anaerobic sludge digestion tank 2 is a right cylinder biochemical reactor, inside is provided with mechanical stirrer 2.1, anaerobic sludge digestion tank 2 is also provided with sludge digestion liquid reflux pump 2.2, sludge digestion supernatant liquor can be back to anerobic sowage methane-producing reactor 1 by sludge digestion liquid reflux pump 2.2, anaerobic sludge digestion tank 2 outsides are provided with and add hot jacket 2.3, and bottom is provided with mud discharging mouth 2.4;
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 are provided with methane inlet system, methane in air collector 1.5 is passed through after methane air pump 3.1 and methane gas under meter 3.2 adjust fluxes, after methane being disperseed by the methane aeration head 3.3 of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 bottoms again, be incorporated in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3, unnecessary methane enters into methane recovery bottle 3.5 by the methane recovery pipe 3.4 on synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 tops, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 are a right cylinder reactor, inside be provided with mechanical stirrer 3.6 and membrane module 3.7, be incorporated in intermediate water tank 3.9 by going out the water outlet that water pump 3.8 can separate membrane module 3.7, anaerobic methane oxidation reactor 3 is also provided with thief hole 3.10 at different heights, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 bottoms are provided with mud discharging mouth 3.11,
Short distance nitration reactor 4 is connected with intermediate water tank 3.9 by peristaltic pump 4.1, water in intermediate water tank 3.9 can be introduced in short distance nitration reactor 4, air-blaster 4.2 is connected with the air aeration head 4.4 in short distance nitration reactor 4 by air flowmeter 4.3, make air-blaster 4.2 by air intake and by sending into air aeration head 4.4 after air flowmeter 4.3 adjust fluxes, air passes in short distance nitration reactor 4 after air aeration head 4.4 disperses, short distance nitration reactor 4 is connected with synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 by nitrification liquid reflux pump 4.6, the 4 part water outlets of short distance nitration reactor are introduced in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 by nitrification liquid reflux pump 4.6, short distance nitration reactor 4 is also connected with settling tank 4.7 simultaneously, after making another part water outlet by settling tank 4.7 mud-water separation, introduce in outlet sump 6, 4.7 bottoms, pond, heavy pond are by sludge reflux pump 4.8 and short distance nitration reactor 4, make the mud of 4.7 bottoms, pond, heavy pond be back to short distance nitration reactor 4 through sludge reflux pump 4.8, short distance nitration reactor 4 inside are provided with mechanical stirrer 4.5, top is provided with vapor pipe 4.9, bottom is provided with mud discharging mouth 4.10.
Utilize the ammonia oxidation of said apparatus synchronous anaerobic and anaerobic methane oxidation to process a method for low carbon-nitrogen ratio sewage, it is characterized in that comprising the following steps:
1) anaerobically digested sludge of obtaining from municipal sewage sludge digester is inoculated into respectively to anerobic sowage methane-producing reactor 1 and anaerobic sludge digestion tank 2, the sludge concentration MLSS after adding is respectively 5000-6000mg/L and 10000-15000mg/L; The Anammox (Anammox) that cultivation has been tamed and the sludge seeding of denitrification type methane anaerobic oxidized bacterium (N-DAMO) symbiosis flora are in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3, and the sludge concentration MLSS after adding is 3000-4000mg/L; To cultivate the short distance nitration sludge seeding of having tamed in short distance nitration reactor 4, the sludge concentration MLSS after adding is 3000-4000mg/L;
2) the digestion supernatant liquor in low carbon-nitrogen ratio sewage and anaerobic sludge digestion tank 2 enters anerobic sowage methane-producing reactor 1 simultaneously, anerobic sowage methane-producing reactor 1 operating temperature is controlled at 25-30 ℃, operation pH value is 6.5-8.5, hydraulic detention time HRT is 6-12 hour, HRT extends along with entering organic matter of water COD Enrichment, in the time processing the municipal effluent of COD<400mg/L, HRT is 6-8 hour;
3) mud of anerobic sowage methane-producing reactor 1 bottom and granule type substrate are introduced anaerobic sludge digestion tank 2, and the operating temperature of anaerobic sludge digestion tank is 35 ℃, and sludge retention time is 6-12 days, and the rotating speed of mechanical stirrer is set to 250-300rpm;
4) water outlet in anerobic sowage methane-producing reactor 1 effluent trough 1.6 and the short distance nitration liquid in short distance nitration reactor 4 are introduced to synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 by going out water pump and nitrification liquid reflux pump respectively, and the methane gas of collecting in anerobic sowage methane-producing reactor air collector is passed into synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 after by methane air pump and methane flow meter adjust flux, the operating temperature of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor is 25-30 ℃, operation pH is 7.0-8.3, hydraulic detention time HRT is 6-24h, HRT is along with influent ammonia nitrogen NH 4 +-N Enrichment and extending, when processing NH 4 +when the municipal effluent of-N<50mg/L, HRT is 6-8 hour, when processing 50mg/L<NH 4 +when the municipal effluent of-N<100mg/L, HRT is 8-16 hour, when processing NH 4 +when the high ammonia-nitrogen wastewater of-N>100mg/L, HRT is 16-24 hour, and sludge age SRT maintains 40-60 days,
5) synchronous anaerobic ammonia oxidation and the water outlet of anaerobic methane oxidation reactor are by introducing short distance nitration reactor with peristaltic pump after intermediate water tank, and the short distance nitration reactor waterpower residence time is 4-12 hour, and HRT is along with influent ammonia nitrogen NH 4 +-N Enrichment and extending, when processing NH 4 +when the municipal effluent of-N<50mg/L, HRT is 4-6 hour, when processing 50mg/L<NH 4 +when the municipal effluent of-N<100mg/L, HRT is 6-8 hour, when processing NH 4 +when the high ammonia-nitrogen wastewater of-N>100mg/L, HRT is 8-12 hour, and operating temperature is 25-30 ℃, and operation pH is 7.0-8.0, dissolved oxygen DO maintains 0.4-1.0mg/L by the aeration rate that regulates air-blaster, and sludge age SRT maintains 15-20 days;
6) water outlet of short distance nitration reactor flows into outlet sump after by settling tank mud-water separation, and the mud of settling tank bottom is back to short distance nitration reactor through sludge reflux pump, and return sludge ratio maintains 25%-75%;
7) repeat the 2nd)-6) step.
As long as anaerobic ammonium oxidation (Anammox) and denitrification type methane anaerobic oxidized bacterium (N-DAMO) the symbiosis flora cultivated after domestication all can be realized technical scheme of the present invention.
Wherein the cultivation of anaerobic ammonium oxidation (Anammox) and denitrification type methane anaerobic oxidized bacterium (N-DAMO) symbiosis flora domestication also can adopt following technical scheme:
Scheme 1: adopt first single culture collaborative method of cultivating again respectively, the symbiosis flora of cultivation and domestication Anammox and N-DAMO bacterium, realizes synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process, and the method comprises following three phases:
In the stage one, the mud that first inoculation contains Anammox bacterial classification, in membrane biomembrane reactor 1, is extracted and contains NH from inlet chest 2 by intake pump 3 4 +-N and NO 2 -the sewage of-N, is added in membrane biomembrane reactor 1, after water inlet end, only opens argon gas under meter 17 and does not open methane gas under meter 14, guarantees that anaerobic condition is so that Anammox bacterium metabolism NH 4 +-N and NO 2 --N carries out growth and breeding; After Anammox reaction finishes, open out the interior supernatant liquor after hollow fiber film assembly 4 filters of water pump 5 exhausting membrane biofilm reactors 1, and discharge unit mud control sludge age is between 40-50 days; Repeat above-mentioned culturing process, until anaerobic ammonium oxidation process has been tamed;
In the stage two, adopt another set of said apparatus, and the mud in anaerobic sludge digester and wetland bed mud mixture are inoculated in membrane biomembrane reactor 1, extracted and only contain NO from inlet chest 2 by intake pump 3 2 -the sewage of-N, is added in membrane biomembrane reactor 1, after water inlet end, in opening argon gas under meter 17, and opens methane gas under meter 14, guarantees that anaerobic condition is so that N-DAMO bacterium metabolism NO 2 --N and CH 4carry out growth and breeding; After anaerobic reaction finishes, close methane gas under meter, open out the interior supernatant liquor after hollow fiber film assembly 4 filters of water pump 5 exhausting membrane biofilm reactors 1, and discharge unit mud control sludge age is between 50-60 days; Repeat above-mentioned culturing process, until tamed with denitrification anaerobic methane oxidation process;
Stage three, until Anammox bacterium and N-DAMO bacterium activity and quantity stable after, the Anammox bacterium enriched microorganism that the stage one is cultivated is all inoculated in the membrane biomembrane reactor in the stage two, is then extracted and contains NH from inlet chest 2 by intake pump 3 4 +-N and NO 2 -the sewage of-N, be added in membrane biomembrane reactor 1, after water inlet end, in opening argon gas under meter 17, also open methane gas under meter 14, the symbiosis flora of cultivating and taming Anammox bacterium and N-DAMO bacterium, guarantees the two under anaerobic, and metabolism substrate separately carries out growth and breeding respectively simultaneously; After anaerobic reaction finishes, close methane gas under meter, open out the interior supernatant liquor after hollow fiber film assembly 4 filters of water pump 5 exhausting membrane biofilm reactors 1, and discharge unit mud control sludge age is between 50-60 days; Repeat above-mentioned culturing process, until synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process tamed, NH in the water inlet in stage one 4 +-N and NO 2 --N concentration ratio is controlled between 1:1-1:1.5, in the described stage three, controls NH 4 +-N and NO 2 --N concentration ratio is controlled between 1:2.5-1:4, does not contain biodegradable COD in water inlet.
Scheme two: adopt first single culture N-DAMO bacterium, then cultivate and tame the symbiosis flora of Anammox and N-DAMO bacterium, realize synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process, the method comprises following two stages:
In the stage one, be inoculated into the mixture of the mud in anaerobic sludge digester and wetland bed mud in membrane biomembrane reactor 1, and adopt the method that successively increases nitrogen load to complete denitrification anaerobic methane oxidation domestication process; In domestication process, adopt the mode of intermittent operation, each cycle is extracted and only contains NO from inlet chest 2 by intake pump 3 2 -the sewage of-N, is added in membrane biomembrane reactor 1, after water inlet end, then when opening argon gas under meter 17, and open methane gas under meter 14, guarantee that anaerobic condition is so that N-DAMO bacterium metabolism NO 2 --N and CH 4carry out growth and breeding, after denitrification anaerobic methane oxidation finishes, close methane gas under meter, open out the interior supernatant liquor after hollow fiber film assembly 4 filters of water pump 5 exhausting membrane biofilm reactors 1, and discharge a small amount of mud control sludge age between 50-60 days; Repeat above-mentioned culturing process, until denitrification anaerobic methane oxidation process has been tamed;
In the stage two, extract and contain NH from inlet chest 2 by intake pump 3 4 +-N and NO 2 -the sewage of-N, be added in membrane biomembrane reactor 1, after water inlet end, in opening argon gas under meter 17, and open methane gas under meter 14, the microorganism that cultivation and domestication stage one obtain, comprise the symbiosis flora of Anammox bacterium and N-DAMO bacterium, guarantee that the two under anaerobic, metabolism substrate separately carries out growth and breeding respectively simultaneously, after anaerobic reaction finishes, close methane gas under meter, open out the interior supernatant liquor after hollow fiber film assembly 4 filters of water pump 5 exhausting membrane biofilm reactors 1, and discharge unit mud control sludge age is between 50-60 days, repeat above-mentioned culturing process, until synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process have been tamed.The water inlet NH in stage two 4 +-N and NO 2 --N concentration ratio is controlled between 1:2.5-1:4.
The methane flow of above-mentioned two schemes changes with reactor size and anaerobic methane speed size, and every liter of reactor methane flow is controlled at 0.5-1mL/min.In membrane biomembrane reactor, all adopt the mode of intermittent operation, each cycle comprises into water, anaerobic reaction, precipitation, draining, 5 steps of spoil disposal.
Realize the device of above-mentioned two schemes, see Fig. 2, mainly comprise membrane biomembrane reactor 1, inlet chest 2, automatic control system 25 and water tank 6, it is characterized in that:
Described inlet chest 2 is communicated with membrane biomembrane reactor 1 through intake pump 3, and membrane biomembrane reactor 1 inside is provided with membrane module 4, and the water side of membrane module upper end goes out water pump 5 through pipeline communication, and is connected with water tank 6, makes water outlet finally enter water tank 6;
Acidic buffer bottle 9 and ealkaline buffer bottle 10 are communicated with membrane biomembrane reactor 1 through peristaltic pump 11 respectively, make in acidic buffer bottle 9 and ealkaline buffer bottle 10 acid-base solution add peristaltic pump 11 through soda acid respectively and add to membrane biomembrane reactor 1, regulate the pH level in membrane biomembrane reactor 1;
Methane gas holder 12 is connected with the gas sprinkler head 18 of membrane biomembrane reactor 1 bottom with methane gas under meter 14 through reducing valve 13, membrane biomembrane reactor 1 is connected with returnable bottle 20 via gas recovery under meter 19, make to enter in membrane biomembrane reactor 1 after methane adjust flux, unnecessary methane enters into gas recovery bottle 20 through the gas recovery under meter 19 on membrane biomembrane reactor 1 top;
Argon gas gas holder 15 is connected with the gas sprinkler head of membrane biomembrane reactor 1 bottom with argon gas under meter 17 through argon gas reducing valve 16, and the argon gas in argon gas gas holder 15 enters into membrane biomembrane reactor 1 from gas sprinkler head 18 after argon gas reducing valve 16 and argon gas under meter 17 adjust fluxes;
Membrane biomembrane reactor 1 outside is provided with water-bath overcoat 26, and bottom connects sludge pump 7, makes remaining mud enter excess sludge reservoir 8 through sludge pump 7;
In membrane biomembrane reactor 1, be provided with pH probe 21, ORP probe 22, temp probe 23 and water level gauge 20, pH probe 21, ORP probe 22, temp probe 23 is connected with automatic control system 25 by data line with water level gauge 20, by the pH gathering, ORP, temperature and waterlevel data are sent to the signal input part of automatic control system 25 by data line, the signal output part of described automatic control system 25 and intake pump 3, go out water pump 5, soda acid adds peristaltic pump 9, sludge pump 10, methane gas under meter 14 is connected with the trip switch of argon gas under meter 17, and control and regulate the switch of these equipment and open size.
Compared with prior art the present invention has following characteristics and beneficial effect:
1) propose in sewage disposal, to adopt anaerobic methane oxidation, can utilize greenhouse gases CH 4as denitrifying carbon source, it is a kind of brand-new bio-denitrifying sewage new technology, its realization does not need to add outer carbon source while making to process low ratio of carbon to ammonium (referring generally to into COD in water and ammonia nitrogen concentration ratio lower than 4) sewage, can solve sewage water denitrification process in organic carbon source deficiency, C/N than contradiction on the low side.
2) the present invention mainly utilizes Anammox and N-DAMO bacterium, and the two poor growth, therefore sludge yield is low, reduces the cost of sludge treatment.
3) the present invention mainly realizes the biological denitrificaion of sewage by Anammox under anaerobic condition and N-DAMO bacterium, and short distance nitration reactor also adopts low dissolved axygen operation, and aeration energy consumption will be saved greatly.
4) technology that the present invention proposes can prevent the release of greenhouse gases Nitrous Oxide, and takes full advantage of greenhouse gases methane, is a kind of brand-new bio-denitrifying sewage new technology.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present invention;
Reference numeral: 1-anerobic sowage methane-producing reactor, 2-anaerobic sludge digestion tank, the ammonia oxidation of 3-synchronous anaerobic and anaerobic methane oxidation reactor, 4-short distance nitration reactor, 5-pump sump, 6-outlet sump, 1.1-intake pump, 1.2-cyclone water distributor, 1.3-solid-liquid-gas three-phase separator, 1.4-collection chamber, 1.5-air collector, 1.6-effluent trough, 1.7-goes out water pump, 1.8-sludge pump, 1.9-thief hole, 2.1-mechanical stirrer, 2.2-sludge digestion liquid reflux pump, 2.3-adds hot jacket, 2.4-mud discharging mouth, 3.1-methane air pump, 3.2-methane gas under meter, 3.3-methane aeration head, 3.4-methane recovery pipe, 3.5-methane recovery bottle, 3.6-mechanical stirrer, 3.7-membrane module, 3.8-goes out water pump, 3.9-intermediate water tank, 3.10-thief hole, 3.11-mud discharging mouth, 4.1-peristaltic pump, 4.2-air-blaster, 4.3-air flowmeter, 4.4-air aeration head, 4.5-mechanical stirrer, 4.6-nitrification liquid reflux pump, 4.7-settling tank, 4.8-sludge reflux pump, 4.9-vapor pipe, 4.10-mud discharging mouth.
The device of Fig. 2 enrichment Anammox and N-DAMO bacterium symbiosis flora
1-membrane biomembrane reactor, 2-inlet chest, 3-intake pump, 4-membrane module, 5-goes out water pump, 6-water tank, 7-sludge pump, 8-excess sludge reservoir, 9-acidic buffer bottle, 10-ealkaline buffer bottle, 11-soda acid adds peristaltic pump, 12-methane gas holder, 13-methane reducing valve, 14-methane gas under meter, 15-argon gas gas holder, 16-argon gas reducing valve, 17-argon gas under meter, 18-gas sprinkler head, 19-gas recovery under meter, 20-gas recovery bottle, 21-pH probe, 22-ORP probe, 23-temp probe, 24-water level gauge, 25-automatic control system, 26-adds hot jacket.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
Embodiment 1
Shown in Figure 1, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are processed a device for low carbon-nitrogen ratio sewage, it is characterized in that: be provided with anerobic sowage methane-producing reactor 1, anaerobic sludge digestion tank 2, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3, short distance nitration reactor 4, pump sump 5, outlet sump 6;
Anerobic sowage methane-producing reactor 1 is a right cylinder biochemical reactor, intake pump 1.1 extracts raw waste water from pump sump 5, after the cyclone water distributor 1.2 that sewage is provided with through bottom, enter anerobic sowage methane-producing reactor 1, top is provided with gas-liquid-solid three-phase separator 1.3, the collection chamber 1.4 of gas-liquid-solid three-phase separator enters into air collector 1.5 by vapor pipe, gas-liquid-solid three-phase separator top is provided with effluent trough 1.6, in this effluent trough, water outlet enters in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 through going out water pump 1.7, bottom is also provided with sludge pump 1.8 mud of bottom and granule type substrate is introduced to anaerobic sludge digestion tank 2, anerobic sowage methane-producing reactor 1 is also provided with thief hole 1.9 at different heights,
Anaerobic sludge digestion tank 2 is a right cylinder biochemical reactor, inside is provided with mechanical stirrer 2.1, by digestion supernatant liquor reflux pump 2.2, sludge digestion supernatant liquor is back to anerobic sowage methane-producing reactor 1, outside is provided with heating unit 2.3, and bottom is provided with mud discharging mouth 2.4;
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 are provided with methane inlet system, methane in air collector 1.5 passes through after methane air pump 3.1 and methane gas under meter 3.2 adjust fluxes, after methane being disperseed by methane aeration head 3.3 again, be incorporated in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3, unnecessary methane enters into methane recovery bottle 3.5 by methane recovery pipe 3.4, anaerobic methane oxidation reactor 3 is a right cylinder biochemical reactor, inside be provided with mechanical stirrer 3.6 and membrane module 3.7, be incorporated in intermediate water tank 3.9 by going out the water outlet that water pump 3.8 separates membrane module 3.7, anaerobic methane oxidation reactor 3 is also provided with thief hole 3.10 at different heights, bottom is provided with mud discharging mouth 3.11,
Short distance nitration reactor 4 is introduced the water in intermediate water tank 3.9 wherein by peristaltic pump 4.1, air-blaster 4.2 is by air intake and by sending into air aeration head 4.4 after air flowmeter 4.3 adjust fluxes, air passes in short distance nitration reactor 4 after air aeration head 4.4 disperses, the 4 part water outlets of short distance nitration reactor are introduced in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 by nitrification liquid reflux pump 4.6, part water outlet is introduced in outlet sump 6 after by settling tank 4.7 mud-water separation, the mud of bottom, pond, heavy pond is back to short distance nitration reactor 4 through sludge reflux pump 4.8, short distance nitration reactor 4 inside are provided with mechanical stirrer 4.5, top is provided with vapor pipe 4.9, bottom is provided with mud discharging mouth 4.10.
Embodiment 2
Utilize said apparatus to carry out synchronous anaerobic ammonia oxidation and anaerobic methane oxidation to process the method for low carbon-nitrogen ratio sewage, influent COD, ammonia nitrogen, total nitrogen (COD=160~280mg/L, NH 4 +-N=45~75mg/L, TN=50~85mg/L), pilot system as shown in Figure 1, is made up of anerobic sowage methane-producing reactor, anaerobic sludge digestion tank, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, short distance nitration reactor, pump sump and outlet sump.
Concrete operation steps is as follows:
1) anaerobically digested sludge of obtaining from municipal sewage sludge digester is inoculated into respectively to anerobic sowage methane-producing reactor and anaerobic sludge digestion tank, the sludge concentration MLSS after adding is respectively 5000mg/L and 12000mg/L; The Anammox (Anammox) that cultivation has been tamed and the sludge seeding of denitrification type methane anaerobic oxidized bacterium (N-DAMO) symbiosis flora are in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, and the sludge concentration MLSS after adding is 3000mg/L; To cultivate the short distance nitration sludge seeding of having tamed in short distance nitration reactor, the sludge concentration MLSS after adding is 3500mg/L;
2) the digestion supernatant liquor of low carbon-nitrogen ratio sewage and anaerobic sludge digestion tank kind enters anerobic sowage methane-producing reactor simultaneously, anerobic sowage methane-producing reactor operating temperature is controlled at 25-30 ℃, operation pH value is 6.5-8.5, hydraulic detention time HRT is 8 hours, and HRT extends along with entering organic matter of water COD Enrichment;
3) mud of anerobic sowage methane-producing reactor bottom and granule type substrate are introduced anaerobic sludge digestion tank, and the operating temperature of anaerobic sludge digestion tank is 35 ℃, and sludge retention time is 8 days, and the rotating speed of mechanical stirrer is set to 250rpm;
4) the short distance nitration liquid in the water outlet in anerobic sowage methane-producing reactor effluent trough and short distance nitration reactor is introduced to synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor by going out water pump and nitrification liquid reflux pump respectively, and the methane gas of collecting in anerobic sowage methane-producing reactor air collector is passed into synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor after by methane air pump and methane flow meter adjust flux, the operating temperature of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor is 25-30 ℃, operation pH is 7.0-8.3, hydraulic detention time is 8 hours, HRT is along with influent ammonia nitrogen NH 4 +-N Enrichment and extending, by regulating methane flow meter and nitrification liquid reflux ratio to maintain methane concentration and NO 2 --N concentration ratio is 3:8, NH 4 +-N concentration and NO 2 --N concentration ratio is 1:1.3, and sludge age SRT maintains 40-60 days,
5) synchronous anaerobic ammonia oxidation and the water outlet of anaerobic methane oxidation reactor are by introducing short distance nitration reactor with peristaltic pump after intermediate water tank, and the short distance nitration reactor waterpower residence time is 5 hours, and HRT is along with influent ammonia nitrogen NH 4 +-N Enrichment and extending, operating temperature is 25-30 ℃, and operation pH is 7.0-8.0, and dissolved oxygen DO maintains 0.4-0.8mg/L by the aeration rate that regulates air-blaster, and sludge age SRT maintains 15-20 days;
6) water outlet of short distance nitration reactor flows into outlet sump after by settling tank mud-water separation, and the mud of settling tank bottom is back to short distance nitration reactor through sludge reflux pump, and return sludge ratio maintains 50%;
Repeat the 2nd)-6) step.
Do not add any carbon source, realize average carbon-nitrogen ratio and be 2.8 municipal effluent processing up to standard, system effluent quality meets municipal effluent discharging standards.
The seed sludge starting and tame is from the bed mud of the mud in anaerobic sludge digester and a natural wetland, adopt first single culture N-DAMO bacterium progressively to tame again the training strategy of Anammox bacterium, cultivate and tame the symbiosis flora of Anammox and N-DAMO bacterium, realize synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process, implementation procedure is divided into following 2 stages.
First stage adopts successively improves water inlet NO 2 --N load is cultivated denitrification anaerobic methane-oxidizing bacteria: add NO 2 --N concentration is that the artificial distribution of 50-300mg/L is to the membrane biomembrane reactor of 10L, after water inlet end, pass into the methane gas of 10mL/min to SMBR reactor, and pass into argon gas and guarantee that whole reactor is in anaerobic environment, when anaerobic reaction continued after 12 hours, NO in 2 hours sampling analysis SMBR reactors 2 --N concentration, when detected result shows NO 2 --N concentration during lower than 10mg/L, is closed methane gas under meter, makes aeration head stop in time the methane that exposes to the sun.After anaerobic reaction finishes, open out water pump, by discharging water outlet 5L after tubular fibre membrane filtration, and discharge mud control sludge age at 60 days.Repeat aforesaid operations totally 180 days, 1-40 days, water inlet NO 2 --N concentration is 50mg/L, 41-80 days, water inlet NO 2 --N concentration is 100mg/L, 81-120 days, water inlet NO 2 --N concentration is 120-200mg/L, finishes the cultivation of first stage.
Subordinate phase changes influent quality, cultivates and tame the symbiosis flora of Anammox and N-DAMO bacterium: add NO 2 --N concentration is 120-200mg/L, NH 4 +-N concentration is 30-60mg/L, artificial distribution to the SMBR reactor of 10L, after water inlet end, pass into the methane gas of 10mL/min to SMBR reactor, and pass into argon gas and guarantee that whole reactor is in anaerobic environment, when anaerobic reaction continued after 12 hours, NO in 2 hours sampling analysis SMBR reactors 2 --N concentration, when detected result shows NO 2 --N concentration during lower than 10mg/L, is closed methane gas under meter, makes aeration head stop in time the methane that exposes to the sun.After anaerobic reaction finishes, open out water pump, by discharging water outlet 5L after tubular fibre membrane filtration, and discharge mud control sludge age at 50-60 days.Repeat aforesaid operations and amount to 120 days, finish the cultivation of subordinate phase.
Adopt treatment unit of the present invention and method, experience after the cultivation and enrichment Anammox bacterium and N-DAMO bacterium in above-mentioned 2 stages, the relative proportion that can make the interior Anammox bacterium of SMBR reactor and N-DAMO bacterium account for respectively full bacterium in 8 months is increased to more than 20% from less than 0.5% originally.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, to making some changes and improvements, these changes and improvements also should be considered as protection scope of the present invention.

Claims (2)

1. synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are processed a device for low carbon-nitrogen ratio sewage, it is characterized in that: mainly comprise anerobic sowage methane-producing reactor (1), anaerobic sludge digestion tank (2), synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3), short distance nitration reactor (4), pump sump (5), outlet sump (6);
Anerobic sowage methane-producing reactor (1) is a right cylinder biochemical reactor, pump sump (5) by the setting of intake pump (1.1) and anerobic sowage methane-producing reactor (1) bottom cyclone water distributor (1.2) be connected, can make the cyclone water distributor (1.2) that raw waste water is provided with through bottom from pump sump (5) enter anerobic sowage methane-producing reactor (1), anerobic sowage methane-producing reactor (1) top is provided with gas-liquid-solid three-phase separator (1.3), the collection chamber (1.4) of gas-liquid-solid three-phase separator is entered with air collector (1.5) and is connected by vapor pipe, gas-liquid-solid three-phase separator top is provided with effluent trough (1.6), in this effluent trough, be connected with synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) through going out water pump (1.7), anerobic sowage methane-producing reactor (1) bottom is also provided with sludge pump (1.8) can introduce anaerobic sludge digestion tank (2) by the mud of bottom and granule type substrate, anerobic sowage methane-producing reactor (1) is also provided with thief hole (1.9) at different heights,
Anaerobic sludge digestion tank (2) is a right cylinder biochemical reactor, inside is provided with mechanical stirrer (2.1), anaerobic sludge digestion tank (2) is also provided with sludge digestion liquid reflux pump (2.2), sludge digestion supernatant liquor can be back to anerobic sowage methane-producing reactor (1) by sludge digestion liquid reflux pump (2.2), anaerobic sludge digestion tank (2) outside is provided with and adds hot jacket (2.3), and bottom is provided with mud discharging mouth (2.4);
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) are provided with methane inlet system, methane in air collector (1.5) is passed through after methane air pump (3.1) and methane gas under meter (3.2) adjust flux, after methane being disperseed by the methane aeration head (3.3) of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) bottom again, be incorporated in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3), unnecessary methane enters into methane recovery bottle (3.5) by the methane recovery pipe (3.4) on synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) top, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) are a right cylinder reactor, inside be provided with mechanical stirrer (3.6) and membrane module (3.7), be incorporated in intermediate water tank (3.9) by going out the water outlet that water pump (3.8) can separate membrane module (3.7), anaerobic methane oxidation reactor (3) is also provided with thief hole (3.10) at different heights, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) bottom are provided with mud discharging mouth (3.11),
Short distance nitration reactor (4) is connected with intermediate water tank (3.9) by peristaltic pump (4.1), water in intermediate water tank (3.9) can be introduced in short distance nitration reactor (4), air-blaster (4.2) is connected with the air aeration head (4.4) in short distance nitration reactor (4) by air flowmeter (4.3), make air-blaster (4.2) by air intake and by sending into air aeration head (4.4) after air flowmeter (4.3) adjust flux, air passes in short distance nitration reactor (4) after air aeration head (4.4) disperses, short distance nitration reactor (4) is connected with synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) by nitrification liquid reflux pump (4.6), short distance nitration reactor (4) part water outlet is introduced in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) by nitrification liquid reflux pump (4.6), short distance nitration reactor (4) is also connected with settling tank (4.7) simultaneously, after making another part water outlet by settling tank (4.7) mud-water separation, introduce in outlet sump (6), heavy Chi Chi (4.7) bottom is by sludge reflux pump (4.8) and short distance nitration reactor (4), make the mud of heavy Chi Chi (4.7) bottom be back to short distance nitration reactor (4) through sludge reflux pump (4.8), short distance nitration reactor (4) inside is provided with mechanical stirrer (4.5), top is provided with vapor pipe (4.9), bottom is provided with mud discharging mouth (4.10).
2. utilize the device of claim 1 to realize a method for synchronous anaerobic ammonia oxidation and anaerobic methane oxidation processing low carbon-nitrogen ratio sewage, it is characterized in that comprising the following steps:
1) anaerobically digested sludge of obtaining from municipal sewage sludge digester is inoculated into respectively to anerobic sowage methane-producing reactor (1) and anaerobic sludge digestion tank (2), the sludge concentration MLSS after adding is respectively 5000-6000mg/L and 10000-15000mg/L; Arrive in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) cultivating Anammox (Anammox) and the sludge seeding of denitrification type methane anaerobic oxidized bacterium (N-DAMO) symbiosis flora of having tamed, the sludge concentration MLSS after adding is 3000-4000mg/L; To cultivate the short distance nitration sludge seeding of having tamed in short distance nitration reactor (4), the sludge concentration MLSS after adding is 3000-4000mg/L;
2) the digestion supernatant liquor in low carbon-nitrogen ratio sewage and anaerobic sludge digestion tank (2) enters anerobic sowage methane-producing reactor (1) simultaneously, anerobic sowage methane-producing reactor (1) operating temperature is controlled at 25-30 ℃, operation pH value is 6.5-8.5, hydraulic detention time HRT is 6-12 hour, HRT extends along with entering organic matter of water COD Enrichment, in the time processing the municipal effluent of COD<400mg/L, HRT is 6-8 hour;
3) mud of anerobic sowage methane-producing reactor (1) bottom and granule type substrate are introduced anaerobic sludge digestion tank (2), the operating temperature of anaerobic sludge digestion tank is 35 ℃, sludge retention time is 6-12 days, and the rotating speed of mechanical stirrer is set to 250-300rpm;
4) the short distance nitration liquid in the water outlet in anerobic sowage methane-producing reactor (1) effluent trough (1.6) and short distance nitration reactor (4) is introduced to synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) by going out water pump and nitrification liquid reflux pump respectively, and the methane gas of collecting in anerobic sowage methane-producing reactor air collector is passed into synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) after by methane air pump and methane flow meter adjust flux, the operating temperature of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor is 25-30 ℃, operation pH is 7.0-8.3, hydraulic detention time HRT is 6-24h, HRT is along with influent ammonia nitrogen NH 4 +-N Enrichment and extending, when processing NH 4 +when the municipal effluent of-N<50mg/L, HRT is 6-8 hour, when processing 50mg/L<NH 4 +when the municipal effluent of-N<100mg/L, HRT is 8-16 hour, when processing NH 4 +when the high ammonia-nitrogen wastewater of-N>100mg/L, HRT is 16-24 hour, and sludge age SRT maintains 40-60 days,
5) synchronous anaerobic ammonia oxidation and the water outlet of anaerobic methane oxidation reactor are by introducing short distance nitration reactor with peristaltic pump after intermediate water tank, and the short distance nitration reactor waterpower residence time is 4-12 hour, and HRT is along with influent ammonia nitrogen NH 4 +-N Enrichment and extending, when processing NH 4 +when the municipal effluent of-N<50mg/L, HRT is 4-6 hour, when processing 50mg/L<NH 4 +when the municipal effluent of-N<100mg/L, HRT is 6-8 hour, when processing NH 4 +when the high ammonia-nitrogen wastewater of-N>100mg/L, HRT is 8-12 hour, and operating temperature is 25-30 ℃, and operation pH is 7.0-8.0, dissolved oxygen DO maintains 0.4-1.0mg/L by the aeration rate that regulates air-blaster, and sludge age SRT maintains 15-20 days;
6) water outlet of short distance nitration reactor flows into outlet sump after by settling tank mud-water separation, and the mud of settling tank bottom is back to short distance nitration reactor through sludge reflux pump, and return sludge ratio maintains 25%-75%;
7) repeat the 2nd)-6) step.
CN201310192964.6A 2013-05-22 2013-05-22 Device and method for treating low-carbon nitrogen sewage in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation mode Expired - Fee Related CN103241903B (en)

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