CN101913703B - Primary sludge fermentation pretreatment system for improving performances of dephosphorization and denitrification on town sewage - Google Patents
Primary sludge fermentation pretreatment system for improving performances of dephosphorization and denitrification on town sewage Download PDFInfo
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- CN101913703B CN101913703B CN2010102184389A CN201010218438A CN101913703B CN 101913703 B CN101913703 B CN 101913703B CN 2010102184389 A CN2010102184389 A CN 2010102184389A CN 201010218438 A CN201010218438 A CN 201010218438A CN 101913703 B CN101913703 B CN 101913703B
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Abstract
The invention provides a primary sludge fermentation pretreatment system for improving the performances of dephosphorization and denitrification on town sewage, which comprises a primary settlement and fermentation tank (1) which integrates the functions of primary settlement and fermentation into one body, a water inlet and distribution system (2), a mud scraping and sucking bridge (3) arranged at the top of the primary settlement and fermentation tank (1), a plurality of propellers (4) arranged on the mud scraping and sucking bridge (3), a water outlet weir plate (5) arranged on the upper part of the primary settlement and fermentation tank (1), a water outlet collecting tank (6), and a slurry discharging subsystem arranged at the bottom of the primary settlement and fermentation tank. The water inlet and distribution system is connected with a grid and a sand setting treatment water outlet (A) arranged in front thereof via a pipeline. The water outlet collecting tank (6) is connected with a subsequent biological denitrification and dephosphorization process structure (B) via a pipeline. The slurry discharging subsystem is connected with a subsequent sludge treatment structure (C) via a sludge pump and a pipeline. The system integrates the functions of biological flocculation, precipitation, hydrolysis and fermentation into one body and can improve the quality of water flowing into town sewage treatment plants. The system can also improve biological denitrification and dephosphorization capabilities and the operation effect of the whole process.
Description
Technical field:
The present invention relates to a kind of pretreatment system of town sewage, particularly a kind of first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance.
Background technology:
The pollutant removal object of urban wastewater treatment firm and emission control index mainly comprise COD (COD), BOD (BOD
5), suspended solids (SS), ammonia nitrogen (NH
3-N), total nitrogen (TN) and total phosphorus (TP).No. 21 bulletin according to State Environmental Protection Administration's issue in 2006; The 4.1.2.2 bar of " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) is revised as " when the urban wastewater treatment firm water outlet enters sealing, semiclosed waters such as country and the major river valley of economize confirming and lake, reservoir; carry out the A standard of primary standard; when entering GB3838 surface water III class function waters (except the Potable Water Conservation district and Swimming area of delimitation), two types of function waters of GB3097 seawater, the B standard of execution primary standard ".
The first discharge standard of GB 18918-2002 has proposed quite high requirement to the emission control of nitrogen, phosphorus, and wherein primary standard A standard is: TP≤0.5mg/L, NH
3-N≤5mg/L, TN≤15mg/L, primary standard B standard is TP≤1.0mg/L, NH
3-N≤8mg/L, TN≤20mg/L.But the water inlet C/N ratio of China's overwhelming majority urban wastewater treatment firm is obviously on the low side, water inlet BOD
5/ TKN ratio only 3～4 is starkly lower than 5～6 of developed country, has a strong impact on the biological dephosphorize denitrification ability.Be provided with under the situation of conventional preliminary sedimentation tank, because different to the removal ratio of carbon, nitrogen, the C/N ratio problem of lower can be more outstanding, BOD
5/ TKN ratio can be reduced to 2.5～3 level, and the unitary treatment efficiency of follow-up biological dephosphorization and denitrification process can receive more significantly disadvantageous effect.
Mass production operation practice both domestic and external and laboratory study result show; The influent quality characteristic has very significantly influence to the dephosphorization and denitrification effect of urban wastewater treatment firm; The test determination result that country's urban water supply and drainage Engineering Technical Research Centre is accomplished in the Taihu Lake basin urban wastewater treatment firm shows; It is very limited only to carry out the TN removal amount that endogenous denitrification improved through the hydraulic detention time that increases the biological denitrification pond; And the organic denitrification denitrogenation speed of fast degraded biologically is 7～9 times of endogenous denitrification speed; When the outside added the fast degraded biologically organism, the TN clearance can be significantly improved, and the carbon source of water inlet constitutes and C/N ratio is the key factor that influences biological denitrificaion and phosphor-removing effect.
Therefore; How to be directed against the actual water quality situation of China's town sewage and increasingly high dephosphorization denitrogenation processing requirements; Propose new first heavy and sludge fermentation treatment system and treatment process, in the inorganic suspended solids component of effectively removing in the sewage, keep its organic constituent as far as possible; Simultaneously the graininess organic constituent is converted into solvability organic constituent capable of being fast degraded, has crucial practical value.
Summary of the invention:
The object of the invention just is to overcome the deficiency that exists in the above-mentioned prior art; And a kind of first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance is provided; This system has biofloculation, deposition and hydrolysed ferment function; Can obviously improve the influent quality characteristic of urban wastewater treatment firm, improve the last effect of its biological dephosphorize denitrification ability and integrated artistic flow process.
As above design; Technical scheme of the present invention is: a kind of first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance; It is characterized in that: by the first heavy fermentation vat (1), the water inlet water distribution system (2) that integrate just heavy and fermentation function, be installed on scraping of just heavy fermentation vat top and inhale mud crane span structure (3), be installed on and scrape several thrusters (4), the water outlet weir plate (5) that is positioned at just heavy fermentation vat top inhaled on the mud crane span structure, go out water collecting groove (6) and the spoil disposal subsystem composition that is positioned at bottom the just heavy fermentation vat; Wherein, The central tube water distributor is connected with the grid and the sand setting treat effluent mouth A of front end through pipeline; Go out water collecting groove (6) and be connected with follow-up biological dephosphorization and denitrification process structures B through pipeline, the spoil disposal subsystem is connected with follow-up sludge treatment structures C through sludge pump and pipeline.
Have in the above-mentioned just heavy fermentation vat and have the active suspended sludge layer of biological fermentation (9), the interfacial level of suspended sludge layer be less than or equal to just heavy effective pond, fermentation vat top dark 1/3.
The design surface rate of load condensate of above-mentioned just heavy fermentation vat is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min, and the solid retention time of suspended sludge layer is 1～5d.
Above-mentioned water inlet water distribution system (2) is the center drum water distributor of band nose cone or inclined to one side bottom opening, and it goes out the inclined to one side bottom position in bottom that head piece is positioned at just heavy fermentation vat, and the hole of central tube water distributor is a horizontal direction 45 opening.
Above-mentioned thruster (4) is low speed underwater scooter or submersible agitator.
The present invention has following advantage and positively effect:
(1) multiple functional; Simple structure; In a reaction tank, accomplish separating of water inlet suspended solids and the liquefaction decomposition of colloidal solid, the hydrolysis of complicated macromolecule organic, organic acidogenic fermentation and solid residue and tunning simultaneously; Sewage quality is constituted take place to improve the dephosphorization denitrogenation ability of its subsequent technique than obvious variation.
(2) this pretreatment system can ferment by biological hydrolysis, three kinds of modes such as biofloculation deposition, physical sedimentation separation move; Water quality and quantity to adapt to the different periods of sewage work changes; Technology operation adjustment handiness obviously improves, and the construction costs of whole technological process and running cost reduce.
(3) suspended sludge layer height in the reaction tank and sludge concentration can be passed through the in addition control flexibly of adjustment of thruster stirring intensity (power and speed); To reach different acidication and solid separating effects, satisfy the improvement demand of follow-up biological dephosphorization and denitrification process to influent quality.
(4) sewage pretreating effect of the present invention is: water inlet suspended solids and colloidal liquefaction rate of decomposition reaches 15%～50%, the volatile fat acid concentration improves 20%～150%, the VSS/SS ratio of heavy fermentation water outlet just improves 20%～60%.
Description of drawings:
Fig. 1 is just heavy fermentation pretreatment system structure 1 synoptic diagram of the present invention.
Fig. 2 is just heavy fermentation pretreatment system structure 2 synoptic diagram of the present invention.
Embodiment:
As depicted in figs. 1 and 2; In this specific embodiment; Sewage primary sedimentation fermentation vat pretreatment system of the present invention by the first heavy fermentation vat (1), the water inlet water distribution system (2) that integrate just heavy and fermentation function, be installed on scraping of just heavy fermentation vat top and inhale mud crane span structure (3), be installed on and scrape several low speed thrusters or submersible agitator, the water outlet weir plate (5) that is positioned at just heavy fermentation vat top inhaled on the mud crane span structure, go out water collecting groove (6) and the spoil disposal subsystem composition that is positioned at bottom the just heavy fermentation vat; Wherein, The central tube water distributor is connected with the grid and the sand setting treat effluent mouth A of front end through pipeline; Go out water collecting groove (6) and be connected with follow-up biological dephosphorization and denitrification process structures B through pipeline, the spoil disposal subsystem is connected with follow-up sludge treatment structures C through sludge pump and pipeline.The design surface rate of load condensate of above-mentioned just heavy fermentation vat is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min, and the solid retention time of suspended sludge layer is 1～5d.Above-mentioned water inlet water distribution system (2) is the center drum water distributor of band nose cone or inclined to one side bottom opening, and it goes out the inclined to one side bottom position in bottom that head piece is positioned at just heavy fermentation vat, and the hole of central tube water distributor is a horizontal direction 45 opening.Have in the above-mentioned just heavy fermentation vat and have the active suspended sludge layer of biological fermentation (9), the interfacial level of suspended sludge layer be less than or equal to just heavy effective pond, fermentation vat top dark 1/3.
Because above-mentioned technical characterstic makes the treatment effect and the operational efficiency of sewage primary sedimentation fermentation pretreatment system of the present invention and method obviously be superior to existing other types pretreatment system and method.According to the test determination of actual town sewage, sewage pretreating effect of the present invention is: water inlet suspended solids and colloidal liquefaction rate of decomposition reaches 15%～50%, the volatile fat acid concentration improves 20%～150%, the VSS/SS ratio of heavy fermentation water outlet just improves 20%～60%.
What need special proposition here is that above-mentioned description to specific embodiment is can understand and use the present invention for ease of those skilled in the art.The personnel of skilled obviously can be easily make various modifications and replenish specific embodiment, and are applied to the General Principle of this explanation and method among other embodiment and needn't pass through performing creative labour.Therefore, the invention is not restricted to above-mentioned specific embodiment, those skilled in the art should be within protection scope of the present invention for similar modification and the improvement of class Sihe that the present invention makes according to announcement of the present invention and method.
Claims (5)
1. first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance; It is characterized in that: by the first heavy fermentation vat (1), the water inlet water distribution system (2) that integrate just heavy and fermentation function, be installed on scraping of just heavy fermentation vat top and inhale mud crane span structure (3), be installed on and scrape several thrusters (4), the water outlet weir plate (5) that is positioned at just heavy fermentation vat top inhaled on the mud crane span structure, go out water collecting groove (6) and the spoil disposal subsystem composition that is positioned at bottom the just heavy fermentation vat; Wherein, Water inlet water distribution system (2) is connected with the grid and the sand setting treat effluent mouth A of front end through pipeline; Go out water collecting groove (6) and be connected with follow-up biological dephosphorization and denitrification process structures B through pipeline, the spoil disposal subsystem is connected with follow-up sludge treatment structures C through sludge pump and pipeline.
2. the first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance according to claim 1; It is characterized in that: have in the above-mentioned just heavy fermentation vat to have the active suspended sludge layer of biological fermentation (9), the interfacial level of suspended sludge layer be less than or equal to just heavy effective pond, fermentation vat top dark 1/3.
3. the first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance according to claim 1 is characterized in that: the design surface rate of load condensate of above-mentioned just heavy fermentation vat is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min, and the solid retention time of suspended sludge layer is 1～5d.
4. the first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance according to claim 1; It is characterized in that: above-mentioned water inlet water distribution system (2) is the center drum water distributor of band nose cone or inclined to one side bottom opening; It goes out the inclined to one side bottom position in bottom that head piece is positioned at just heavy fermentation vat, and the hole of central tube water distributor is a horizontal direction 45 opening.
5. the first heavy fermentation pretreatment system that improves town sewage dephosphorization denitrogenation performance according to claim 1 is characterized in that: above-mentioned thruster (4) is low speed underwater scooter or submersible agitator.
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| CN2010102184389A CN101913703B (en) | 2010-07-06 | 2010-07-06 | Primary sludge fermentation pretreatment system for improving performances of dephosphorization and denitrification on town sewage |
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| CN2010102184389A CN101913703B (en) | 2010-07-06 | 2010-07-06 | Primary sludge fermentation pretreatment system for improving performances of dephosphorization and denitrification on town sewage |
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| CN101913703B true CN101913703B (en) | 2012-09-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104743743B (en) * | 2015-03-10 | 2016-09-07 | 浦华环保有限公司 | Up flow type precipitates hydrolysis and two-stage AO biochemical treatment system and application thereof |
| CN104944577B (en) * | 2015-06-29 | 2017-08-25 | 浦华环保股份有限公司 | A kind of just heavy hydrolytic tank and its application of sewage activity |
| CN109354343B (en) * | 2018-12-18 | 2021-07-06 | 青岛沐邦环境科技有限公司 | Sewage treatment system and sewage treatment method by utilizing sludge fermentation of primary sedimentation tank |
| CN111450616A (en) * | 2020-04-07 | 2020-07-28 | 中国市政工程华北设计研究总院有限公司 | Efficient activated sludge interception type secondary sedimentation tank process system with coupling depth filtering function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481705Y (en) * | 2001-06-11 | 2002-03-13 | 重庆市生华环保研究所 | Non-power domestic sewage intensified treating device |
| KR20020089215A (en) * | 2002-08-17 | 2002-11-29 | 주식회사 일류기술 | Wastewater Treatment Plant with Upflow Anaerobic Reactor |
| CN1962480A (en) * | 2006-12-08 | 2007-05-16 | 重庆大学 | Peripherally-distributed water deflection composite reactor for hydrolysis and acidification |
| CN101139155A (en) * | 2007-08-20 | 2008-03-12 | 北京科技大学 | Non-excess activated sludge discharged printing and dyeing wastewater processing equipment and operation method thereof |
| CN201106003Y (en) * | 2007-09-24 | 2008-08-27 | 中山市环保实业发展有限公司 | Integral self-reflux multi-stage biochemical sewage water processing unit having sludge scraper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6758965B2 (en) * | 2002-08-19 | 2004-07-06 | Great Vision Bioenvironmental Engineering Limited | Apparatus for treating wastewater from catering industry |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481705Y (en) * | 2001-06-11 | 2002-03-13 | 重庆市生华环保研究所 | Non-power domestic sewage intensified treating device |
| KR20020089215A (en) * | 2002-08-17 | 2002-11-29 | 주식회사 일류기술 | Wastewater Treatment Plant with Upflow Anaerobic Reactor |
| CN1962480A (en) * | 2006-12-08 | 2007-05-16 | 重庆大学 | Peripherally-distributed water deflection composite reactor for hydrolysis and acidification |
| CN101139155A (en) * | 2007-08-20 | 2008-03-12 | 北京科技大学 | Non-excess activated sludge discharged printing and dyeing wastewater processing equipment and operation method thereof |
| CN201106003Y (en) * | 2007-09-24 | 2008-08-27 | 中山市环保实业发展有限公司 | Integral self-reflux multi-stage biochemical sewage water processing unit having sludge scraper |
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Effective date of registration: 20170623 Address after: 300074 Hexi District Meteorological Observatory Road, Tianjin, No. 99 Patentee after: China public works North China design studies Zong Yuan company limited Address before: 300074 Hexi District Meteorological Observatory Road, Tianjin, No. 99 Patentee before: National City Water Supply and Drainage Engineering Technology Research Center |
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