CN103910431A - Device and method for enhancing reduction of denitrified coupling sludge in urban sewage by using intra-sludge carbon sources by two stages of sequencing batch reactors (SBR) - Google Patents
Device and method for enhancing reduction of denitrified coupling sludge in urban sewage by using intra-sludge carbon sources by two stages of sequencing batch reactors (SBR) Download PDFInfo
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Abstract
The invention discloses a device and method for enhancing the reduction of denitrified coupling sludge in urban sewage by using intra-sludge carbon sources by two stages of sequencing batch reactors (SBR), belonging to the field of low C/N ratio(mole ratio) urban sewage treatment and excess sludge biochemical treatment. The device disclosed by the invention mainly comprises a SBR1, a SBR2 and a sequencing batch excess sludge fermentation reactor (SBRF). According to the invention, an excess sludge fermentation mixture is taken as a carbon source of SBR1 denitrification, so that biological denitrification is enhanced, and excess sludge is further reduced; deep denitrification is realized by taking excess sludge fermented liquid as a carbon source of SBR2 denitrification, so that discharged water can reach the level-A standard. According to the invention, an anaerobic biological treatment technology and an aerobic biological treatment technology are coupled so as to achieve the purposes of optimally controlling low C/N ratio (mole ratio) urban sewage treatment, saving carbon sources, improving the utilization rate of carbon sources, and reducing the yield of excess sludge. In addition, the device and method disclosed by the invention have the advantages of simple equipment, flexible operation, and the like.
Description
Technical field
The present invention relates to low C/N than the Optimized-control Technique of (mol ratio) urban sewage strengthening denitrogenation technique, belonging to municipal sewage treatment and excess sludge biochemical processing field, is a kind of apparatus and method that adopt two-stage SBR to utilize sludge internal carbon source strengthening city domestic sewage denitrogenation coupling mud decrement.
Background technology
The one-level A standard regulation of " the urban wastewater treatment firm pollutant emission standard " that China 2002 promulgates in (GB18918-2002), the nitrogen content of pollutant discharging unit's final outflow water is respectively NH
4 +-N < 5mg/L, TN < 15mg/L.But while it is generally acknowledged TN > 0.7mg/L, lake presents eutrophication, and in the time of TN > 1.3mg/L, lake presents serious rice-nutrient.Day by day strict along with emission standard, more than 95% sewage disposal plant effluent can not reach one-level A standard, faces the requirement of sewage deep denitrogenation.
In biological sewage treatment denitrification process, heterotrophic denitrifying Bacteria need to utilize organism as carbon source, reduction-oxidation state nitrogen, comprise nitric nitrogen and nitrite nitrogen, general requirement BOD/TKN > 4, but the current ubiquity water inlet of the most of municipal sewage treatment of China C/N is lower than (mol ratio), the problem of carbon source deficiency, causes water outlet TN to be difficult to up to standard.Domestic existing sewage work is often by additional carbon, and such as methyl alcohol etc. reaches good outlet effect, but this had both increased processing cost, had aggravated again excess sludge production and the CO of water factory
2discharge.On the other hand, in sewage treatment process, produce a large amount of mud.Mud is re-used as resource after treatment, make excess sludge resource utilization, can reduce like this objectionable impurities and can save again physical resources and energy resource to the impact of environment, reduce running cost.
The present invention utilizes the denitrogenation of excess sludge fermenting mixture strengthening municipal effluent, can make the macromole organic granular in mud transform to small molecules such as voltaile fatty acids, thereby utilized to improve system denitrification effect as carbon source by denitrifying bacteria, realize minimizing and the stabilization of mud simultaneously.The method is compared traditional denitrification process can save additional carbon, reduces working cost, and carries out the decrement of mud simultaneously, is the technique that meets Sustainable development rule, has larger practical significance, and application market is wide.
Summary of the invention
The present invention utilizes three sequencing batch reactors, first makes excess sludge from Primary Fermentation, and is connected with degree of depth denitrification reactor with the nitration denitrification reactor of municipal effluent, forms two-stage SBR domestic sewage treatment device.The present invention is simultaneously using excess sludge fermenting mixture as SBR
1denitrifying carbon source, has strengthened biological denitrificaion, and makes the further decrement of excess sludge; Utilize excess sludge fermentation broth as SBR
2denitrifying carbon source, realizes advanced nitrogen, and water outlet can reach one-level A standard.The present invention is coupled Anaerobic Microbiological Treatment Technology and aerobic biologic treating technique, to realize low C/N than (mol ratio) municipal sewage treatment optimal control, saves carbon source, improves utilization of carbon source rate, reduces the object of excess sludge production.In addition, this invention has the advantages such as equipment is simple, flexible operation.
The present invention is achieved through the following technical solutions:
Two-stage SBR utilizes the device of sludge internal carbon source strengthening city domestic sewage denitrogenation, it is characterized in that: the main equipment of this device comprises sequence batch (nitration denitrification reactor SBR
1(3), sequence batch (degree of depth denitrification reactor SBR
2and sequence batch (excess sludge fermentation reactor SBR (6)
f(11);
Sanitary sewage in former water tank (1) enters sequence batch (nitration denitrification reactor SBR by the first intake pump (2)
1(3), sequence batch (nitration denitrification reactor SBR
1(3) water outlet enters nitrification liquid bin (4), then enters sequence batch (degree of depth denitrification reactor SBR by the second intake pump (5)
2(6) in, sequence batch (degree of depth denitrification reactor SBR
2(6) water outlet is directly discharged; Sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) excess sludge enters storage mud tank (9) by first row dredge pump (7) and second row dredge pump (8) respectively, then adds pump (10) by excess sludge and add to sequence batch (excess sludge fermentation reactor SBR
f(11); Sequence batch (excess sludge fermentation reactor SBR
f(11) a part of excess sludge fermenting mixture in adds pump (12) by sludge fermentation mixture and adds to sequence batch (nitration denitrification reactor SBR
1(3) in, another part excess sludge fermenting mixture enters in second pond (13) by action of gravity, and second pond (13) water outlet flows in dosing tank (14), then adds pump (15) by sludge fermentation liquid and add to sequence batch (degree of depth denitrification reactor SBR
2(6); Sequence batch (nitration denitrification reactor SBR
1(3) be connected with air compressor (16), and the first rotor under meter (17), the first agitator (19) and a DO determinator (22), sequence batch (degree of depth denitrification reactor SBR are installed
2(6) be connected with air compressor (16), and the second spinner-type flowmeter (18), the second agitator (20) and the 2nd DO determinator (23), sequence batch (excess sludge fermentation reactor SBR are installed
f(11) the 3rd agitator (21) and pH determinator (24) are installed in.
Described two-stage SBR utilizes the device of sludge internal carbon source strengthening municipal effluent denitrogenation to realize the method for controlling, and its feature comprises the following steps:
Sequence batch (nitration denitrification reactor SBR
1(3) process low C/N than the sanitary sewage of (C/N mol ratio < 3), each cycle experiences water inlet, anoxia stirring, aeration, precipitation, 5 stages of draining successively, sludge concentration is at 1500-3000mg/L, and sludge age is at 10-20d, and hydraulic detention time is at 5-15h;
1. water inlet setting flooding quantity is identical with water displacement; After system starts, the sanitary sewage in former water tank (1) enters into sequence batch (nitration denitrification reactor SBR by the first intake pump (2)
1(3), in, when water inlet, open the first agitator (19);
2. after anoxia stirring water inlet, enter the anoxia stirring stage, in reactor, after upper cycle draining, remaining nitrification liquid utilizes carbon source and the sequence batch (excess sludge fermentation reactor SBR in former water
f(11) a part of excess sludge fermenting mixture in carries out denitrification, removes total nitrogen, and setting the denitrification time is 30-60min;
3. aeration is opened air compressor (16), regulates the first rotor under meter (17), to sequence batch (nitration denitrification reactor SBR
1(3) provide oxygen, remove organism, and be oxidation state nitrogen NO by the mineralized nitrogen in water inlet
x-, control DO=2.0-4.0mg/L, setting the nitrated time is 90-120min;
4. precipitate precipitate phase and complete mud-water separation, setting sedimentation time is 10-30min;
5. draining is set draining than being 0.3-0.5, and the sanitary sewage of discharge enters nitrification liquid bin (4);
Sequence batch (degree of depth denitrification reactor SBR
2(6) process the inner nitrification liquid of nitrification liquid bin (4), each cycle experiences water inlet, anoxia stirring, aeration, precipitation, 5 stages of draining successively, and sludge concentration is at 1500-3000mg/L, and sludge age is at 10-20d, and hydraulic detention time is at 3-10h;
1. water inlet setting flooding quantity is identical with water displacement; After system starts, the nitrification liquid in nitrification liquid bin (4) enters into sequence batch (degree of depth denitrification reactor SBR by the second intake pump (5)
2(6), in, when water inlet, open the second agitator (20);
2. after anoxia stirring water inlet, enter the anoxia stirring stage, the nitrification liquid in nitrification liquid bin (4) utilizes sequence batch (excess sludge fermentation reactor SBR
f(11) excess sludge fermentation broth nonnitrogenous, phosphorus that in, another part excess sludge fermenting mixture obtains after processing through precipitate and separate, dosing carries out denitrification, removes total nitrogen, and setting the denitrification time is 60-180min;
3. aeration is opened air compressor (16), regulates the second spinner-type flowmeter (18), to sequence batch (nitration denitrification reactor SBR
2(6) provide oxygen, remove excessive organism in the sludge fermentation liquid adding, control DO=2.0-4.0mg/L, setting and removing the organism time is 10-30min;
4. precipitate precipitate phase and complete mud-water separation, setting sedimentation time is 10-30min;
5. draining is set draining than being 0.3-0.5, and water outlet is directly discharged;
Sequence batch (excess sludge fermentation reactor SBR
f(11) under anaerobic environment, move, take excess sludge as fermentation substrate, sludge concentration is at 7000-10000mg/L, and sludge retention time, at 5-10d, is controlled pH at 9-11;
1. enter mud and enter mud 1 time every day, enter mud amount identical with sludge volume; After system starts, sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) excess sludge in enters storage mud tank (9) by first row dredge pump (7) and second row dredge pump (8) respectively, then adds pump (10) by excess sludge and enter sequence batch (excess sludge fermentation reactor SBR
f(11), in, when entering mud, start the 3rd agitator (21);
2. anaerobically fermenting the 3rd agitator (21) moves always, and anaerobically fermenting starts, and setting fermentation time is 5-10d;
3. spoil disposal is set spoil disposal than being 0.1-0.2, after system startup, and sequence batch (excess sludge fermentation reactor SBR
f(11) the sludge fermentation mixture in is as carbon source, and wherein a part adds pump (12) by sludge fermentation mixture and enters sequence batch (nitration denitrification reactor SBR
1(3) in; Another part enters second pond (13) by action of gravity and carries out mud-water separation, and supernatant liquid flows into dosing tank (14), regulates pH=9.0-10.0, adds MgSO
4regulating the mol ratio of magnesium ion, ammonia nitrogen and phosphorus in supernatant liquor is (1-1.8): (1-2): 1, remove nitrogen, phosphorus in excess sludge fermentation broth, then add pump (15) by sludge fermentation liquid and enter into sequence batch (degree of depth denitrification reactor SBR
2(6) in.
This invention tool has the following advantages:
1) sludge fermentation and two processes of sewage nitration denitrification are separated completely, in sludge fermentation process, strict anaerobic environment and the optimum pH controlled, is conducive to purifying and the enrichment of fermenting bacteria, puies forward high acid efficiency;
2) part sludge fermentation mixture is added to nitration denitrification reactor as carbon source, strengthened the utilization ratio to sludge fermentation mixture, further reach the object of mud decrement simultaneously;
3) adopt two-stage SBR Sewage treatment systems, realize the requirement of advanced nitrogen, water outlet can reach one-level A standard;
4) adopt sequencing batch reactor, technique main body only needs three sbr reactor devices, and each period of technique can adjust flexibly according to practical situation, the simple easily operation of operation, replicability is strong.The main body experimental installation design that need not too much reflux of invention, saving energy consumption and construction, overhead charges.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention
In figure: 1-former water tank; The 2-the first intake pump; 3-sequence batch (nitration denitrification reactor SBR
1; 4-nitrification liquid bin; The 5-the second intake pump; 6-sequence batch (degree of depth denitrification reactor SBR
2; 7-first row dredge pump; 8-second row dredge pump; 9-storage mud tank; 10-excess sludge adds pump; 11-sequence batch (excess sludge fermentation reactor SBR
f; 12-sludge fermentation mixture adds pump; 13-second pond; 14-dosing tank; 15-sludge fermentation liquid adds pump; 16-air compressor; 17-the first rotor under meter; The 18-the second spinner-type flowmeter; The 19-the first agitator; The 20-the second agitator; The 21-the three agitator; The 22-the one DO determinator; The 23-the two DO determinator; 24-pH determinator.
Embodiment
By reference to the accompanying drawings with example to the application's patent further instruction: as shown in Figure 1, the present invention includes the former water tank (1), the sequence batch (nitration denitrification reactor SBR that connect in turn of comprising connecting in turn
1(3), nitrification liquid bin (4), sequence batch (degree of depth denitrification reactor SBR
2and sequence batch (excess sludge fermentation reactor SBR (6)
f(11).The effective volume of its Central Plains water tank (1) is 15L, and casing is made up of organic plastics; The effective volume of nitrification liquid bin (4) is 10L, and casing is made up of organic plastics; Sequence batch (nitration denitrification reactor SBR
1(3) effective volume is 10L, sequence batch (degree of depth denitrification reactor SBR
2and sequence batch (excess sludge fermentation reactor SBR (6)
f(11) effective volume is 5L, is cylindrical synthetic glass cylinder.
Sanitary sewage in former water tank (1) enters sequence batch (nitration denitrification reactor SBR by the first intake pump (2)
1(3), sequence batch (nitration denitrification reactor SBR
1(3) water outlet enters nitrification liquid bin (4), then enters sequence batch (degree of depth denitrification reactor SBR by the second intake pump (5)
2(6) in, sequence batch (degree of depth denitrification reactor SBR
2(6) water outlet is directly discharged; Sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) excess sludge enters storage mud tank (9) by first row dredge pump (7) and second row dredge pump (8) respectively, then adds pump (10) by excess sludge and add to sequence batch (excess sludge fermentation reactor SBR
f(11); Sequence batch (excess sludge fermentation reactor SBR
f(11) a part of excess sludge fermenting mixture in adds pump (12) by sludge fermentation mixture and adds to sequence batch (nitration denitrification reactor SBR
1(3) in, another part excess sludge fermenting mixture enters in second pond (13) by action of gravity, and second pond (13) water outlet flows in dosing tank (14), then adds pump (15) by sludge fermentation liquid and add to sequence batch (degree of depth denitrification reactor SBR
2(6); Sequence batch (nitration denitrification reactor SBR
1(3) be connected with air compressor (16), and the first rotor under meter (17), the first agitator (19) and a DO determinator (22), sequence batch (degree of depth denitrification reactor SBR are installed
2(6) be connected with air compressor (16), and the second spinner-type flowmeter (18), the second agitator (20) and the 2nd DO determinator (23), sequence batch (excess sludge fermentation reactor SBR are installed
f(11) the 3rd agitator (21) and pH determinator (24) are installed in.
Concrete case study on implementation is as follows:
Specific experiment water is taken from the septic tank of dependents' district, Beijing, its pH=7.2-8.0, NH
4 +-N=53-75mg/L, COD=120-150mg/L, C/N mol ratio < 3.Sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) MLSS is all at 2000 ± 50mg/L; Sequence batch (nitration denitrification reactor SBR
1(3) effective volume is 10L, the each cycle 3L of all intaking, draining 3L, hydraulic detention time 10h, sequence batch (degree of depth denitrification reactor SBR
2(6) effective volume is 5L, the each cycle 1.5L of all intaking, and draining 1.5L, hydraulic detention time 5h, sludge age is 15d.Sequence batch (excess sludge fermentation reactor SBR
f(11) seed sludge is taken from the excess sludge of certain pilot scale SBR, and operating MLSS is 8000 ± 500mg/L, and effective volume is 5L, sludge retention time SRT=8d, add excess sludge 625mL every day, discharge excess sludge fermenting mixture 625mL, controlling pH value is 10 ± 0.1.
Concrete operation process is as follows:
Sequence batch (nitration denitrification reactor SBR
1(3) process low C/N than the sanitary sewage of (C/N mol ratio < 3), each cycle experiences water inlet, anoxia stirring, aeration, precipitation, 5 stages of draining successively, sludge concentration is at 2000 ± 50mg/L, and sludge age is at 15d, and hydraulic detention time is at 10h;
1. flooding quantity 3L is set in water inlet, and after system starts, the sanitary sewage in former water tank (1) enters into sequence batch (nitration denitrification reactor SBR by the first intake pump (2)
1(3), in, when water inlet, open the first agitator (19);
2. after anoxia stirring water inlet, enter the anoxia stirring stage, in reactor, after upper cycle draining, remaining nitrification liquid utilizes carbon source and the sequence batch (excess sludge fermentation reactor SBR in former water
f(11) a part of excess sludge fermenting mixture in carries out denitrification, removes total nitrogen, and setting the denitrification time is 60min;
3. aeration is opened air compressor (16), regulates the first rotor under meter (17), to sequence batch (nitration denitrification reactor SBR
1(3) provide oxygen, remove organism, and be oxidation state nitrogen NO by the mineralized nitrogen in water inlet
x-, control DO=2.0-4.0mg/L, setting the nitrated time is 120min;
4. precipitate precipitate phase and complete mud-water separation, setting sedimentation time is 30min;
5. draining setting water displacement is 3L, and the sanitary sewage of discharge enters nitrification liquid bin (4).
Sequence batch (degree of depth denitrification reactor SBR
2(6) process the inner nitrification liquid of nitrification liquid bin (4), each cycle experiences water inlet, anoxia stirring, aeration, precipitation, 5 stages of draining successively, and sludge concentration is at 2000 ± 50mg/L, and sludge age is at 15d, and hydraulic detention time is at 5h;
1. flooding quantity 1.5L is set in water inlet, and after system starts, the nitrification liquid in nitrification liquid bin (4) enters into sequence batch (degree of depth denitrification reactor SBR by the second intake pump (5)
2(6), in, when water inlet, open the second agitator (20);
2. after anoxia stirring water inlet, enter the anoxia stirring stage, the nitrification liquid in nitrification liquid bin (4) utilizes sequence batch (excess sludge fermentation reactor SBR
f(11) excess sludge fermentation broth nonnitrogenous, phosphorus that in, another part excess sludge fermenting mixture obtains after processing through precipitate and separate, dosing carries out denitrification, removes total nitrogen, and setting the denitrification time is 60min;
3. aeration is opened air compressor (16), regulates the second spinner-type flowmeter (18), to sequence batch (nitration denitrification reactor SBR
2(6) provide oxygen, remove excessive organism in the sludge fermentation liquid adding, control DO=2.0-4.0mg/L, setting and removing the organism time is 30min;
4. precipitate precipitate phase and complete mud-water separation, setting sedimentation time is 30min;
5. water displacement 1.5L is set in draining, and water outlet is directly discharged.
Sequence batch (excess sludge fermentation reactor SBR
f(11) under anaerobic environment, move, take excess sludge as fermentation substrate, sludge concentration is at 8000 ± 500mg/L, and sludge retention time is at 8d, and controlling pH value is 10 ± 0.1;
1. entering mud sets into mud amount to be 625mL, to enter mud every day 1 time.After system starts, sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) excess sludge in enters storage mud tank (9) by first row dredge pump (7) and second row dredge pump (8) respectively, then adds pump (10) by excess sludge and enter sequence batch (excess sludge fermentation reactor SBR
f(11), in, when entering mud, start the 3rd agitator (21);
2. anaerobically fermenting the 3rd agitator (21) moves always, and anaerobically fermenting starts;
3. spoil disposal setting sludge volume is 625mL, after system starts, and sequence batch (excess sludge fermentation reactor SBR
f(11) the sludge fermentation mixture in is as carbon source, and wherein a part adds pump (12) by sludge fermentation mixture and enters sequence batch (nitration denitrification reactor SBR
1(3) in; Another part enters second pond (13) by action of gravity and carries out mud-water separation, and supernatant liquid flows into dosing tank (14), regulates pH=9.5 ± 0.1, adds MgSO
4regulating the mol ratio of magnesium ion in supernatant liquor, ammonia nitrogen and phosphorus is 1.5:1.25:1, removes nitrogen, phosphorus in excess sludge fermentation broth, then adds pump (15) by sludge fermentation liquid and enter into sequence batch (degree of depth denitrification reactor SBR
2(6) in.
Utilize excess sludge fermenting mixture strengthening municipal effluent denitrogenation robot control system(RCS) and method to process low C/N described above than the real life sewage of (mol ratio), final outflow water ammonia nitrogen concentration < 1mg/L, total nitrogen concentration < 10mg/L, water outlet COD < 40mg/L, meets one-level A standard of drainage far away.Meanwhile, reach the object of excess sludge reduction, through anaerobically fermenting mud decrement 30%, through the further decrement 8% of aerobic digested sludge.
Claims (2)
1. two-stage SBR utilizes the device of sludge internal carbon source strengthening city domestic sewage denitrogenation, it is characterized in that: the main equipment of this device comprises sequence batch (nitration denitrification reactor SBR
1(3), sequence batch (degree of depth denitrification reactor SBR
2and sequence batch (excess sludge fermentation reactor SBR (6)
f(11);
Sanitary sewage in former water tank (1) enters sequence batch (nitration denitrification reactor SBR by the first intake pump (2)
1(3), sequence batch (nitration denitrification reactor SBR
1(3) water outlet enters nitrification liquid bin (4), then enters sequence batch (degree of depth denitrification reactor SBR by the second intake pump (5)
2(6) in, sequence batch (degree of depth denitrification reactor SBR
2(6) water outlet is directly discharged; Sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) excess sludge enters storage mud tank (9) by first row dredge pump (7) and second row dredge pump (8) respectively, then adds pump (10) by excess sludge and add to sequence batch (excess sludge fermentation reactor SBR
f(11); Sequence batch (excess sludge fermentation reactor SBR
f(11) a part of excess sludge fermenting mixture in adds pump (12) by sludge fermentation mixture and adds to sequence batch (nitration denitrification reactor SBR
1(3) in, another part excess sludge fermenting mixture enters in second pond (13) by action of gravity, and second pond (13) water outlet flows in dosing tank (14), then adds pump (15) by sludge fermentation liquid and add to sequence batch (degree of depth denitrification reactor SBR
2(6); Sequence batch (nitration denitrification reactor SBR
1(3) be connected with air compressor (16), and the first rotor under meter (17), the first agitator (19) and a DO determinator (22), sequence batch (degree of depth denitrification reactor SBR are installed
2(6) be connected with air compressor (16), and the second spinner-type flowmeter (18), the second agitator (20) and the 2nd DO determinator (23), sequence batch (excess sludge fermentation reactor SBR are installed
f(11) the 3rd agitator (21) and pH determinator (24) are installed in.
2. adopt two-stage SBR claimed in claim 1 to utilize the device of sludge internal carbon source strengthening municipal effluent denitrogenation to realize the method for controlling, its feature comprises the following steps:
Sequence batch (nitration denitrification reactor SBR
1(3) sanitary sewage of processing C/N mol ratio < 3, each cycle experiences water inlet, anoxia stirring, aeration, precipitation, 5 stages of draining successively, sludge concentration is at 1500-3000mg/L, and sludge age is at 10-20d, and hydraulic detention time is at 5-15h;
1. water inlet setting flooding quantity is identical with water displacement; After system starts, the sanitary sewage in former water tank (1) enters into sequence batch (nitration denitrification reactor SBR by the first intake pump (2)
1(3), in, when water inlet, open the first agitator (19);
2. after anoxia stirring water inlet, enter the anoxia stirring stage, in reactor, after upper cycle draining, remaining nitrification liquid utilizes carbon source and the sequence batch (excess sludge fermentation reactor SBR in former water
f(11) a part of excess sludge fermenting mixture in carries out denitrification, removes total nitrogen, and setting the denitrification time is 30-60min;
3. aeration is opened air compressor (16), regulates the first rotor under meter (17), to sequence batch (nitration denitrification reactor SBR
1(3) provide oxygen, remove organism, and be oxidation state nitrogen NO by the mineralized nitrogen in water inlet
x -, control DO=2.0-4.0mg/L, setting the nitrated time is 90-120min;
4. precipitate precipitate phase and complete mud-water separation, setting sedimentation time is 10-30min;
5. draining is set draining than being 0.3-0.5, and the sanitary sewage of discharge enters nitrification liquid bin (4);
Sequence batch (degree of depth denitrification reactor SBR
2(6) process the inner nitrification liquid of nitrification liquid bin (4), each cycle experiences water inlet, anoxia stirring, aeration, precipitation, 5 stages of draining successively, and sludge concentration is at 1500-3000mg/L, and sludge age is at 10-20d, and hydraulic detention time is at 3-10h;
1. water inlet setting flooding quantity is identical with water displacement; After system starts, the nitrification liquid in nitrification liquid bin (4) enters into sequence batch (degree of depth denitrification reactor SBR by the second intake pump (5)
2(6), in, when water inlet, open the second agitator (20);
2. after anoxia stirring water inlet, enter the anoxia stirring stage, the nitrification liquid in nitrification liquid bin (4) utilizes sequence batch (excess sludge fermentation reactor SBR
f(11) excess sludge fermentation broth nonnitrogenous, phosphorus that in, another part excess sludge fermenting mixture obtains after processing through precipitate and separate, dosing carries out denitrification, removes total nitrogen, and setting the denitrification time is 60-180min;
3. aeration is opened air compressor (16), regulates the second spinner-type flowmeter (18), to sequence batch (nitration denitrification reactor SBR
2(6) provide oxygen, remove excessive organism in the sludge fermentation liquid adding, control DO=2.0-4.0mg/L, setting and removing the organism time is 10-30min;
4. precipitate precipitate phase and complete mud-water separation, setting sedimentation time is 10-30min;
5. draining is set draining than being 0.3-0.5, and water outlet is directly discharged;
Sequence batch (excess sludge fermentation reactor SBR
f(11) under anaerobic environment, move, take excess sludge as fermentation substrate, sludge concentration is at 7000-10000mg/L, and sludge retention time, at 5-10d, is controlled pH at 9-11;
1. enter mud and enter mud 1 time every day, enter mud amount identical with sludge volume; After system starts, sequence batch (nitration denitrification reactor SBR
1and sequence batch (degree of depth denitrification reactor SBR (3)
2(6) excess sludge in enters storage mud tank (9) by first row dredge pump (7) and second row dredge pump (8) respectively, then adds pump (10) by excess sludge and enter sequence batch (excess sludge fermentation reactor SBR
f(11), in, when entering mud, start the 3rd agitator (21);
2. anaerobically fermenting the 3rd agitator (21) moves always, and anaerobically fermenting starts, and setting fermentation time is 5-10d;
3. spoil disposal is set spoil disposal than being 0.1-0.2, after system startup, and sequence batch (excess sludge fermentation reactor SBR
f(11) the sludge fermentation mixture in is as carbon source, and wherein a part adds pump (12) by sludge fermentation mixture and enters sequence batch (nitration denitrification reactor SBR
1(3) in; Another part enters second pond (13) by action of gravity and carries out mud-water separation, and supernatant liquid flows into dosing tank (14), regulates pH=9.0-10.0, adds MgSO
4regulating the mol ratio of magnesium ion, ammonia nitrogen and phosphorus in supernatant liquor is (1-1.8): (1-2): 1, remove nitrogen, phosphorus in excess sludge fermentation broth, then add pump (15) by sludge fermentation liquid and enter into sequence batch (degree of depth denitrification reactor SBR
2(6) in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410133393.3A CN103910431B (en) | 2014-04-03 | 2014-04-03 | Two-stage SBR utilizes sludge internal carbon source to strengthen the apparatus and method of city domestic sewage denitrogenation coupling mud decrement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410133393.3A CN103910431B (en) | 2014-04-03 | 2014-04-03 | Two-stage SBR utilizes sludge internal carbon source to strengthen the apparatus and method of city domestic sewage denitrogenation coupling mud decrement |
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| Publication Number | Publication Date |
|---|---|
| CN103910431A true CN103910431A (en) | 2014-07-09 |
| CN103910431B CN103910431B (en) | 2015-10-14 |
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ID=51036487
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| CN104498352A (en) * | 2014-11-17 | 2015-04-08 | 北京工业大学 | Apparatus and method for producing acetic acid through alkaline fermentation of residual sludge which is reinforced by pretreatment of strong base |
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| CN104402181A (en) * | 2014-11-17 | 2015-03-11 | 北京工业大学 | Device and method for residual sludge fermentation coupled AO biological denitrogenation |
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