CN102774958B - Sewage and sludge treatment method for achieving good biological phosphorus removal and improving acid production of sludge - Google Patents
Sewage and sludge treatment method for achieving good biological phosphorus removal and improving acid production of sludge Download PDFInfo
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- CN102774958B CN102774958B CN201210285691.5A CN201210285691A CN102774958B CN 102774958 B CN102774958 B CN 102774958B CN 201210285691 A CN201210285691 A CN 201210285691A CN 102774958 B CN102774958 B CN 102774958B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The invention relates to a sewage and sludge treatment method for achieving good biological phosphorus removal and improving acid production of the sludge. An ordinary sequencing batch reactor is adopted to treat the sewage, and an alkaline fermentation pool is utilized to ferment excess sludge generated in the sewage treatment process. The sewage and sludge treatment method particularly comprises enabling the sewage to enter the sequencing batch reactor, and directly performing aerobic aeration on the sewage; discharging a certain amount of mud water mixture, controlling sludge age, enabling supernatant to return to the sequencing batch reactor after the mud water mixture subsides, performing aerobic aeration and subsiding on the excess sludge, and draining water; enabling the excess sludge generated in the sequencing batch reactor to enter the alkaline fermentation pool after water draining is finished; starting an agitator, starting an automatic alkali-adding device, and enabling pH in the alkaline fermentation pool to be 10+/-0.1; and performing mud water separation after 4-day fermentation. According to the sewage and sludge treatment method, physicochemical properties of the excess sludge is controlled from a source of sewage treatment, yield of organic acid in the alkaline fermentation process of the excess sludge is improved, fermentation time is shortened, an organic matter part in the sewage is removed by microorganism accumulation simultaneously, the aeration amount is reduced, and sewage treatment running cost is reduced.
Description
Technical field
The present invention relates to a kind ofly realize good biological dephosphorization and improve mud and produce sour sewage and method for sludge treatment, belong to environmental protection technical field.
Background technology
Municipal sludge is solid or the semi-solid sedimentable matter that sewage work produces in to sewage treatment process, has the features such as output is large, organic content is high, complicated component.If dealt with improperly, very easily cause secondary pollution.It is the important directions of recycling sludge that anaerobic sludge digestion produces short chain fatty acid, has caused many investigators' concern this year.
Short chain fatty acid (comprising acetic acid, propionic acid etc.) is the preferential use carbon source that in biological wastewater treatment process, denitrogenation dephosphorizing is had a preference for, the direct concentration that has determined nitrogen phosphorus in sewage treatment facility water outlet of its content.Because short chain fatty acid content of (particularly in the sewage of southern area) in China's sewage is lower, therefore, usually by ways such as additional acetic acid, guarantee high efficiency and the stability for the treatment of facility denitrogenation dephosphorizing, greatly increased running cost.
Contriver's early-stage Study shows: excess sludge can produce a large amount of short chain fatty acids (Environmental Science and Techlonogy at alkaline condition bottom fermentation, 2006,40,2025-2029), the lipid acid that fermentation is produced is during as the supplementary carbon source of Biological Phosphorus Removal Processes, the phosphor-removing effect of system can be significantly improved (Environmental Science and Techlonogy, 2007,41,7126-7130).At present, the research center of gravity of acidogenesis of waste activated sludge all concentrates on the condition optimizing of acid process and controls both at home and abroad.
Research shows, Sludge System can produce the clustering phenomena (be that in sewage, not direct oxidation of organism is carbonic acid gas and water, and absorbed in body and store by bacterium) of ergastic substances under non-equilibrium condition, and these ergastic substances all can be by fast degradation.If mud that can enrichment ergastic substances content is high in sewage treatment process and don't the processing power of impair system, can not only reduce so the running cost of sewage disposal, and can improve the acid producing ability of follow-up mud, there is important practice significance.
Recent years, has report to show that single-stage aerobic process can not set under the processing condition of anaerobism section, and Sludge System can realize good biological phosphate-eliminating by the suitable time of repose of reverse extending.The present invention is on the basis of this biological phosphate-eliminating technology, develop a kind of excess sludge that can obtain higher energy storage thing content, do not reduce again the sewage treatment process of the operating performance (particularly phosphor-removing effect) of Sewage treatment systems, and this excess sludge is carried out in alkaline fermentation pond to anaerobically fermenting, greatly improved the ability of excess sludge fermentation and acid.
Summary of the invention
The object of this invention is to provide and a kind ofly realize good biological dephosphorization and improve mud and produce sour sewage and method for sludge treatment.
What the present invention proposed realizes good biological dephosphorization and improves mud and produce sour sewage and method for sludge treatment, by sewage and sludge treating system, processed, described treatment system is by waste disposal plant and acidogenesis of waste activated sludge installation composition, described waste disposal plant is by water inlet pipe 1, rising pipe 4, shore pipe 6, sequencing batch reactor 7, aeration head 8, under meter 9 and air compressor 11 form, sequencing batch reactor 7 bottoms are provided with aeration head 8, described aeration head 8 is by pipeline connection traffic meter 9, under meter 9 connects air compressor 11 by blast main 10, sequencing batch reactor 7 bottoms connect shore pipe 6 by spoil disposal valve 5, sequencing batch reactor 7 middle parts connect rising pipe 4 by flowing water Valve 3, sequencing batch reactor 7 connects water inlet pipe 1 by inlet valve 2, described acidogenesis of waste activated sludge device is comprised of alkaline fermentation pond 12, agitator 13 and automatic alkali adding device 14, and agitator 13 and automatic alkali adding device 14 insert in alkaline fermentation pond 12, the operation method concrete steps of Sewage treatment systems are as follows:
(1), open inlet valve 2, sewage enters in sequencing batch reactor 7 from water inlet pipe 1, after water to be entered, closes inlet valve 2.
(2), open air compressor 11 aerobic aerations, the aerobic aeration time is 3.8-4.2h.
(3), when aerobic aeration 1h, open spoil disposal valve 5 and discharge a certain amount of mud mixture, making activated sludge concentration in reactor is 2800-3200 mgL
-1, mud mud age is 10-14d.After the mud mixture precipitation 0.4-0.6h discharging, supernatant liquor returns to the interior continuation aeration of sequencing batch reactor 7, and excess sludge enters alkaline fermentation pond and produces organic acid for anaerobically fermenting.
(4), after aerobic aeration finishes, close air compressor 11 and finish aerations, precipitation 0.9-1.1h, to realize mud-water separation.
(5), precipitation finish after, open flowing water Valve 3, after draining finishes, close water discharging valve 3.
(6), by the standing 6.5-7.5h of sequencing batch reactor 7, whole reaction time 12h.
(7), excess sludge enters behind alkaline fermentation pond 12, turn on agitator 13, rotating speed is 140-160 r/min.
(8), open automatic alkali adding device 14, make pH in alkaline fermentation pond 12 be controlled at 10 ± 0.1.
(9), excess sludge ferments after 4 days in alkaline fermentation pond, carries out mud-water separation, supernatant liquor is for being rich in organic acid salt.
Key point in above-mentioned operation method is to control the suitable spoil disposal time, to do not affecting under the prerequisite of wastewater treatment efficiency (particularly phosphor-removing effect), obtains to improve and produces organic acid excess sludge.Contriver passes through a large amount of research and shows, after aerobic 1h, spoil disposal can reach desirable effect.
The invention has the beneficial effects as follows:
(1) in the source of sewage disposal, control the physico-chemical property of excess sludge, improved the characteristic of organic acids produced by sludge, not only realized minimizing, the stabilization of mud, obtained more valuable product simultaneously;
(2) the organism part in sewage is removed by microbial accumulation, reduced aeration rate, reduced sewage disposal running cost.
Accompanying drawing explanation
Fig. 1 is a kind of example structure schematic diagram of the sewage-treating reactor (sequencing batch reactor) that adopts of the present invention.
Fig. 2 is a kind of example structure schematic diagram of the sludge fermentation acidogenic reactor that adopts of the present invention.
Number in the figure: 1 is water inlet pipe, 2 is inlet valve, 3 is flowing water Valve, 4 is rising pipe, and 5 is spoil disposal valve, and 6 is shore pipe, 7 is sequencing batch reactor, 8 is aeration head, and 9 is under meter, and 10 is blast main, 11 is air compressor, 12 is alkaline fermentation pond, and 13 is agitator, and 14 is automatic alkali adding device.
Embodiment
Contrast ordinary activated sludge technique excess sludge below and aerobic/anaerobic technique excess sludge fermentation and acid is that example is illustrated the present invention.
Embodiment 1:
As shown in Figure 1, waste disposal plant is common sequencing batch reactor, and as shown in Figure 2, acidogenesis of waste activated sludge device used is alkaline fermentation pond, and its operation method carries out as follows:
1, open inlet valve 2, sewage enters sequencing batch reactor main body 7 from water inlet pipe 1, after water to be entered, closes inlet valve 2.
2, after water inlet, open air compressor 11 aerobic aerations, the aerobic aeration time is 4h.
3, when aerobic aeration 1h, open spoil disposal valve 5 and discharge a certain amount of mud mixture, making activated sludge concentration in reactor is 3000 mgL
-1left and right, mud mud is about 12d age.After the mud mixture precipitation 0.5h discharging, supernatant liquor returns to the interior continuation aeration of sbr reactor device main body 7, and remaining mud is produced organic acid for anaerobically fermenting.
4, after aerobic aeration 4h, close air compressor 11 and finish aeration, precipitation 1h, to realize mud-water separation.
5, after precipitation 1h, open flowing water Valve 3, after draining finishes, close water discharging valve 3.
6, after draining finishes, the standing 7h of reactor, whole reaction time 12h.
Mud produces acid system operation method:
1, the excess sludge that Sewage treatment systems produces enters behind alkaline fermentation pond 12, turn on agitator 13, and rotating speed is 150 r/min.
2, open automatic alkali adding device 14, make pH in alkaline fermentation pond be controlled at 10 ± 0.1.
3, excess sludge fermented after 4 days in alkaline fermentation pond, carried out mud-water separation, and supernatant liquor is for being rich in organic acid salt.
By above-mentioned operation method and conventional activated sludge process, process the operating performance of city domestic sewage and the contrast of gained acidogenesis of waste activated sludge.Influent COD is 300 ~ 350 mgL
-1, TN is 30 ~ 35mgL
-1, TP is 8 ~ 10 mgL
-1.
After steady running, the contrast of sewage disposal result is as follows: above-mentioned operation method water outlet COD is 24 ~ 36mgL
-1, ammonia nitrogen is 0 ~ 3mgL
-1, TP is 0 ~ 0.92mgL
-1; Conventional activated sludge process water outlet COD is 28 ~ 40mgL
-1, ammonia nitrogen is 0 ~ 4mgL
-1, TP is 6.74 ~ 8.81mgL
-1.
Gained excess sludge all carries out anaerobically fermenting in working volume is the reactor of 600 mL.The time of fermentation is identical with control condition: pH=10 ± 0.1, and fermentation time is 4d, leavening temperature is 20 ± 1 ℃.Make organic acid result as follows: it is 301 mg COD/ g VSS that above-mentioned operation method gained mud produces sour result; It is 189 mg COD/ g VSS that conventional activated sludge process gained mud produces sour result.
Embodiment .2:
Press operation method and the operating performance of aerobic/anaerobic art breading city domestic sewage and the contrast of gained acidogenesis of waste activated sludge of embodiment 1.Influent COD is 320 ~ 350 mgL
-1, TN is 30 ~ 32mgL
-1, TP is 9 ~ 10 mgL
-1.
After steady running, the contrast of sewage disposal result is as follows: above-mentioned operation method water outlet COD is 24 ~ 32mgL
-1, ammonia nitrogen is 0 ~ 3.2mgL
-1, TP is 0 ~ 0.88mgL
-1; Aerobic/anaerobic Process for Effluent COD is 22 ~ 30mgL
-1, ammonia nitrogen is 0.26 ~ 5.68mgL
-1, TP is 0 ~ 0.79mgL
-1.
Gained excess sludge all carries out anaerobically fermenting in working volume is the reactor of 600 mL.The time of fermentation is identical with control condition: pH=10 ± 0.1, and fermentation time is 4d, leavening temperature is 20 ± 1 ℃.Make organic acid result as follows: it is 308 mg COD/ g VSS that above-mentioned operation method gained mud produces sour result; It is 156 mg COD/ g VSS that conventional activated sludge process gained mud produces sour result.
Claims (1)
1. realize good biological dephosphorization and improve mud and produce sour sewage and method for sludge treatment, it is characterized in that being processed by sewage and sludge treating system, described sewage and sludge treating system are by waste disposal plant and acidogenesis of waste activated sludge installation composition, described waste disposal plant is by water inlet pipe (1), rising pipe (4), shore pipe (6), sequencing batch reactor (7), aeration head (8), under meter (9) and air compressor (11) form, sequencing batch reactor (7) bottom is provided with aeration head (8), described aeration head (8) is by pipeline connection traffic meter (9), under meter (9) connects air compressor (11) by blast main (10), sequencing batch reactor (7) bottom connects shore pipe (6) by spoil disposal valve (5), sequencing batch reactor (7) middle part connects rising pipe (4) by flowing water Valve (3), sequencing batch reactor (7) connects water inlet pipe (1) by inlet valve (2), described acidogenesis of waste activated sludge device is comprised of alkaline fermentation pond (12), agitator (13) and automatic alkali adding device (14), and agitator (13) and automatic alkali adding device (14) insert in alkaline fermentation pond (12), the operation method concrete steps of Sewage treatment systems are as follows:
(1), open inlet valve (2), sewage enters in sequencing batch reactor (7) from water inlet pipe (1), after water to be entered, closes inlet valve (2);
(2), open air compressor (11) aerobic aeration, the aerobic aeration time is 3.8-4.2h;
(3), when aerobic aeration 1h, open spoil disposal valve (5) and discharge a certain amount of mud mixture, making activated sludge concentration in reactor is 2800-3200 mgL
-1, mud mud age is 10-14d; After the mud mixture precipitation 0.4-0.6h discharging, supernatant liquor returns in sequencing batch reactor (7) and continues aeration, and excess sludge enters alkaline fermentation pond and produces organic acid for anaerobically fermenting;
(4), after aerobic aeration finishes, close air compressor (11) and finish aeration, precipitation 0.9-1.1h, to realize mud-water separation;
(5), precipitation finish after, open flowing water Valve (3), after draining finishes, close flowing water Valve (3);
(6), by the standing 6.5-7.5h of sequencing batch reactor (7), whole reaction time 12h;
(7), excess sludge enters behind alkaline fermentation pond (12), turn on agitator (13), rotating speed is 140-160 r/min;
(8), open automatic alkali adding device (14), make pH in alkaline fermentation pond (12) be controlled at 10 ± 0.1;
(9), excess sludge ferments after 4 days in alkaline fermentation pond, carries out mud-water separation, supernatant liquor is for being rich in organic acid salt.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103214087B (en) * | 2013-04-25 | 2014-05-07 | 同济大学 | Method for enriching phosphorus by using aerobic granular sludge |
| CN103241917A (en) * | 2013-05-21 | 2013-08-14 | 淮海工学院 | Method for biologically removing phosphorus by using acid produced by mixing municipal sludge and organic wastes |
| CN103663890B (en) * | 2013-12-02 | 2015-07-08 | 北京工业大学 | Method for reinforcing acid production amount of residual sludge alkaline fermentation through adding NaCl |
| CN104193128A (en) * | 2014-08-03 | 2014-12-10 | 北京工业大学 | Method for strengthening alkaline fermentation sludge reduction of excess sludge by adding NaCl |
| CN104498352B (en) * | 2014-11-17 | 2016-11-09 | 北京工业大学 | A kind of pretreatment by strong alkali strengthening excess sludge alkaline fermentation produces the apparatus and method of acetic acid |
| CN107117704A (en) * | 2017-06-28 | 2017-09-01 | 扬州大学 | The sequencing batch active sludge of low sludge yield |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1635125A (en) * | 2004-10-19 | 2005-07-06 | 同济大学 | Process for preparing organic acid from surplus sludge |
| CN101289248A (en) * | 2008-06-06 | 2008-10-22 | 湖南大学 | Operation method of non-anaerobic segment biological dephosphorization of sequencing batch reactor |
| CN101391839A (en) * | 2008-11-06 | 2009-03-25 | 北京城市排水集团有限责任公司 | Aerobic sludge age control device for sewage disposal plant and method |
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| US20110281255A1 (en) * | 2010-05-11 | 2011-11-17 | Pmc Biotec Company | Biological process for converting organic by-products or wastes into renewable energy and usable products |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1635125A (en) * | 2004-10-19 | 2005-07-06 | 同济大学 | Process for preparing organic acid from surplus sludge |
| CN101289248A (en) * | 2008-06-06 | 2008-10-22 | 湖南大学 | Operation method of non-anaerobic segment biological dephosphorization of sequencing batch reactor |
| CN101391839A (en) * | 2008-11-06 | 2009-03-25 | 北京城市排水集团有限责任公司 | Aerobic sludge age control device for sewage disposal plant and method |
Non-Patent Citations (3)
| Title |
|---|
| HONGYING YUAN et al.Improved bioproduction of short –chain fatty acids (SCFAs) from excess sludge under alkaline condtions.《Environmental Science & Technology》.2006,第40卷(第6期),2025-2029. |
| HONGYING YUAN et al.Improved bioproduction of short –chain fatty acids (SCFAs) from excess sludge under alkaline condtions.《Environmental Science & * |
| Technology》.2006,第40卷(第6期),2025-2029. * |
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