CN204939072U - A kind of efficient denitrification aerobic granular sludge reactor - Google Patents
A kind of efficient denitrification aerobic granular sludge reactor Download PDFInfo
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- CN204939072U CN204939072U CN201520397341.7U CN201520397341U CN204939072U CN 204939072 U CN204939072 U CN 204939072U CN 201520397341 U CN201520397341 U CN 201520397341U CN 204939072 U CN204939072 U CN 204939072U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A kind of efficient denitrification aerobic granular sludge reactor, belongs to technical field of sewage.Comprise the reactor body for inoculating aerobic particle mud, bottom reactor body, water-in is set, top arranges liquidometer, the mouth of a river is set out in the middle part of reactor body, in reactor body cavity, aerating apparatus is set, ring-type diversion trench is set bottom reactor body, aerating apparatus is connected with gas blower, and water-in is connected with intake pump, and intake pump is connected with sewage distribution reservoir; Also comprise controller, controller and intake pump, gas blower, liquidometer control linkage.Above-mentioned a kind of efficient denitrification aerobic granular sludge reactor, has that contaminant removal efficiency is high, process costs is low, floor space is little, sludge output is low, is easy to the features such as large-scale application.
Description
Technical field
The utility model belongs to technical field of sewage, is specially a kind of efficient denitrification aerobic granular sludge reactor.
Background technology
In recent years, along with Urbanization Progress, China's water pollution has been that " Organic pollutants " of representative transform to " eutrophication pollution " of nitrate pollution by COD.In water body environment, nitrate pollution is serious, the lake alga eruption that nitrogen exceeds standard caused and coastal " red tide " occur again and again, but the more at present traditional activated sludge process sewage work technique of China does not still have efficient denitrification ability, and sewage treatment plant tail water qualified discharge becomes problem in the urgent need to address.Conventional activated sludge process is lower to total nitrogen removal efficiency, for improving denitrification effect, the basis of conventional activated sludge process develops enhanced nitrogen removal process (as anaerobic-anoxic-aerobic process), there is different dissolved oxygen realize microbial function subregion by arranging containing the reaction member of rate, and then realize denitrification denitrogenation.Because needs build independent reaction unit and sludge reflux, enhanced nitrogen removal process adds construction and working cost.On the other hand, municipal wastewater especially small town sewage has the high feature of the low ammonia nitrogen of COD, often needs to add carbon source in denitrification process, thus adds the cost of denitrogenation.
Aerobic particle mud has fine and close structure, good settling property, impact resistance and good Pollutant Treatment ability.Its inside is because resistance to mass transfer is to the restriction of dissolved oxygen, there is ecto-entad and form aerobic zone-oxygen-starved area structure, for denitrification microorganism group provides suitable living environment, there is synchronous nitration and denitrification effect in granule interior, make aerobic particle mud have good denitrification effect, and need not denitrification pond and external carbon addition be additionally set.Because aerobic particle mud technique is without the need to independently arranging second pond and denitrification pond, which reduce the floor space of 75% and the energy consumption of 50%.
Current aerobic particle mud method is mainly used in butchers, and high strength wastewater treatment (the volumetric loading 3kg/CODm such as to brewage
3more than d), there is good pollutant removing effect.But at low strength flow condition (volumetric loading 1.5kg/CODm
3below d) under, there is the problem of total nitrogen removal effect process difference in aerobic particle mud.At present, all lower (influent COD is less than 500mg/L, and volumetric loading is less than 1.5kg/CODm for China's most of municipal sewage plant influent concentration and load
3d), restriction is caused to the application of aerobic particle mud technique.Under high strength flow condition, aerobic particle mud growth velocity is fast, thus forms the larger dense granule (median size can reach more than 1cm) of particle diameter.The restriction of resistance to mass transfer makes dissolved oxygen infiltrate through granule interior, defines the aerobic-anaerobic district of ecto-entad in grain pattern, for denitrification microorganism group provides suitable living environment, thus has good synchronization denitrification effect.And under low strength flow condition, aerobic particle mud growth is slack-off, the grain diameter of formation is little (median size is less than 0.5mm), and resistance to mass transfer is low, makes dissolved oxygen penetrate into granule interior.Meanwhile, under low strength flow condition, COD and ammonia nitrogen are by rapid oxidation, and dissolved oxygen content in reactor is gone up rapidly, further promote the mass transfer of dissolved oxygen in granule interior, inhibit synchronous nitration and denitrification effect.Can dissolved oxygen content be reduced by reducing aeration intensity, but reduce hydraulic shear simultaneously.Research shows that high hydraulic shear is conducive to the generation of extracellular polymeric, and its effect is the hydrophobicity that improve aerobic particle mud, reduces surface Gibbs free energy, enhances mud avidity, and then promotes granulating.When hydraulic shear reduces, the stability of aerobic particle mud declines rapidly, easily causes granule sludge unstability to be disintegrated.Therefore, under the low strength flow condition of low COD height ammonia nitrogen, how promoting aerobic particle mud denitrification effect becomes and mainly studies a question.
Utility model content
For the above-mentioned problems in the prior art, the purpose of this utility model is to design the technical scheme providing a kind of efficient denitrification aerobic granular sludge reactor, it produces anoxic subregion by reducing reactor bottom dissolved oxygen, restriction dissolved oxygen granule interior infiltration thus form aerobic-anaerobic district, simultaneous denitrification and total nitrogen removal effect under strengthening low strength flow condition.
Described a kind of efficient denitrification aerobic granular sludge reactor, it is characterized in that the reactor body comprised for inoculating aerobic particle mud, bottom reactor body, water-in is set, top arranges liquidometer, the mouth of a river is set out in the middle part of reactor body, in reactor body cavity, aerating apparatus is set, aerating apparatus is arranged on reactor body total height 1/3-1/4 position, bottom reactor body and between aerating apparatus, a ring-type diversion trench is set every reactor body total height 1/8-1/10 position, ring-type diversion trench is fixed on reactor body inwall, aerating apparatus is connected with gas blower by inlet pipe, water-in is connected with intake pump by water inlet pipe, intake pump is connected with sewage distribution reservoir, also comprise controller, controller and intake pump, gas blower, liquidometer control linkage.
Described a kind of efficient denitrification aerobic granular sludge reactor, is characterized in that the height of reactor body and the ratio of internal diameter are 5-7:1.
Described a kind of efficient denitrification aerobic granular sludge reactor, is characterized in that aerating apparatus is arranged on reactor body total height 1/3-1/4 position, and make reactor body cavity top become aerobic zone, cavity bottom becomes oxygen-starved area.
Described a kind of efficient denitrification aerobic granular sludge reactor, it is characterized in that described ring-type diversion trench is to the tilted setting of reactor body cavity, the angle of ring-type diversion trench and horizontal plane is 40-50 degree, and the width of ring-type diversion trench is the 1/9-1/11 of reactor body internal diameter.
Described a kind of efficient denitrification aerobic granular sludge reactor, is characterized in that arranging a ring-type diversion trench every reactor body total height 1/9 position bottom reactor body and between aerating apparatus.
Above-mentioned a kind of efficient denitrification aerobic granular sludge reactor, by regulating aerating apparatus height, reduces reactor bottom dissolved oxygen, and generation anoxic subregion strengthens the pollutant removal under low COD height ammonia nitrogen flow condition; Make water outlet COD and ammonia nitrogen removal frank reach more than 90%, nitrogen removal rate reaches more than 80%; Meanwhile, improve aerating apparatus height reduction aerobic zone volume, make energy consumption needed for aeration reduce 25%-35%; The utility model has that contaminant removal efficiency is high, process costs is low, floor space is little, sludge output is low, is easy to the features such as large-scale application.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the MLSS(mixed genetic-neural network of embodiment 1) and SVI(sludge volume index) changing trend diagram in time;
Fig. 3 is the reactor COD removal effect figure of embodiment 1;
Fig. 4 is reactor ammonia nitrogen and the total nitrogen removal effect figure of embodiment 1;
Fig. 5 is hydraulics mimic diagram in the reactor of embodiment 1;
Fig. 6 is reactor stable operation cycle internal contamination thing and the DO changing trend diagram in time of embodiment 1;
Fig. 7 is the plan structure schematic diagram of the utility model reactor body;
In figure: 1-liquidometer, 2-reactor body, 3-water outlet, 4-aerating apparatus, 5-ring-type diversion trench, 6-water-in, 7-water distribution reservoir, 8-intake pump, 9-controller, 10-gas blower.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Embodiment 1
This efficient denitrification aerobic granular sludge reactor, comprise the reactor body 2 for inoculating aerobic particle mud, water-in 6 is set bottom reactor body 2, top arranges liquidometer 1, the mouth of a river 3 is set out in the middle part of reactor body 2, in reactor body 2 cavity, aerating apparatus 4 is set, aerating apparatus 4 is arranged on reactor body 2 total height 1/3 position, bottom reactor body 2 and between aerating apparatus 4, a ring-type diversion trench 5 is set every reactor body 2 total height 1/9 position, ring-type diversion trench 5 is fixed on reactor body 2 inwall, aerating apparatus 4 is connected with gas blower 10 by inlet pipe, water-in 6 is connected with intake pump 8 by water inlet pipe, intake pump 8 is connected with sewage distribution reservoir 7, also comprise controller 9, controller 9 and intake pump 8, gas blower 10, liquidometer 1 control linkage.The height of reactor body 2 and the ratio of internal diameter are 6:1.Aerating apparatus 4 is arranged on reactor body 2 total height 1/3 position, and make reactor body 2 cavity top become aerobic zone, cavity bottom becomes oxygen-starved area.Described ring-type diversion trench 5 is to the tilted setting of reactor body 2 cavity, and ring-type diversion trench 5 is 45 degree with the angle of horizontal plane, and the width of ring-type diversion trench 5 is 1/10 of reactor body 2 internal diameter.In above-mentioned reactor, aerating apparatus 4 can be arranged on reactor body 2 total height 1/3.5 or 1/4 position, arranges a ring-type diversion trench 5 bottom reactor body 2 and between aerating apparatus 4 every reactor body 2 total height 1/8 or 1/10 position; The height of reactor body 2 and the ratio of internal diameter are 5:1 or 7:1; Ring-type diversion trench 5 is 40 degree or 50 degree with the angle of horizontal plane, and the width of ring-type diversion trench 5 is 1/9 or 1/11 of reactor body 2 internal diameter, and other structure, with embodiment 1, also can obtain the beneficial effect shown in the utility model.
Adopt the sewage water treatment method of above-mentioned efficient denitrification aerobic granular sludge reactor, adopt sequencing batch operation mode, the cycle of operation comprises into water, aeration, sedimentation, water outlet four-stage, all water inlets in device, aeration, water outlet are by controller 9 Automated condtrol, and the control method of controller 9 is conventional control methods; 1) intake: in reactor body 2, inoculate aerobic particle mud, inoculation mud amount 4000mg/L, pending municipal wastewater is first accessed sewage distribution reservoir 7, by intake pump 8, sewage is sent in reactor body 2 cavity from the water-in 6 bottom reactor body 2, flooding time is 10min, controls the upper liquid level of water inlet by the liquidometer 1 at reactor body 2 top; 2) aeration: give aerating apparatus 4 air inlet by gas blower 10, adopt air aeration, surperficial gas speed 1cm/s, aerating apparatus 4 is arranged on reactor body 2 total height 1/3 position, and make reactor body 2 cavity top become aerobic zone, cavity bottom becomes oxygen-starved area; Now the volume of aerobic zone and oxygen-starved area is 3-5:1; The bubbles entrain current that aerating apparatus 4 produces and granule sludge move upward in central zone, and granule sludge moves downwardly to bottom reactor body 2 along reactor body 2 wall after arriving reactor body 2 top under the effect of current; Under the effect of bottom annular diversion trench 5, partial sludge is in the circulation of reactor body 2 cavity bottom oxygen-starved area, and partial sludge collects to reactor body 2 chamber central and again produced bubble by aeration brings up current into, and aeration time is 210min; 3) sedimentation: carry out leaving standstill of 10min after stopping aeration, make settling of granular sludge in reactor and be separated with water; 4) water outlet: after mud-water separation is complete, after being processed by the water outlet 3 of reactor, sewage is discharged, water discharging time 10min.Described aerobic particle mud adopts sewage disposal second pond returned sluge, the municipal wastewater in described sewage distribution reservoir 7, COD concentration 300-500mg/L, ammonia nitrogen 50-100mg/L, volumetric loading 0.9-1.5kg/CODm
3d, volume-exchange rate 40-60%.At above-mentioned sewage water treatment method: inoculate mud amount 3000mg/L or 5000mg/L in step 1), flooding time is 5min or 15min; Step 2) in: surperficial gas speed 0.5cm/s or 1.5cm/s, aeration time is 150min or 250min; In step 3): carry out leaving standstill of 5min or 10min after stopping aeration; In step 4): water discharging time is 5min or 10min; Method described in the other the same as in Example 1 also can obtain beneficial effect described in the utility model.
The beneficial effects of the utility model are further illustrated below by way of corresponding data.
Embodiment 1 runs 22d post-reactor granulating, median size more than 800 μm, reactor steady running, and sludge quantity sustainable growth is also stabilized in about 8000mg/L.Granule sludge has good settleability, and SVI is stabilized in below 30ml/g, as shown in Figure 2.After system stable operation, the clearance of ammonia nitrogen and COD maintains more than 90% all the time, as shown in Figure 3; Reactor has good denitrification denitrogenation effect, and nitrogen removal rate reaches more than 80%, as shown in Figure 4.Reactor Study on Flow Field shows, the bubbles entrain current that aerating apparatus 4 produces and granule sludge move upward in central zone, granule sludge moves downwardly to bottom reactor body 2 along reactor body 2 wall after arriving reactor body 2 top under the effect of current; Under the effect of bottom annular diversion trench 5, partial sludge is in the circulation of reactor body 2 cavity bottom oxygen-starved area, and partial sludge collects to reactor body 2 chamber central and again produced bubble by aeration brings up current into, as shown in Figure 5.Show dissolved oxygen determination in cycle during steady running, oxygen-starved area dissolved oxygen maintains about 0.17-0.48mg/L, possesses the condition of denitrification denitrogenation.Contaminant removal efficiency is measured and shows, along with ammonia nitrogen (N-NH
4 +) be oxidized to N-NO
3 -, in reactor, ammonia nitrogen concentration declines gradually, but N-NO
3 -there is not obvious rising in concentration, and total nitrogen (TN) concentration reduces gradually, illustrates in reactor to there is obvious synchronous denitrification effect, as shown in Figure 6.The utility model achieves aerobic sludge granulation and steady running under low strength flow condition, has good pollutant removal simultaneously.
Claims (5)
1. an efficient denitrification aerobic granular sludge reactor, it is characterized in that the reactor body (2) comprised for inoculating aerobic particle mud, reactor body (2) bottom arranges water-in (6), top arranges liquidometer (1), reactor body (2) middle part sets out the mouth of a river (3), aerating apparatus (4) is set in reactor body (2) cavity, aerating apparatus (4) is arranged on reactor body (2) total height 1/3-1/4 position, between reactor body (2) bottom and aerating apparatus (4), a ring-type diversion trench (5) is set every reactor body (2) total height 1/8-1/10 position, ring-type diversion trench (5) is fixed on reactor body (2) inwall, aerating apparatus (4) is connected with gas blower (10) by inlet pipe, water-in (6) is connected with intake pump (8) by water inlet pipe, intake pump (8) is connected with sewage distribution reservoir (7), also comprise controller (9), controller (9) and intake pump (8), gas blower (10), liquidometer (1) control linkage.
2. a kind of efficient denitrification aerobic granular sludge reactor as claimed in claim 1, is characterized in that the height of reactor body (2) and the ratio of internal diameter are 5-7:1.
3. a kind of efficient denitrification aerobic granular sludge reactor as claimed in claim 1, it is characterized in that aerating apparatus (4) is arranged on reactor body (2) total height 1/3-1/4 position, make reactor body (2) cavity top become aerobic zone, cavity bottom becomes oxygen-starved area.
4. a kind of efficient denitrification aerobic granular sludge reactor as claimed in claim 1, it is characterized in that described ring-type diversion trench (5) is to the tilted setting of reactor body (2) cavity, ring-type diversion trench (5) is 40-50 degree with the angle of horizontal plane, and the width of ring-type diversion trench (5) is the 1/9-1/11 of reactor body (2) internal diameter.
5. a kind of efficient denitrification aerobic granular sludge reactor as claimed in claim 1, is characterized in that arranging a ring-type diversion trench (5) every reactor body (2) total height 1/9 position between reactor body (2) bottom and aerating apparatus (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520397341.7U CN204939072U (en) | 2015-06-11 | 2015-06-11 | A kind of efficient denitrification aerobic granular sludge reactor |
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| CN201520397341.7U CN204939072U (en) | 2015-06-11 | 2015-06-11 | A kind of efficient denitrification aerobic granular sludge reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891646A (en) * | 2015-06-11 | 2015-09-09 | 浙江省城乡规划设计研究院 | High-efficiency denitrification aerobic granular sludge reactor and sewage treatment method |
| CN113830898A (en) * | 2021-10-26 | 2021-12-24 | 中国石油化工股份有限公司 | Sewage treatment system, treatment method and application |
-
2015
- 2015-06-11 CN CN201520397341.7U patent/CN204939072U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891646A (en) * | 2015-06-11 | 2015-09-09 | 浙江省城乡规划设计研究院 | High-efficiency denitrification aerobic granular sludge reactor and sewage treatment method |
| CN104891646B (en) * | 2015-06-11 | 2017-04-19 | 浙江省城乡规划设计研究院 | Denitrification aerobic granular sludge reactor and sewage treatment method |
| CN113830898A (en) * | 2021-10-26 | 2021-12-24 | 中国石油化工股份有限公司 | Sewage treatment system, treatment method and application |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160106 Effective date of abandoning: 20170419 |