CN101948231B - High-concentration sludge anaerobic digestion process for mechanical pre-dehydration of sludge - Google Patents
High-concentration sludge anaerobic digestion process for mechanical pre-dehydration of sludge Download PDFInfo
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- CN101948231B CN101948231B CN2010105049976A CN201010504997A CN101948231B CN 101948231 B CN101948231 B CN 101948231B CN 2010105049976 A CN2010105049976 A CN 2010105049976A CN 201010504997 A CN201010504997 A CN 201010504997A CN 101948231 B CN101948231 B CN 101948231B
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- 239000010802 sludge Substances 0.000 title claims abstract description 69
- 230000029087 digestion Effects 0.000 title claims abstract description 25
- 230000018044 dehydration Effects 0.000 title claims abstract description 24
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000010865 sewage Substances 0.000 claims abstract description 12
- 239000006228 supernatant Substances 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 238000011085 pressure filtration Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000011343 solid material Substances 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract 1
- 230000008092 positive effect Effects 0.000 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 239000010801 sewage sludge Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000016615 flocculation Effects 0.000 description 6
- 238000005189 flocculation Methods 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009264 composting Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- 241000658379 Manihot esculenta subsp. esculenta Species 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- -1 cationic quaternary ammonium salt Chemical class 0.000 description 1
- 230000001149 cognitive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a high-concentration sludge anaerobic digestion treatment process for carrying out mechanical pre-dehydration on sludge, which comprises the following specific processes: feeding the sludge with high water content into a concentration tank, reducing the water content of the sludge to 97% after concentration treatment, and refluxing supernatant to a sewage treatment system; mechanically pre-dehydrating the concentrated sludge until the water content is about 88-90%, then introducing the pre-dehydrated sludge into a CSTR reactor for anaerobic digestion, wherein the sludge digestion is carried out under the condition of high concentration. The sludge after anaerobic digestion is further dehydrated, and the water content of the treated sludge cake is about 75 percent. The invention has the advantages and positive effects that: by adopting the technical scheme, the sludge dewatering effect is good, the volume of the sludge anaerobic digestion tank is greatly reduced, and the capital investment and the operation cost of a sewage treatment plant are reduced; the pre-dehydration of the sludge can improve the organic matter load in the sludge, and the subsequent treatment by adopting a CSTR anaerobic digestion tank suitable for high-concentration solid materials is beneficial to the resource utilization of the sludge.
Description
Technical field
The invention belongs to technical field of sludge treatment, relate to a kind of dewatering technology of mud that before the sludge digestion unit, adds pre-dewatering unit.
Background technology
In recent years, people are more and more higher to the requirement of environmental quality, and the management of various countries' environmental pollution is also constantly strengthened, and the biochemical processing of municipal wastewater and other organic sewages obtains general cognitive and popularization, yet these sewage treatment process can produce a large amount of residual active sludges.For the treatment and disposal of these residual active sludges, all relate to the thickening of mud.
In traditional dewatering technology of mud, general employing is carried out mud earlier and is concentrated, and carries out mechanical dehydration after the sludge digestion again.It is bulky to exist the anaerobic sludge digestion pond, and initial cost and running cost are higher, and the sludge dewatering effect is relatively poor, and the moisture percentage in sewage sludge height after the processing is unfavorable for the problems such as disposal that mud is follow-up.And the heat that usually produces in the winter time the time can not satisfy the insulation demand of anaerobic digester own.
Li Yaxin etc.
[1](Li Yaxin; Yue Xiuping. flocculation agent is to the strengthening effect [J] of high-rate anaerobic reactor granular sludge. Environmental Pollution and Control; 2004; 26 (5): 333～335) studied the influence of flocculation agent to granular sludge in the anaerobic reactor; discovery can promote the growth of anaerobic digestion bacterium under the effect of an amount of flocculation agent.Li Baoshi
[2](Li Baoshi. add the influence [D] that inert particulate and flocculation agent form anaerobic grain sludge under the normal temperature lower concentration water inlet condition. Chinese Marine University's environmental engineering, 2009.) inquired into and add the influence of flocculation agent to methanogenesis activity, after discovery adds the cationic quaternary ammonium salt flocculation agent, can improve the activity of anaerobic sludge, promote the activity of methanogen.Shi Yuejin
[3](Shi Yuejin. the dehydration of sludge from wastewater treatment plant, anaerobic digestion and anaerobic composting [D]. environmental engineering system of Zhejiang Polytechnical University, 1999.) discover that when moisture percentage in sewage sludge was 86% left and right sides, the anaerobic sludge digestion effect was best, gas production rate is also the highest.Luo Gang etc.
[4](Luo Gang, Xie Li, Zhou Qi, Sang Wenjing, Sun Jiawei. high temperature anaerobic CSTR reactor for treatment cassava alcohol waste water research [J]. Chinese water supply and drainage, 2008,24 (9): 13～16) studies show that, the anaerobism CSTR reactor that moves under the hot conditions can bear higher organic loading, can reach 14kgCOD/ (m
3D), have very strong anti impulsion load ability and anti-pH changing capability.
Summary of the invention
In order to address the above problem, the purpose of this invention is to provide and a kind ofly can significantly reduce the sewage water ratio, reduce the high concentration sludge Anaerobic Digestion technology of sludge volume, can obviously reduce investment and working cost, can reduce greenhouse gas emission simultaneously,
The high concentration sludge Anaerobic Digestion technology that mud is carried out the pre-dehydration of machinery of production renewable energy source.
Technical scheme of the present invention is: the high concentration sludge Anaerobic Digestion technology to mud carries out the pre-dehydration of machinery may further comprise the steps:
1. mud concentrates: the residue water ratio 99% above mud of sewage work is sent into the gravity concentration basin by sludge pump, and the moisture percentage in sewage sludge after concentrated is generally 97%, and when its water ratio reduced to 97% by 99%, the volume of mud can narrow down to original 1/3.Separated liquid supernatant is through being back to Sewage treatment systems;
2. mud dewaters in advance: described concentrated back mud is entered the dehydration machine room, dewatered by mechanical sludge dewatering equipment, the control moisture percentage in sewage sludge is 88%～90%;
3. anaerobic sludge digestion: the mud after the described dehydration is squeezed in the CSTR anaerobic sludge digester by sludge pump, kept that mixture pH carries out anaerobic digestion in the reactor under the condition of high temperature (about 60 ℃) about 7.0.
4. sludge dewatering: with sludge pump postdigestive mud is sent in the mechanical dewatering equipment, dehydration again, the final moisture content of the cake that generates further reduces, and is beneficial to the follow-up disposal of mud.
Advantage of the present invention and positively effect:
1. sludge dewatering is respond well, and sludge reduction is obvious;
2. take up an area of and lack, cost is low.The moisture percentage in sewage sludge that enters digester descends, and reduces the volume in anaerobic sludge digestion pond greatly, reduces the initial cost and the running cost of sewage work;
3. the pre-dehydration to mud can improve organic loading in the mud, is adopting the CSTR anaerobic digester that is suitable for the high concentrated, solid material to handle the advantage that then can give full play to this technology thereafter;
4. the ultimate disposal cost is low, reduces transportation cost, saves the landfill expense;
5. be beneficial to the recycling of mud, as marsh gas power generation, composting, agricultural, do building materials etc.
Description of drawings
Fig. 1 carries out the process flow sheet of the sludge anaerobic treatment process of the pre-dehydration of machinery to mud for the present invention.
Embodiment
Further specify the present invention by the following examples.
Mud concentrates: the excess sludge of sewage work (water ratio is more than 99%), and rely on sludge pump to send into the gravity concentration basin, the moisture percentage in sewage sludge after concentrating is generally 97%, and when its water ratio reduced to 97% by 99%, the volume of mud can narrow down to original 1/3.Separated liquid supernatant is through being back to Sewage treatment systems.
Mud dewaters in advance: concentrate back mud and enter the dehydration machine room, dewatered by mechanical sludge dewatering equipment, the control moisture percentage in sewage sludge is about 88%～90%.
Anaerobic sludge digestion: the mud after dehydration is squeezed into by sludge pump in the CSTR anaerobic sludge digester.Moisture percentage in sewage sludge after the pre-dehydration is lower, about 88%～90%, compares with traditional technology, can reduce the volume of anaerobic digester greatly, has improved the anaerobic digestion efficient and the unit volume biogas output of mud.
Sludge dewatering: with sludge pump postdigestive mud is sent in the mechanical dewatering equipment, dehydration again, the final moisture content of the cake that generates further reduces, and is beneficial to the follow-up disposal of mud.
Claims (4)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105049976A CN101948231B (en) | 2010-10-14 | 2010-10-14 | High-concentration sludge anaerobic digestion process for mechanical pre-dehydration of sludge |
| PCT/CN2010/080412 WO2012048504A1 (en) | 2010-10-14 | 2010-12-28 | Anaerobic digestion treatment process for high concentration sludge obtained from sludge mechanical predehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105049976A CN101948231B (en) | 2010-10-14 | 2010-10-14 | High-concentration sludge anaerobic digestion process for mechanical pre-dehydration of sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101948231A CN101948231A (en) | 2011-01-19 |
| CN101948231B true CN101948231B (en) | 2011-11-16 |
Family
ID=43451883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105049976A Expired - Fee Related CN101948231B (en) | 2010-10-14 | 2010-10-14 | High-concentration sludge anaerobic digestion process for mechanical pre-dehydration of sludge |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101948231B (en) |
| WO (1) | WO2012048504A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730916B (en) * | 2012-06-01 | 2014-08-27 | 南京国能环保工程有限公司 | Treatment process of in-depth dehydration and resource utilization for sludge |
| CN102923859B (en) * | 2012-11-29 | 2014-07-30 | 华纺股份有限公司 | Process for treating high-concentration printing-dyeing desizing waste water and aerobic excess sludge |
| CN102923922B (en) * | 2012-11-29 | 2014-04-16 | 华纺股份有限公司 | Technology for anaerobic treatment of high concentration desizing wastewater through utilizing pulverized fuel ash |
| CN102936084B (en) * | 2012-11-29 | 2014-04-16 | 华纺股份有限公司 | Printing and dyeing wastewater treatment process without sludge discharge |
| CN103435240A (en) * | 2013-08-02 | 2013-12-11 | 轻工业环境保护研究所 | Fermentation and re-dewatering method of dewatered sludge |
| CN103482846B (en) * | 2013-09-18 | 2014-12-03 | 华南理工大学 | Sludge dehydrating method and device |
| CN103951148B (en) * | 2014-04-23 | 2016-05-04 | 江苏康泰环保设备有限公司 | A kind of plant's ight soil utilization system and method |
| CN104310739B (en) * | 2014-10-20 | 2016-11-23 | 同济大学 | A kind of method promoting polycyclic aromatic hydrocarbons in sludge anaerobic degradation |
| CN104310741A (en) * | 2014-11-13 | 2015-01-28 | 轻工业环境保护研究所 | Hydrolytic acidification re-dehydration method for dehydrated sludge |
| CN106630507B (en) * | 2016-11-15 | 2023-05-02 | 南京绿新能源研究院有限公司 | Integrated equipment for anaerobic digestion of dehydrated excess sludge and operation method thereof |
| CN106380055B (en) * | 2016-11-16 | 2023-04-07 | 南京大学宜兴环保研究院 | Device for anaerobic digestion of sludge and operation method thereof |
| CN107226602A (en) * | 2017-06-09 | 2017-10-03 | 李超 | A kind of sludge anaerobic digestion system and method for sludge treatment based on bioleaching |
| CN108383348A (en) * | 2018-04-11 | 2018-08-10 | 华南理工大学 | A kind of device and method of sludge high temperature anaerobic digestion producing methane |
| CN111732324A (en) * | 2020-07-15 | 2020-10-02 | 赵誉 | Electromagnetic Homogeneous Catalytic Sludge Dewatering Process and System |
| CN113072275A (en) * | 2021-04-01 | 2021-07-06 | 新疆碧水源环境资源股份有限公司 | Novel water treatment process for sludge synergism |
| CN114105427A (en) * | 2021-12-22 | 2022-03-01 | 北京首创污泥处置技术有限公司 | System and method for improving sludge aerobic fermentation treatment efficiency |
| CN116835854B (en) * | 2023-03-13 | 2025-11-11 | 中冶生态环保集团有限公司 | Method for separating fine silt from sludge |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179898C (en) * | 2001-09-20 | 2004-12-15 | 中国石化集团齐鲁石油化工公司 | Sludge treatment method |
| JP2003300096A (en) * | 2002-02-06 | 2003-10-21 | Mitsubishi Heavy Ind Ltd | Method for anaerobic digestion of high-concentration sludge and apparatus for the same |
| CN100337948C (en) * | 2004-06-09 | 2007-09-19 | 高斌 | Comprehensive treatment method and system for sludge from city sewage processing |
| CN1247473C (en) * | 2004-12-17 | 2006-03-29 | 清华大学 | Urban sludge treatment method |
| JP2006281074A (en) * | 2005-03-31 | 2006-10-19 | Kobelco Eco-Solutions Co Ltd | Organic sludge treatment method |
| JP4457391B2 (en) * | 2005-07-15 | 2010-04-28 | 株式会社神鋼環境ソリューション | Organic sludge treatment method and treatment apparatus |
| WO2009092821A1 (en) * | 2008-01-25 | 2009-07-30 | David Ulmert | Treatment of biological sludge |
| ITMC20080135A1 (en) * | 2008-07-22 | 2010-01-23 | Nuova Maip Macchine Agric | SYSTEM OF TREATMENT OF SLUDGE COMING FROM WASTEWATER AND ITS ENERGY EXPLOITATION FOR COGENERATION. |
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2010
- 2010-10-14 CN CN2010105049976A patent/CN101948231B/en not_active Expired - Fee Related
- 2010-12-28 WO PCT/CN2010/080412 patent/WO2012048504A1/en not_active Ceased
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| Publication number | Publication date |
|---|---|
| WO2012048504A1 (en) | 2012-04-19 |
| CN101948231A (en) | 2011-01-19 |
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Inventor after: Li Zifu Inventor after: Xun Lei Inventor after: Yin Fubin Inventor after: Wang Tingting Inventor after: Jin Xin Inventor before: Li Zifu |
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Effective date of registration: 20190515 Address after: 210047 No. 606 Ningliu Road, Changlu Street, Jiangbei New District, Nanjing City, Jiangsu Province Patentee after: NANJING YANJIANG RESOURCES ECOLOGICAL SCIENCE RESEARCH INSTITUTE Co.,Ltd. Address before: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee before: University of Science and Technology Beijing |
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