CN103241903A - 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 PDFInfo
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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
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 handled the apparatus and method of low-carbon and nitrogen sewage, belong to technical field of sewage.
Background technology
Traditional bio-denitrifying sewage technology, most technology (typically representing as A/O technology) based on aerobic nitrification and heterotrophic denitrification exploitation.And aerobic nitrification needs sufficient aeration to keep the metabolism of aerobic ammonia-oxidizing bacteria (AOB, Ammonia oxidation bacteria) and nitrosification oxidation bacterium (NOB, Nitrite oxidation bacteria) and realize ammonia nitrogen (NH
4 +) to nitrosification attitude nitrogen (NO
2 -) and nitric nitrogen (NO
3 -) conversion; When handling the lower municipal effluent of C/N, the heterotrophic denitrification effect that need provide sufficient outer carbon source to keep denitrifying bacteria, thus realize NO
3 -And NO
2 -To nitrogen (N
2) conversion.As seen, in the traditional biological denitrification process, need 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.The Anammox bacterium utilizes NO
2 -Substitute O
2As electron acceptor(EA) with NH
4 +Be converted into N
2, need not organic carbon source, therefore to compare with the traditional biological denitrification process, Anammox technology can be saved 100% organic carbon source consumption, can save 60% aeration rate, thereby reduces direct energy consumption and the working cost of technology.In addition, discover that based on the biochemical metabolism approach to Anammox the Anammox bacterium can discharge N hardly under normal operation
2O.The N-DAMO bacterium can utilize sewage or sludge anaerobic to handle the CH that produces
4As electron donor, realize anaerobic methane oxidation and denitrification, with NO
x --N is converted into N
2The time, 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, can't satisfy the demand of denitrogenation dephosphorizing.The present invention proposes to adopt step Anammox and anaerobic methane oxidation in sewage disposal, 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 handle in organic carbon source deficiency, C/N than contradiction on the low side.
Summary of the invention
The present invention relates to a kind of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation and handle the apparatus and method of 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 handle 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:
A kind of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are handled the device of low carbon-nitrogen ratio sewage, it is characterized in that: mainly comprise anerobic sowage methane-producing reactor (1), anaerobic sludge digestion jar (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 raw waste water enter anerobic sowage methane-producing reactor (1) from the cyclone water distributor (1.2) that pump sump (5) is provided with through the bottom, anerobic sowage methane-producing reactor (1) top is provided with gas-liquid-solid three-phase separator (1.3), the collection chamber of gas-liquid-solid three-phase separator (1.4) enters with air collector (1.5) by vapor pipe and is connected, gas-liquid-solid three-phase separator top is provided with effluent trough (1.6), be connected with anaerobic methane oxidation reactor (3) with the synchronous anaerobic ammonia oxidation through going out water pump (1.7) in this effluent trough, anerobic sowage methane-producing reactor (1) bottom also is provided with sludge pump (1.8) can introduce anaerobic sludge digestion jar (2) with mud and the granule type substrate of bottom, and anerobic sowage methane-producing reactor (1) also is provided with thief hole (1.9) at different heights;
Anaerobic sludge digestion jar (2) is a right cylinder biochemical reactor, inside is provided with mechanical stirrer (2.1), anaerobic sludge digestion jar (2) also is provided with sludge digestion liquid reflux pump (2.2), the 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 jar (2) outside is provided with and adds hot jacket (2.3), and the bottom is provided with mud discharging mouth (2.4);
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) are provided with the methane inlet system, after making methane in the air collector (1.5) by methane air pump (3.1) and methane gas under meter (3.2) adjusting flow, methane aeration head (3.3) bottom synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) is incorporated in synchronous anaerobic ammonia oxidation and the anaerobic methane oxidation reactor (3) after methane is disperseed again, 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, in be provided with mechanical stirrer (3.6) and membrane module (3.7), be incorporated in the 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) also is provided with thief hole (3.10) at different heights, and 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 the intermediate water tank (3.9) can be introduced in the short distance nitration reactor (4), air-blaster (4.2) is connected with the interior air aeration head (4.4) of short distance nitration reactor (4) by air flowmeter (4.3), send into air aeration head (4.4) after making air-blaster (4.2) regulate flow with the air suction and by air flowmeter (4.3), air feeds in the short distance nitration reactor (4) after air aeration head (4.4) disperses, short distance nitration reactor (4) is connected with anaerobic methane oxidation reactor (3) with the synchronous anaerobic ammonia oxidation by nitrification liquid reflux pump (4.6), make short distance nitration reactor (4) part water outlet introduce in synchronous anaerobic ammonia oxidation and the anaerobic methane oxidation reactor (3) by nitrification liquid reflux pump (4.6), short distance nitration reactor (4) also is connected with settling tank (4.7) simultaneously, introduce in the outlet sump (6) after making another part water outlet by settling tank (4.7) mud-water separation, 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), and the bottom is provided with mud discharging mouth (4.10).
A kind of method of utilizing the ammonia oxidation of said apparatus synchronous anaerobic and anaerobic methane oxidation to handle low carbon-nitrogen ratio sewage is characterized in that may further comprise the steps:
1) will be inoculated into anerobic sowage methane-producing reactor (1) and anaerobic sludge digestion jar (2) from the anaerobically digested sludge that the municipal sewage sludge digester is obtained respectively, the sludge concentration MLSS after adding is respectively 5000-6000mg/L and 10000-15000mg/L; To cultivate the good Anammox (Anammox) of domestication and the sludge seeding of denitrification type methane anaerobic oxidation bacterium (N-DAMO) symbiosis flora in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3), the sludge concentration MLSS after adding is 3000-4000mg/L; To cultivate the good short distance nitration sludge seeding of domestication 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 the anaerobic sludge digestion jar (2) is gone into anerobic sowage methane-producing reactor (1) simultaneously, the control of anerobic sowage methane-producing reactor (1) operating temperature is at 25-30 ℃, operation pH value is 6.5-8.5, hydraulic detention time HRT is 6-12 hour, HRT is along with entering organic matter of water COD concentration increases and prolongs, when handling 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 jar (2), the operating temperature of anaerobic sludge digestion jar 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 the short distance nitration reactor (4) is introduced synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) by going out water pump and nitrification liquid reflux pump respectively, and feed synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) after the methane gas collected in the anerobic sowage methane-producing reactor air collector regulated flow by methane air pump and methane flow meter, 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, and HRT is along with influent ammonia nitrogen NH
4 +-N concentration increases and prolongs, when handling NH
4 +During the municipal effluent of-N＜50mg/L, HRT is 6-8 hour, when handling 50mg/L＜NH
4 +During the municipal effluent of-N＜100mg/L, HRT is 8-16 hour, when handling NH
4 +-N〉during the high ammonia-nitrogen wastewater of 100mg/L, HRT is 16-24 hour, sludge age SRT maintains 40-60 days;
5) synchronous anaerobic ammonia oxidation and the water outlet of anaerobic methane oxidation reactor are by introducing the short distance nitration reactor with peristaltic pump behind the 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 concentration increases and prolongs, when handling NH
4 +During the municipal effluent of-N＜50mg/L, HRT is 4-6 hour, when handling 50mg/L＜NH
4 +During the municipal effluent of-N＜100mg/L, HRT is 6-8 hour, when handling NH
4 +-N〉during the high ammonia-nitrogen wastewater of 100mg/L, HRT is 8-12 hour, and operating temperature is 25-30 ℃, and operation pH is 7.0-8.0, and dissolved oxygen DO maintains 0.4-1.0mg/L by the aeration rate of regulating air-blaster, and sludge age SRT maintains 15-20 days;
6) water outlet of short distance nitration reactor flows into outlet sump after by the settling tank mud-water separation, and the mud of settling tank bottom is back to the short distance nitration reactor through sludge reflux pump, and return sludge ratio maintains 25%-75%;
7) repeat the 2nd)-6) step.
As long as oxygen ammonia oxidation (Anammox) and denitrification type methane anaerobic oxidation bacterium (N-DAMO) the symbiosis flora cultivated after the domestication all can be realized technical scheme of the present invention.
The cultivation domestication of wherein oxygen ammonia oxidation (Anammox) and denitrification type methane anaerobic oxidation bacterium (N-DAMO) symbiosis flora also can be adopted following technical scheme:
Scheme 1: adopt elder generation's difference single culture collaborative cultured method again, the symbiosis flora of cultivation and domestication Anammox and N-DAMO bacterium, realization synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process, this method comprises following three phases:
Stage one, at first inoculation contain the Anammox bacterial classification mud to membrane biomembrane reactor (1) in, contain NH by intake pump (3) from inlet chest (2) extraction
4 +-N and NO
2 -The sewage of-N is added in the membrane biomembrane reactor (1), behind the 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 the Anammox reaction finishes, open out the supernatant liquor after hollow fiber film assembly (4) filters in water pump (5) the exhausting membrane biofilm reactor (1), and discharge unit mud control sludge age is between 40-50 days; Repeat above-mentioned culturing process, finish until the anaerobic ammonium oxidation process domestication;
Stage two, adopt another set of said apparatus, the mud in the anaerobic sludge digester and wetland bed mud mixture are inoculated in the membrane biomembrane reactor (1), extract from inlet chest (2) by intake pump (3) and only contain NO
2 -The sewage of-N is added in the membrane biomembrane reactor (1), behind the water inlet end, when 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; Anaerobic reaction is closed the methane gas under meter after finishing, and opens out the supernatant liquor after hollow fiber film assembly (4) filters in water pump (5) the exhausting membrane biofilm reactor (1), and discharge unit mud control sludge age is between 50-60 days; Repeat above-mentioned culturing process, until finishing with the domestication of denitrification anaerobic methane oxidation process;
Stage three, treat that Anammox bacterium and N-DAMO bacterium activity and quantity are stable after, the Anammox bacterium enriched microorganism that the stage one is cultivated all is inoculated in the membrane biomembrane reactor in the stage two, contains NH by intake pump (3) from inlet chest (2) extraction then
4 +-N and NO
2 -The sewage of-N, be added in the membrane biomembrane reactor (1), behind the water inlet end, when opening argon gas under meter (17), also open methane gas under meter (14), cultivate and tame the symbiosis flora of Anammox bacterium and N-DAMO bacterium, guarantee the two under anaerobic, metabolism substrate separately carries out growth and breeding respectively simultaneously; Anaerobic reaction is closed the methane gas under meter after finishing, and opens out the supernatant liquor after hollow fiber film assembly (4) filters in water pump (5) the exhausting membrane biofilm reactor (1), and discharge unit mud control sludge age is between 50-60 days; Repeat above-mentioned culturing process, finish NH in the water inlet in stage one until synchronous anaerobic ammonia oxidation and the domestication of denitrification anaerobic methane oxidation process
4 +-N and NO
2 -The control of-N concentration ratio is controlled NH in the described stage three between 1:1-1:1.5
4 +-N and NO
2 -The control of-N concentration ratio does not contain biodegradable COD in the water inlet between 1:2.5-1:4.
Scheme two: adopt first single culture N-DAMO bacterium, cultivate and tame the symbiosis flora of Anammox and N-DAMO bacterium again, realize synchronous anaerobic ammonia oxidation and denitrification anaerobic methane oxidation process, this method comprises following two stages:
Stage one is inoculated into the mixture of the mud in the anaerobic sludge digester and wetland bed mud in the membrane biomembrane reactor (1), and adopts the method that increases the nitrogen load one by one to finish denitrification anaerobic methane oxidation domestication process; In the domestication process, adopt the mode of intermittent operation, the phase is extracted from inlet chest (2) by intake pump (3) and only contains NO weekly
2 -The sewage of-N is added in the membrane biomembrane reactor (1), behind the water inlet end, when opening argon gas under meter (17) again, 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 the reaction of denitrification anaerobic methane oxidation finishes, close the methane gas under meter, open out the supernatant liquor after hollow fiber film assembly (4) filters in water pump (5) the exhausting membrane biofilm reactor (1), and discharge a small amount of mud control sludge age between 50-60 days; Repeat above-mentioned culturing process, finish until the domestication of denitrification anaerobic methane oxidation process;
In the stage two, contain NH by intake pump (3) from inlet chest (2) extraction
4 +-N and NO
2 -The sewage of-N, be added in the membrane biomembrane reactor (1), behind the water inlet end, when opening argon gas under meter (17), and unlatching methane gas under meter (14), the microorganism that cultivation and domestication stage one obtain, the symbiosis flora that namely comprises Anammox bacterium and N-DAMO bacterium, guarantee that the two under anaerobic, metabolism substrate separately carries out growth and breeding respectively simultaneously, and anaerobic reaction is closed the methane gas under meter after finishing, open out the supernatant liquor after hollow fiber film assembly (4) filters in water pump (5) the exhausting membrane biofilm reactor (1), and discharge unit mud control sludge age is between 50-60 days; Repeat above-mentioned culturing process, finish until synchronous anaerobic ammonia oxidation and the domestication of denitrification anaerobic methane oxidation process.The water inlet NH in stage two
4 +-N and NO
2 -The control of-N concentration ratio is 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 control is at 0.5-1mL/min.All adopt the mode of intermittent operation in the membrane biomembrane reactor, 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), membrane biomembrane reactor (1) inside is provided with membrane module (4), the water side of membrane module upper end is communicated with water pump (5) through pipeline, 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 the middle acid-base solution of acidic buffer bottle (9) and ealkaline buffer bottle (10) add peristaltic pump (11) through soda acid respectively and add to membrane biomembrane reactor (1), regulate the pH level in the membrane biomembrane reactor (1);
Methane gas holder (12) is connected with the gas sprinkler head (18) of methane gas under meter (14) with membrane biomembrane reactor (1) bottom through reducing valve (13), membrane biomembrane reactor (1) is connected with returnable bottle (20) via reclaiming gas meter (19), enter in the membrane biomembrane reactor (1) after making methane regulate flow, unnecessary methane enters into gas recovery bottle (20) through the recovery gas meter (19) on membrane biomembrane reactor (1) top;
Argon gas gas holder (15) is connected with the gas sprinkler head of argon gas under meter (17) with membrane biomembrane reactor (1) bottom through argon gas reducing valve (16), and the argon gas in the argon gas gas holder (15) enters into membrane biomembrane reactor (1) from gas sprinkler head (18) behind argon gas reducing valve (16) and argon gas under meter (17) adjusting flow;
Membrane biomembrane reactor (1) outside is provided with water-bath overcoat (26), and the bottom connects sludge pump (7), makes remaining mud enter excess sludge reservoir (8) through sludge pump (7);
Be provided with pH probe (21) in the membrane biomembrane reactor (1), ORP pop one's head in (22), temp probe (23) and water level gauge (20), pH pop one's head in (21), ORP pop one's head in (22), temp probe (23) is connected with automatic control system (25) by data line with water level gauge (20), with the pH that gathers, 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 controls and regulate the switch of these equipment and open size.
Compared with prior art the present invention has following characteristics and beneficial effect:
1) proposes 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 makes when handling low ratio of carbon to ammonium (refer generally to into COD is lower than 4 with ammonia nitrogen concentration ratio in the water) sewage does not need to add outer carbon source, can solve in the sewage water denitrification processing 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 so sludge yield is low, reduces the cost of sludge treatment.
3) the present invention mainly realizes the biological denitrificaion of sewage by Anammox under the anaerobic condition and N-DAMO bacterium, and the short distance nitration reactor also adopts the low dissolved axygen operation, and aeration energy consumption will be saved greatly.
4) technology of the present invention's proposition can prevent the release of greenhouse gases Nitrous Oxide, and has taken full advantage of greenhouse gases methane, is a kind of brand-new bio-denitrifying sewage new technology.
Description of drawings
Fig. 1 is apparatus structure synoptic diagram of the present invention;
Reference numeral: 1-anerobic sowage methane-producing reactor, 2-anaerobic sludge digestion jar, the ammonia oxidation of 3-synchronous anaerobic and anaerobic methane oxidation reactor, 4-short distance nitration reactor, the 5-pump sump, the 6-outlet sump, 1.1-intake pump, 1.2-cyclone water distributor, 1.3-solid-liquid gas triphase separator, 1.4-collection chamber, 1.5-air collector, 1.6-effluent trough, 1.7-go out water pump, 1.8-sludge pump, 1.9-thief hole, 2.1-mechanical stirrer, 2.2-sludge digestion liquid reflux pump, 2.3-add 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-go 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
The 1-membrane biomembrane reactor, the 2-inlet chest, the 3-intake pump, the 4-membrane module, 5-goes out water pump, the 6-water tank, the 7-sludge pump, 8-excess sludge reservoir, 9-acidic buffer bottle, 10-ealkaline buffer bottle, the 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-reclaims gas meter, 20-gas recovery bottle, the 21-pH probe, the 22-ORP probe, the 23-temp probe, the 24-water level gauge, the 25-automatic control system, 26-adds hot jacket.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
Referring to shown in Figure 1, a kind of synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are handled the device of low carbon-nitrogen ratio sewage, it is characterized in that: be provided with anerobic sowage methane-producing reactor 1, anaerobic sludge digestion jar 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, enter anerobic sowage methane-producing reactor 1 after the cyclone water distributor 1.2 that sewage is provided with through the bottom, 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, water outlet enters in synchronous anaerobic ammonia oxidation and the anaerobic methane oxidation reactor 3 through going out water pump 1.7 in this effluent trough, the bottom also is provided with sludge pump 1.8 mud and the granule type substrate of bottom is introduced anaerobic sludge digestion jar 2, and anerobic sowage methane-producing reactor 1 also is provided with thief hole 1.9 at different heights;
Anaerobic sludge digestion jar 2 is a right cylinder biochemical reactor, inside is provided with mechanical stirrer 2.1, by digestion supernatant liquor reflux pump 2.2 the sludge digestion supernatant liquor is back to anerobic sowage methane-producing reactor 1, the outside is provided with heating unit 2.3, and the bottom is provided with mud discharging mouth 2.4;
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor 3 are provided with the methane inlet system, after methane in the air collector 1.5 is regulated flow by methane air pump 3.1 and methane gas under meter 3.2, be incorporated in synchronous anaerobic ammonia oxidation and the anaerobic methane oxidation reactor 3 after by methane aeration head 3.3 methane being disperseed again, 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, in be provided with mechanical stirrer 3.6 and membrane module 3.7, be incorporated in the 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 also is provided with thief hole 3.10 at different heights, and the bottom is provided with mud discharging mouth 3.11;
Short distance nitration reactor 4 is introduced the water in the intermediate water tank 3.9 wherein by peristaltic pump 4.1, air-blaster 4.2 is sent into air aeration head 4.4 after regulating flows with the air suction and by air flowmeter 4.3, air feeds in the 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 the anaerobic methane oxidation reactor 3 by nitrification liquid reflux pump 4.6, the part water outlet is by introducing after settling tank 4.7 mud-water separation in the outlet sump 6, the mud of bottom, heavy pond, 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, and the bottom is provided with mud discharging mouth 4.10.
Utilize said apparatus to carry out the method that synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are handled low carbon-nitrogen ratio sewage, water inlet COD, ammonia nitrogen, total nitrogen (COD=160～280mg/L, NH
4 +-N=45～75mg/L, TN=50～85mg/L), pilot system is made up of anerobic sowage methane-producing reactor, anaerobic sludge digestion jar, synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, short distance nitration reactor, pump sump and outlet sump as shown in Figure 1.
Concrete operation steps is as follows:
1) will be inoculated into anerobic sowage methane-producing reactor and anaerobic sludge digestion jar respectively from the anaerobically digested sludge that the municipal sewage sludge digester is obtained, the sludge concentration MLSS after adding is respectively 5000mg/L and 12000mg/L; To cultivate the good Anammox (Anammox) of domestication and the sludge seeding of denitrification type methane anaerobic oxidation bacterium (N-DAMO) symbiosis flora in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, the sludge concentration MLSS after adding is 3000mg/L; To cultivate the good short distance nitration sludge seeding of domestication in the 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 jar kind is gone into the anerobic sowage methane-producing reactor simultaneously, the control of anerobic sowage methane-producing reactor operating temperature is at 25-30 ℃, operation pH value is 6.5-8.5, hydraulic detention time HRT is 8 hours, and HRT is along with entering organic matter of water COD concentration increases and prolongs;
3) mud of anerobic sowage methane-producing reactor bottom and granule type substrate are introduced the anaerobic sludge digestion jar, and the operating temperature of anaerobic sludge digestion jar is 35 ℃, and sludge retention time is 8 days, and the rotating speed of mechanical stirrer is set to 250rpm;
4) water outlet in the anerobic sowage methane-producing reactor effluent trough and the short distance nitration liquid in the short distance nitration reactor are introduced synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor by going out water pump and nitrification liquid reflux pump respectively, and feed synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor after the methane gas collected in the anerobic sowage methane-producing reactor air collector regulated flow by methane air pump and methane flow meter, 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, and HRT is along with influent ammonia nitrogen NH
4 +-N concentration increases and prolongs, and keeps methane concentration and NO by regulating methane flow meter and nitrification liquid reflux ratio
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 the short distance nitration reactor with peristaltic pump behind the 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 concentration increases and prolongs, and 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 of regulating air-blaster, and sludge age SRT maintains 15-20 days;
6) water outlet of short distance nitration reactor flows into outlet sump after by the settling tank mud-water separation, and the mud of settling tank bottom is back to the 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 that average carbon-nitrogen ratio is 2.8 municipal effluent processing up to standard, system's effluent quality satisfies the municipal effluent discharging standards.
The seed sludge that starts and tame is from the bed mud of the mud in the anaerobic sludge digester and a natural wetland, adopt first single culture N-DAMO bacterium progressively to tame the training strategy of Anammox bacterium again, 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.
Fs adopts and improves water inlet NO one by one
2 --N load is cultivated the 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, behind the water inlet end, feed the methane gas of 10mL/min to the SMBR reactor, and the feeding argon gas guarantees that whole reactor is in anaerobic environment, after anaerobic reaction continues 12 hours, NO in 2 hours sampling analysis SMBR reactors
2 --N concentration is when detected result shows NO
2 -When-N concentration is lower than 10mg/L, close the methane gas under meter, make aeration head in time stop the methane that exposes to the sun.Anaerobic reaction is opened out water pump after finishing, and by discharging water outlet 5L behind the tubular fibre membrane filtration, and discharging mud control sludge age was at 60 days.Repeat aforesaid operations totally 180 days, 1-40 days, water inlet NO
2 --N concentration is 50mg/L, 41-80 days, and water inlet NO
2 --N concentration is 100mg/L, 81-120 days, and water inlet NO
2 --N concentration is 120-200mg/L, finishes the cultivation of fs.
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, the artificial distribution to the SMBR reactor of 10L, behind the water inlet end, feed the methane gas of 10mL/min to the SMBR reactor, and the feeding argon gas guarantees that whole reactor is in anaerobic environment, after anaerobic reaction continues 12 hours, NO in 2 hours sampling analysis SMBR reactors
2 --N concentration is when detected result shows NO
2 -When-N concentration is lower than 10mg/L, close the methane gas under meter, make aeration head in time stop the methane that exposes to the sun.Anaerobic reaction is opened out water pump after finishing, and by discharging water outlet 5L behind the tubular fibre membrane filtration, and discharging mud control sludge age was 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, after experiencing the cultivation and enrichment Anammox bacterium and N-DAMO bacterium in above-mentioned 2 stages, relative proportion that Anammox bacterium and N-DAMO bacterium in the SMBR reactor account for full bacterium respectively is increased to more than 20% from originally less than 0.5%.
Should be pointed out that for those skilled in the art under the prerequisite that does not break away from the principle 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. a synchronous anaerobic ammonia oxidation and anaerobic methane oxidation are handled the device of low carbon-nitrogen ratio sewage, it is characterized in that: mainly comprise anerobic sowage methane-producing reactor (1), anaerobic sludge digestion jar (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 raw waste water enter anerobic sowage methane-producing reactor (1) from the cyclone water distributor (1.2) that pump sump (5) is provided with through the bottom, anerobic sowage methane-producing reactor (1) top is provided with gas-liquid-solid three-phase separator (1.3), the collection chamber of gas-liquid-solid three-phase separator (1.4) enters with air collector (1.5) by vapor pipe and is connected, gas-liquid-solid three-phase separator top is provided with effluent trough (1.6), be connected with anaerobic methane oxidation reactor (3) with the synchronous anaerobic ammonia oxidation through going out water pump (1.7) in this effluent trough, anerobic sowage methane-producing reactor (1) bottom also is provided with sludge pump (1.8) can introduce anaerobic sludge digestion jar (2) with mud and the granule type substrate of bottom, and anerobic sowage methane-producing reactor (1) also is provided with thief hole (1.9) at different heights;
Anaerobic sludge digestion jar (2) is a right cylinder biochemical reactor, inside is provided with mechanical stirrer (2.1), anaerobic sludge digestion jar (2) also is provided with sludge digestion liquid reflux pump (2.2), the 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 jar (2) outside is provided with and adds hot jacket (2.3), and the bottom is provided with mud discharging mouth (2.4);
Synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) are provided with the methane inlet system, after making methane in the air collector (1.5) by methane air pump (3.1) and methane gas under meter (3.2) adjusting flow, methane aeration head (3.3) bottom synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) is incorporated in synchronous anaerobic ammonia oxidation and the anaerobic methane oxidation reactor (3) after methane is disperseed again, 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, in be provided with mechanical stirrer (3.6) and membrane module (3.7), be incorporated in the 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) also is provided with thief hole (3.10) at different heights, and 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 the intermediate water tank (3.9) can be introduced in the short distance nitration reactor (4), air-blaster (4.2) is connected with the interior air aeration head (4.4) of short distance nitration reactor (4) by air flowmeter (4.3), send into air aeration head (4.4) after making air-blaster (4.2) regulate flow with the air suction and by air flowmeter (4.3), air feeds in the short distance nitration reactor (4) after air aeration head (4.4) disperses, short distance nitration reactor (4) is connected with anaerobic methane oxidation reactor (3) with the synchronous anaerobic ammonia oxidation by nitrification liquid reflux pump (4.6), make short distance nitration reactor (4) part water outlet introduce in synchronous anaerobic ammonia oxidation and the anaerobic methane oxidation reactor (3) by nitrification liquid reflux pump (4.6), short distance nitration reactor (4) also is connected with settling tank (4.7) simultaneously, introduce in the outlet sump (6) after making another part water outlet by settling tank (4.7) mud-water separation, 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), and the bottom is provided with mud discharging mouth (4.10).
2. one kind is utilized the device realization synchronous anaerobic ammonia oxidation of claim 1 and the method that anaerobic methane oxidation is handled low carbon-nitrogen ratio sewage, it is characterized in that may further comprise the steps:
1) will be inoculated into anerobic sowage methane-producing reactor (1) and anaerobic sludge digestion jar (2) from the anaerobically digested sludge that the municipal sewage sludge digester is obtained respectively, the sludge concentration MLSS after adding is respectively 5000-6000mg/L and 10000-15000mg/L; To cultivate the good Anammox (Anammox) of domestication and the sludge seeding of denitrification type methane anaerobic oxidation bacterium (N-DAMO) symbiosis flora in synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3), the sludge concentration MLSS after adding is 3000-4000mg/L; To cultivate the good short distance nitration sludge seeding of domestication 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 the anaerobic sludge digestion jar (2) is gone into anerobic sowage methane-producing reactor (1) simultaneously, the control of anerobic sowage methane-producing reactor (1) operating temperature is at 25-30 ℃, operation pH value is 6.5-8.5, hydraulic detention time HRT is 6-12 hour, HRT is along with entering organic matter of water COD concentration increases and prolongs, when handling 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 jar (2), the operating temperature of anaerobic sludge digestion jar 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 the short distance nitration reactor (4) is introduced synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) by going out water pump and nitrification liquid reflux pump respectively, and feed synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor (3) after the methane gas collected in the anerobic sowage methane-producing reactor air collector regulated flow by methane air pump and methane flow meter, 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, and HRT is along with influent ammonia nitrogen NH
4 +-N concentration increases and prolongs, when handling NH
4 +During the municipal effluent of-N＜50mg/L, HRT is 6-8 hour, when handling 50mg/L＜NH
4 +During the municipal effluent of-N＜100mg/L, HRT is 8-16 hour, when handling NH
4 +-N〉during the high ammonia-nitrogen wastewater of 100mg/L, HRT is 16-24 hour, sludge age SRT maintains 40-60 days;
5) synchronous anaerobic ammonia oxidation and the water outlet of anaerobic methane oxidation reactor are by introducing the short distance nitration reactor with peristaltic pump behind the 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 concentration increases and prolongs, when handling NH
4 +During the municipal effluent of-N＜50mg/L, HRT is 4-6 hour, when handling 50mg/L＜NH
4 +During the municipal effluent of-N＜100mg/L, HRT is 6-8 hour, when handling NH
4 +-N〉during the high ammonia-nitrogen wastewater of 100mg/L, HRT is 8-12 hour, and operating temperature is 25-30 ℃, and operation pH is 7.0-8.0, and dissolved oxygen DO maintains 0.4-1.0mg/L by the aeration rate of regulating air-blaster, and sludge age SRT maintains 15-20 days;
6) water outlet of short distance nitration reactor flows into outlet sump after by the settling tank mud-water separation, and the mud of settling tank bottom is back to the short distance nitration reactor through sludge reflux pump, and return sludge ratio maintains 25%-75%;
7) repeat the 2nd)-6) step.
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