CN101885537B - Process for treating sewage with low sludge content - Google Patents
Process for treating sewage with low sludge content Download PDFInfo
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- CN101885537B CN101885537B CN2009101153499A CN200910115349A CN101885537B CN 101885537 B CN101885537 B CN 101885537B CN 2009101153499 A CN2009101153499 A CN 2009101153499A CN 200910115349 A CN200910115349 A CN 200910115349A CN 101885537 B CN101885537 B CN 101885537B
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Abstract
The invention relates to a process for treating sewage with low sludge content, and aims to reduce sludge in large scale in the process based on a sewage treatment process and overcome the defect of high residual sludge yield in the conventional aerobic sewage treatment process. The process is implemented by the following steps of: optimizing the intensity distribution of an aeration system to enhance membrane component washing effect; running the system stably under high-sludge concentration condition at any sludge concentration so as to increase the auto-digestion and death rate of the sludge; and controlling the aeration amount of the system and stably keeping dissolved oxygen in most areas in a biochemical system to be less than 1.0 mg/L to form a facultative membrane bioreactor process so as to form bacteria phase distribution in which facultative bacteria are advantageous in the system and lower sludge yield coefficient.
Description
Technical field
The present invention relates to a kind of sewage treatment process, especially relate to a kind of sewage treatment process of realizing mud decrement.
Background technology
In recent years, the sewage disposal work of China had had unprecedented development, and sewage work has alleviated China's water to a great extent and polluted crisis having played enormous function aspect solution China water pollution problems.According to statistics, China has built about more than 1500 of sewage work at present, nearly 7,000 ten thousand ton per days of treatment scale, according to conventional urban sewage treatment process excess sludge production is 2.5% of sewage load, then produce about 1,750,000 tons of the wet mud of residue every day, so large-scale sludge disposal problem becomes the important technology difficult problem that present municipal sewage treatment field faces.The mud problem that sewage work produces becomes increasingly conspicuous, and has caused showing great attention to of various circles of society.
China's sewage plant sludge is disposed the main following three kinds of modes that adopt at present: the one, and sanitary landfill; Landfill takies a large amount of land resources, and along with the increase year by year of sewage load, sludge yield increases substantially thereupon, and the mud demand that increases without limitation can't be satisfied in limited landfill place at all; Landfill requires the solid waste water ratio to be not more than 30% in addition, and conventional mud is difficult to reach this requirement, thus in recent years " mud sanitary landfill " to account for the ratio of international technology more and more littler, belong to restricted developing direction.The 2nd, burn; Incineration technology can effectively solve the handling problems of mud, but because the water ratio of dewatered sludge is higher, and calorific value is low, adopts burning mode fuel consumption bigger, the processing cost height, and easily cause secondary pollution.The 3rd, compost; The mud composition mainly contains the nutrition of plant-growth needs such as organism, nitrogen, phosphorus, after handling through composting process, can be made into compoiste fertilizer and is used for agricultural, can avoid because of the long-term application chemical fertilizer, causes the disadvantage of soil compaction salinization.But because the existing city sewage and sludge output of China is big, contain pollutent compositions such as a large amount of pathogenic bacterium and heavy metal, bring potential safety hazard to being back to agricultural.
Above-mentioned treatment process all is the method for disposing at traditional aerobic biochemical mud that treatment process produces, and is the end treatment pattern, the disposal costs height, and it is big to dispose difficulty, and does not realize the decrement significantly of mud from technology.
Summary of the invention
The present invention aims to provide the low sewage treatment process of a kind of sludge yield, starts with from sewage treatment process, is implemented in the technology the decrement significantly of mud, overcomes the big shortcoming of conventional aerobic sewage treatment process excess sludge production.
The present invention realizes by following steps: by optimizing the aerating system intensity distribution, raising is to the scouring effect of membrane module, can make system all can maintain steady running under the high sludge concentration condition under any sludge concentration, mud is in low organic loading running status, improve mud autodigestion rate of death by the Controlling System aeration rate, most of regional dissolved oxygen stable in the biochemical system is remained under the 1.0mg/L, form facultative aerobic membrane bioreactor, make that forming amphimicrobe in the system is that the bacterium of advantage distributes mutually, reduces the sludge yield coefficient.
Optimization aerating system of the present invention, be aeration intensity to be concentrated be distributed in the membrane module bottom, improved film surface cross-flow velocity, improved scouring effect to film, can make reactor assembly be increased under 10000～25000mg/L condition and keep steady running at activated sludge concentration, the activated sludge concentration of comparing conventional sewage treatment process 8000～12000 has improved 1 times, mud is in low organic loading running status, improve the autodigestion rate of death of mud, can reach the running balance of mud autodigestion and mud propagation;
Aeration intensity is rationally controlled in sewage disposal among the present invention, make except making film district middle and lower part dissolved oxygen to be the aerobic zone greater than 2mg/L, all the other most of regional dissolved oxygens are less than 1.0mg/L, keep hold concurrently oxygen or anoxic condition, formed facultative aerobic membrane bioreactor system, made the amphimicrobe ratio reach more than 70% based on amphimicrobe.Because the metabolic type of amphimicrobe determines its generation cycle much smaller than aerobic microbiological, compares traditional aerobic biochemical treatment process, has reduced the sludge yield coefficient.
Embodiment
The present invention realizes by following steps: by optimizing the aerating system intensity distribution, with the concentrated membrane module bottom that is distributed in of aeration intensity, improved film surface cross-flow velocity, improved scouring effect to film, can make reactor assembly be increased under 10000～25000mg/L condition and keep steady running at activated sludge concentration, the activated sludge concentration of comparing conventional sewage treatment process 8000～12000 has improved 1 times by the Controlling System aeration rate, make that film district middle and lower part dissolved oxygen is an aerobic zone greater than 2mg/L, other most of regional dissolved oxygen stables in the biochemical system are remained on 0.6mg/L, make the amphimicrobe ratio reach more than 70%, form facultative aerobic membrane bioreactor process, make that forming amphimicrobe in the system is that the bacterium of advantage distributes mutually, because the metabolic type of amphimicrobe determines its generation cycle much smaller than aerobic microbiological, compare traditional aerobic biochemical treatment process, reduce the sludge yield coefficient, sludge discharge is 0.02% of a sewage load.
Claims (1)
1. sewage treatment process that sludge yield is low, may further comprise the steps: by optimizing the aerating system intensity distribution, with the concentrated membrane module bottom that is distributed in of aeration intensity, make system be increased to steady running under 10000～25000mg/L condition at activated sludge concentration, mud is in low organic loading running status, improve mud autodigestion rate of death, reduce sludge yield; By the Controlling System aeration rate, make that film district middle and lower part dissolved oxygen is an aerobic zone greater than 2mg/L, other most of regional dissolved oxygen stables in the biochemical system are remained on below the 1.0mg/L, form facultative aerobic membrane bioreactor process, make that forming amphimicrobe in the system is that the bacterium of advantage distributes mutually, because the metabolic type of amphimicrobe determines its generation cycle much smaller than aerobic microbiological, reduce the sludge yield coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101153499A CN101885537B (en) | 2009-05-15 | 2009-05-15 | Process for treating sewage with low sludge content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101153499A CN101885537B (en) | 2009-05-15 | 2009-05-15 | Process for treating sewage with low sludge content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101885537A CN101885537A (en) | 2010-11-17 |
| CN101885537B true CN101885537B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101153499A Active CN101885537B (en) | 2009-05-15 | 2009-05-15 | Process for treating sewage with low sludge content |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730914B (en) * | 2012-07-12 | 2014-04-02 | 江西金达莱环保股份有限公司 | Method for processing livestock breeding wastewater by using anoxic membrane bioreactor |
| CN105000765A (en) * | 2015-08-05 | 2015-10-28 | 天紫环保产业开发有限责任公司 | Sludge acidification fermentation treatment system |
| CN105923767A (en) * | 2015-09-01 | 2016-09-07 | 江西金达莱环保股份有限公司 | Facultative anaerobic membrane bioreactor process and wastewater treatment system |
| CN105923748A (en) * | 2015-09-01 | 2016-09-07 | 江西金达莱环保股份有限公司 | Sewage treatment method and system of mud zero release |
| CN105948246A (en) * | 2015-09-01 | 2016-09-21 | 江西金达莱环保股份有限公司 | Non-zoned membrane biological sewage treatment method and non-zoned membrane biological sewage treatment system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1424265A (en) * | 2003-01-17 | 2003-06-18 | 清华大学 | Process and apparatus for wastewater by batched membrane-bioreactor |
| CN1454856A (en) * | 2003-05-30 | 2003-11-12 | 大连理工大学 | Batch type integrated membrane bioreactor |
| US20050045557A1 (en) * | 2003-09-02 | 2005-03-03 | Ch2M Hill, Inc. | Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent |
| CN101239753A (en) * | 2008-03-07 | 2008-08-13 | 太原大学 | Integrated methane-producing denitrogenation dephosphorization desulfurization sewage treatment method and device thereof |
-
2009
- 2009-05-15 CN CN2009101153499A patent/CN101885537B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1424265A (en) * | 2003-01-17 | 2003-06-18 | 清华大学 | Process and apparatus for wastewater by batched membrane-bioreactor |
| CN1454856A (en) * | 2003-05-30 | 2003-11-12 | 大连理工大学 | Batch type integrated membrane bioreactor |
| US20050045557A1 (en) * | 2003-09-02 | 2005-03-03 | Ch2M Hill, Inc. | Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent |
| CN101239753A (en) * | 2008-03-07 | 2008-08-13 | 太原大学 | Integrated methane-producing denitrogenation dephosphorization desulfurization sewage treatment method and device thereof |
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| CN101885537A (en) | 2010-11-17 |
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Owner name: JIANGXI JINDALAI ENVIRONMENTAL PROTECTION CO., LTD Free format text: FORMER NAME: JIANGXI JDL ENVIRONMENTAL PROTECTION RESEARCH LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 330100 Jiangxi city in Nanchang Province, the new County Changleng foreign investment industrial zone (District) No. 459 Industrial Avenue Patentee after: Jiangxi JDL Environmental Protection Ltd Address before: 330100 Jiangxi city in Nanchang Province, the new County Changleng foreign investment industrial zone (District) No. 459 Industrial Avenue Patentee before: Jiangxi JDL Environmental Protection Research Ltd. |