CN101955254B - Silt high-concentration activated sludge process for sewage treatment - Google Patents
Silt high-concentration activated sludge process for sewage treatment Download PDFInfo
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- CN101955254B CN101955254B CN201010115198XA CN201010115198A CN101955254B CN 101955254 B CN101955254 B CN 101955254B CN 201010115198X A CN201010115198X A CN 201010115198XA CN 201010115198 A CN201010115198 A CN 201010115198A CN 101955254 B CN101955254 B CN 101955254B
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- silt
- activated sludge
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- concentration activated
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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
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Abstract
On the basis of a low dissolved oxygen short-time deep nitrogen removal process for high-concentration activated sludge in municipal sewage provided by an inventor, and aiming at the limit of difficult maintenance of the high-concentration activated sludge due to low concentration of influent suspended matters, the invention provides a silt high-concentration activated sludge process for sewage treatment. The process has the obvious characteristics that the settlement performance of the activated sludge is improved by recovering and recycling and/or replenishing silt artificially to stabilize the high-concentration activated sludge of a maintenance system and strengthen the capacity of biological treatment, particularly the nitrogen removal capacity. The silt in the excess sludge is recovered by utilizing a silt separator, and the silt run off due to spoil disposal is only needed to be replenished in time so as to reduce the cost. The silt high-concentration activated sludge process has the advantages that the limit of the influent suspended matters is broken through, and the high-concentration activated sludge is maintained stably under the condition of low concentration of the influent suspended matters so as to achieve the extremely high effect of total nitrogen removal within quite short hydraulic residence time and simultaneously, remove other pollutants effectively.
Description
Technical field
The present invention relates to a kind of silt particle high-concentration activated sludge treatment process that is used for WWT; Can be used for municipal sewage treatment or similar Industrial Wastewater Treatment; Have through reclaiming and/or adding the characteristics that silt particle is kept high-concentration activated sludge, reach the effect that the degree of depth is in short-term denitrogenated.
Background technology
The municipal effluent high-concentration activated sludge LDO degree of depth is in short-term denitrogenated the basis that technology is technology of the present invention; Have the characteristics of activated sludge concentration height (MLVSS is more than the 2.5g/L), Aerobic Pond leading portion dissolved oxygen concentration low (about 1mg/L), can reach splendid efficiencies of nitrogen removal.For example, under the condition of hydraulic detention time 6.5h, total reflux ratio 2, water inlet total nitrogen 42.43mg/L, the water outlet total nitrogen is 6.43mg/L only, and actual clearance 84.30% substantially exceeds desirable clearance 75.87%.This technology also has fabulous removal effect to other pollutent, and effluent quality can reach the requirement of one-level A comprehensively.
The municipal effluent high-concentration activated sludge LDO degree of depth is in short-term denitrogenated the limitation of technology, is under the low condition of water inlet concentration of suspension, is difficult to the active sludge of stable maintenance high density.
Summary of the invention
The object of the invention, just in order to overcome the above-mentioned deficiency of prior art,
Settling tank is separated and sent back to silt in the excess sludge, and
The water inlet concentration of suspension is lowIt is the major technique means that Shi Rengong adds silt particle, solves the problem that under the low condition of water inlet concentration of suspension, is difficult to the stable maintenance high-concentration activated sludge.
The technical scheme that the present invention adopts is: recycles and reuses and/or adds heavy silt particle, significantly improve activated sludge settling property, even the water inlet concentration of suspension is low, and high-concentration activated sludge that also can the stable maintenance system.Silt particle in the excess sludge utilizes periodic precipitation silt particle separator to reclaim, and repeats to get back to system, only needs to replenish a small amount of silt particle that runs off.
The biochemistry pool of flow process of the present invention adopts " anoxic is aerobic " combination, and activated sludge concentration MLVSS is controlled at more than the 2.5g/L, and Aerobic Pond leading portion dissolved oxygen concentration is controlled at about 1mg/L.Water inlet sewage mixes the formation mixed solution with backflow mixed liquor and returned sluge, the anoxic pond of flowing through successively and Aerobic Pond carry out denitrification in anoxic pond, in the Aerobic Pond leading portion, carry out synchronous nitration and denitrification, in the Aerobic Pond back segment, carry out nitrated.Mixed solution gets into settling tank at last and carries out solid-liquid separation, discharges primary water and excess sludge, and all the other are back to anoxic pond, and the partially mixed liquid of Aerobic Pond also is back to anoxic pond simultaneously.Silt particle in the excess sludge utilizes periodic precipitation silt particle separator to recycle and reuse, get back to settling tank before.
In the periodic precipitation process, because the sedimentation speed of silt particle is very big, thus be deposited on the settling tank bottom, and the sedimentation speed of active sludge is less, then is deposited on settling tank top, the two can be by effective separation.Therefore, be the major technique means with the excess sludge periodic precipitation, can efficient recovery and recycling be deposited on the silt particle of bottom, periodic precipitation pond, discharge simultaneously top removal the residual active sludge of silt particle.
The invention has the beneficial effects as follows: the activated sludge settling property that contains more silt particle is fabulous, thoroughly breaks through the restriction of water inlet suspended substance, even the water inlet concentration of suspension is low, and also can stable maintenance system high-concentration activated sludge.Silt particle in the excess sludge utilizes periodic precipitation silt particle separator to recycle and reuse, so need not add silt particle in a large number, only needs to replenish the silt particle that runs off and gets final product, and significantly reduces cost.
The present invention can be widely used in all municipal sewage plants; Treatment effect is fabulous, can reach high total nitrogen removal effect, removes ammonia nitrogen, total phosphorus and other pollutent simultaneously quite effectively; Aeration rate is less, and additional silt particle amount is less, practices thrift running cost; The residence time is short, practices thrift construction investment, and is convenient to the existing utility transformation.
Description of drawings
Fig. 1, process flow sheet of the present invention.
Fig. 2, periodic precipitation silt particle separator process flow sheet of the present invention.
Embodiment
1. high (MLVSS is more than 2.5g/L), Aerobic Pond leading portion dissolved oxygen concentration low (1mg/L) of activated sludge concentration, hydraulic detention time are lacked (like 6.5h), and biochemistry pool adopts " anoxic is aerobic " combination, and mud-water separation adopts common settling tank.
2. the silt particle in the excess sludge utilizes the periodic precipitation pond in the periodic precipitation silt particle separator, the wheel flow to mud, deposition, the silt particle that is deposited on the bottom is recycled and reused, get back to settling tank before, the excess sludge of having removed silt particle then is discharged into sludge treating system.
3. a small amount of loss of silt particle is that inevitably the silt particle in the water inlet can replenish.If the silt particle in the water inlet really very little,, then should before settling tank, replenish a small amount of silt particle so that silt particle is not enough because of loss.
4. if surplus sludge volume is less, and spoil disposal intermittently, then periodic precipitation silt particle separator can only be provided with 1 periodic precipitation pond.If surplus sludge volume is bigger, then periodic precipitation silt particle separator can be provided with 2 or above periodic precipitation pond.
Claims (5)
- A kind of silt high-concentration activated sludge method that is used for WWT1. silt high-concentration activated sludge sewage disposal process is characterized in that: Silt in the excess sludge is separated And send settling tank back to, The water inlet concentration of suspension is lowThe time before settling tank, add silt.
- 2. a kind of silt high-concentration activated sludge sewage disposal process according to claim 1 is characterized in that: utilize periodic precipitation silt separator to reclaim the silt in the excess sludge.
- 3. a kind of silt high-concentration activated sludge sewage disposal process according to claim 1 and 2 is characterized in that: biochemistry pool adopts " anoxic is aerobic " combination.
- 4. a kind of silt high-concentration activated sludge sewage disposal process according to claim 1 and 2, it is characterized in that: activated sludge concentration MLVSS is controlled at more than the 2.5g/L.
- 5. a kind of silt high-concentration activated sludge sewage disposal process according to claim 1 and 2 is characterized in that: Aerobic Pond leading portion dissolved oxygen concentration is controlled at 1mg/L
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010115198XA CN101955254B (en) | 2010-02-22 | 2010-02-22 | Silt high-concentration activated sludge process for sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010115198XA CN101955254B (en) | 2010-02-22 | 2010-02-22 | Silt high-concentration activated sludge process for sewage treatment |
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| Publication Number | Publication Date |
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| CN101955254A CN101955254A (en) | 2011-01-26 |
| CN101955254B true CN101955254B (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010115198XA Expired - Fee Related CN101955254B (en) | 2010-02-22 | 2010-02-22 | Silt high-concentration activated sludge process for sewage treatment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863130B (en) * | 2012-10-10 | 2015-09-30 | 金东纸业（江苏）股份有限公司 | The treatment process of active sludge |
| CN105859079A (en) * | 2016-04-20 | 2016-08-17 | 辽宁中部环保有限公司 | Biochemical sludge reduction integrated device and using method thereof |
| CN112358035A (en) * | 2020-06-09 | 2021-02-12 | 青岛颐和水务有限公司 | Carrier biological enhanced sewage treatment process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2767430Y (en) * | 2005-02-21 | 2006-03-29 | 于东江 | High rate precipitation device in water treatment |
| CN101648086A (en) * | 2009-09-02 | 2010-02-17 | 朱宁 | Rapid precipitating method and rapid precipitating and separating device |
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2010
- 2010-02-22 CN CN201010115198XA patent/CN101955254B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2767430Y (en) * | 2005-02-21 | 2006-03-29 | 于东江 | High rate precipitation device in water treatment |
| CN101648086A (en) * | 2009-09-02 | 2010-02-17 | 朱宁 | Rapid precipitating method and rapid precipitating and separating device |
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| CN101955254A (en) | 2011-01-26 |
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Granted publication date: 20121212 Termination date: 20130222 |