CN101445294A - A marsh gas preparation method of landfill leachate resources - Google Patents
A marsh gas preparation method of landfill leachate resources Download PDFInfo
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- CN101445294A CN101445294A CNA2009100448375A CN200910044837A CN101445294A CN 101445294 A CN101445294 A CN 101445294A CN A2009100448375 A CNA2009100448375 A CN A2009100448375A CN 200910044837 A CN200910044837 A CN 200910044837A CN 101445294 A CN101445294 A CN 101445294A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The present invention relates to a marsh gas preparation method of landfill leachate resources by converting landfill leachate containing high organic content after anaerobic fermentation to marsh gas through existing anaerobic reactor. The invention pertains to the technical field of resource utilization of waste liquid and environment protection project. The load of the reactor is 10-70kgCOD/m<SUP>3</SUP>. d; and the leachate inlet COD concentration is in the range of 10000-100000mg/L. The processing result is as follows: 800f leachate organic matter is converted into methane; liquid COD concentration down to 200-5000mg/L after processing; methane gas production is 5-25L/L. d, namely 5-25 litre methane will be produced per day per litre by the reactor. The method described in the invention processes waste liquid which is beneficial for environment protection, and leachate is resource utilized for producing marsh gas which is of actual social meaning.
Description
Technical field
The present invention relates to a kind of landfill leachate resources and produce the method for biogas, utilize existing anaerobic reactor, utilize the percolate that contains higher organic content, make its anaerobically fermenting be converted into biogas.The invention belongs to effluent resource utilization and environmental engineering technical field.
Background technology
Along with the raising of living standards of the people, domestic waste output sharply rises, and has meanwhile produced a large amount of percolates, and the organic concentration height of percolate, character is changeable, component is complicated, and its effective processing has become a global difficult problem.Generally be that percolate is handled as waste water at present both at home and abroad, the purpose of processing is a qualified discharge, and is not purpose to produce biogas.
From utilization of resources angle, percolate is huge energy raw material.The COD of initial leachate is up to several ten thousand mg/litre, BOD
5/ COD has the potentiality of huge producing methane through anaerobic fermentation in 0.4～0.6 scope.But owing to there is the NH that contains higher concentration in the initial leachate in the percolate
3-N and contents of many kinds of heavy metal ion, and the water quality seasonal fluctuation is bigger, thereby when having remarkable high-carbon characteristic and huge product natural pond potentiality, also there is certain restraining effect in microorganism active.Therefore, research percolate resource utilization prepares the biogas method and has important social and realistic meaning.
Summary of the invention
The purpose of this invention is to provide a kind ofly, utilize landfill leachate resources to prepare the method for biogas utilizing under original device condition commonly used.
A kind of landfill leachate resources of the present invention prepares the method for biogas, it is characterized in that having following process and step:
A. utilize expanded granular sludge bed (EGSB) anaerobic reactor, with percolate elder generation standing sedimentation, remove granule foreign, the organic substance that requires to contain is more than 80%, and the chemical oxygen demand (COD) of percolate (COD) is at 10,000 to 100,000 mg/L;
B. percolate is sent into the bottom of expanded granular sludge bed (EGSB) anaerobic reactor, the reaction zone of the apparatus main body part of upwards flowing through, granule sludge in the reaction zone mainly is made of acid-producing bacteria and methanogen, make its generation anaerobically fermenting effect and produce fire damp, then through the triphase separator of reactor head, and, collect product biogas by the air outlet outflow;
Every processing parameter of controlling in preparation process is:
(1) temperature of reaction is 10～40 ℃, realizes by the insulation water-bath chuck of reactor assembly outside;
(2) pH of percolate is controlled at 7～8; Regulate with alkali lye such as yellow soda ash;
(3) load of reactor assembly is 10～70kgCOD/m
3.d;
(4) the liquid flow velocity that makes progress is 1～6m/h;
(5) hydraulic detention time is 2～70h;
(6) percolate feed liquor COD concentration is in 10000～100000mg/L scope;
C. process result: have 80% to change into methane in the percolate organism; Handle back liquid COD concentration and be reduced to 200～5000mg/L; The methane gas production rate is 5～25L/L.d, and promptly reactor every liter of volume every day produces 5～25 liters in methane.
The inventive method is utilized tradition existing equipment device commonly used; its superiority is on the one hand the percolate waste liquid to be carried out the resource utilization development and use, on the other hand waste water is handled, and makes it reach emission standard; help environment protection, therefore have social practical significance.
Description of drawings
Fig. 1 is the rough schematic of expanded granular sludge bed (EGSB) anaerobic reaction apparatus of the present invention's utilization.
Wherein: 1-percolate liquid-inlet pipe, 2-gets the mud mouth, 3-insulation water-bath chuck, 4-sludge reaction district, the 5-triphase separator, 6-methane air outlet, the 7-water outlet, the 8-surge tank, 9-storage diafiltration flow container, 10-goes out water collecting tank.
Embodiment:
The present invention has utilized expanded granular sludge bed (EGSB) anaerobic reaction apparatus commonly used.Referring to Fig. 1.Each digital code represents that meaning is as follows among Fig. 1: 1-percolate liquid-inlet pipe, and 2-gets the mud mouth, 3-insulation water-bath chuck, 4-sludge reaction district, the 5-triphase separator, 6-methane air outlet, the 7-water outlet, the 8-surge tank, 9-storage diafiltration flow container, 10-goes out water collecting tank
Treating processes is as follows: percolate enters surge tank 8 from storage diafiltration flow container 9, at this place after converging from reactor assembly top water outlet 7 effusive recirculation waters, in the water inlet pipe 1 of access to plant bottom, water inlet pipe 1 is provided with a plurality of water-ins, and water-in is unidirectional water inlet, and purpose is to prevent that locking apparatus has mud to fall into water-in when out of service it is stopped up; Liquid flows in the reaction zone, and the granule sludge in reaction zone reacts; Granule sludge mainly is made of acid-producing bacteria and methanogen, after reaction, make the organism in the percolate be converted into the biogas namely for methane, gas-solid liquid three-phase in the reactor is behind triphase separator 5, mud falls back in the reaction zone, gases methane is 6 outflows and collection from the air outlet, and water is then flowed out by water outlet 7, and a part is returned surge tank 8 and refluxed, another part flows out as water outlet, enters out water collecting tank 10.
Embodiment one: concentration of treatment is the percolate of 10000～30000mg/L, and HRT is 20～2h, and upwards flow velocity is 1～6m/h, and load is at 20～70kgCOD/m
3.d fluctuation, aerogenesis is at 5～25L/L.d.
Because the pH of percolate is between 3～6, it is bigger to fluctuate, water inlet pH should be brought up to 7～8 when starting beginning, progressively improve load, general each load improves 30～50%, after waiting to stablize, be that the COD clearance could improve load greater than 80%, the pH of also will intaking when improving load improves 0.5～1 unit, along with the carrying out of domestication, to in time adjust pH, make it to be between 7～8.
Embodiment two: concentration of treatment is the percolate of 30000～70000mg/L, and HRT is 70～10h, and upwards flow velocity is 1～6m/h, and load is at 20～70kgCOD/m
3.d fluctuation, aerogenesis is at 5～25L/L.d.
Because the pH of percolate is between 3～6, it is bigger to fluctuate, water inlet pH should be brought up to 7～8 when starting beginning, progressively improve load, general each load improves 30～50%, after waiting to stablize, be that the COD clearance could improve load greater than 80%, the pH of also will intaking when improving load improves 0.5～1 unit, along with the carrying out of domestication, to in time adjust pH, make it to be between 7～8.
HRT in the above-mentioned example is expressed as hydraulic detention time.
The result shows in the above-mentioned example: percolate feed liquor organism has 80% to be converted to methane approximately, and productive rate is 0.2～0.4LCH
4/ gCOD
Remove, represent that promptly every removal 1gCOD can produce 0.2～0.4LCH4.
Claims (1)
1. a landfill leachate resources prepares the method for biogas, it is characterized in that having following process and step:
A. utilize expanded granular sludge bed EGSB anaerobic reactor, with percolate elder generation standing sedimentation, remove granule foreign, the organic substance that requires to contain is more than 80%, and the chemical oxygen demand COD of percolate is at 10,000 to 100,000 mg/L;
B. percolate is sent into the bottom of expanded granular sludge bed EGSB anaerobic reactor, the reaction zone of the apparatus main body part of upwards flowing through, granule sludge in the reaction zone mainly is made of acid-producing bacteria and methanogen, make its generation anaerobically fermenting effect and produce fire damp, then through the triphase separator of reactor head, and, collect product biogas by the air outlet outflow;
Every processing parameter of controlling in preparation process is:
(1) temperature of reaction is 10～40 ℃, realizes by the insulation water-bath chuck of reactor assembly outside;
(2) pH of percolate is controlled at 7～8; Regulate with alkali lye such as yellow soda ash;
(3) load of reactor assembly is 10～70kgCOD/m
3.d;
(4) the liquid flow velocity that makes progress is 1～6m/h;
(5) hydraulic detention time is 2～70h;
(6) percolate feed liquor COD concentration is in 10000～100000mg/L scope;
C. process result: have 80% to change into methane in the percolate organism; Handle back liquid COD concentration and be reduced to 200～5000mg/L; The methane gas production rate is 5～25L/L.d, and promptly reactor every liter of volume every day produces 5～25 liters in methane.
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| CN2009100448375A CN101445294B (en) | 2009-01-04 | 2009-01-04 | A marsh gas preparation method of landfill leachate resources |
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| CN2009100448375A CN101445294B (en) | 2009-01-04 | 2009-01-04 | A marsh gas preparation method of landfill leachate resources |
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| CN101445294B CN101445294B (en) | 2010-12-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792209A (en) * | 2010-03-03 | 2010-08-04 | 陕西科技大学造纸环保研究所 | Anaerobic expanded granular sludge bed reactor and use thereof |
| CN101973796A (en) * | 2010-10-19 | 2011-02-16 | 北京元黄科技有限公司 | Organic waste treatment device and method |
| CN113060919A (en) * | 2021-03-29 | 2021-07-02 | 重庆大学 | Method for improving yield of excess sludge anaerobic digestion methane |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398470C (en) * | 2006-03-17 | 2008-07-02 | 深圳市百斯特环保工程有限公司 | Infiltration method for treating garbage |
| CN101172709A (en) * | 2007-10-17 | 2008-05-07 | 南京大学 | Method for anaerobic treatment of consumer waste leachate and reactor thereof |
| CN101314503A (en) * | 2008-06-18 | 2008-12-03 | 辽宁大学 | Processing method for garbage leachate |
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2009
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792209A (en) * | 2010-03-03 | 2010-08-04 | 陕西科技大学造纸环保研究所 | Anaerobic expanded granular sludge bed reactor and use thereof |
| CN101973796A (en) * | 2010-10-19 | 2011-02-16 | 北京元黄科技有限公司 | Organic waste treatment device and method |
| CN113060919A (en) * | 2021-03-29 | 2021-07-02 | 重庆大学 | Method for improving yield of excess sludge anaerobic digestion methane |
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