CN101948215B - Garbage leachate treatment process - Google Patents
Garbage leachate treatment process Download PDFInfo
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- CN101948215B CN101948215B CN2010102693054A CN201010269305A CN101948215B CN 101948215 B CN101948215 B CN 101948215B CN 2010102693054 A CN2010102693054 A CN 2010102693054A CN 201010269305 A CN201010269305 A CN 201010269305A CN 101948215 B CN101948215 B CN 101948215B
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Abstract
The invention discloses garbage leachate treatment process, which comprises the following process steps of: (1) filtering garbage leachate with a fine grid and allowing obtained liquid part to enter a coagulating sedimentation tank; (2) adding a coagulant into the coagulating sedimentation tank, separating precipitate with stirring, and allowing obtained supernate to enter an adjusting tank; (3) adjusting the supernate obtained by step (2) in the adjusting tank until the pH value is neutral; (4) pumping the obtained neutral supernate obtained by step (3) into an upflow anaerobic sludge blanket for treatment by using an anaerobic recycle pump, and allowing effluent obtained after the anaerobic treatment to enter a denitrification tank and a nitrification tank for denitrification and nitrification treatment and then enter an ultrafiltration device for ultrafiltration; (5) bio-chemically modifying the ultrafiltrated effluent by ozone; and (6) performing secondary biochemical treatment on the modified water and then directly draining the processed water after the secondary biochemical treatment. The garbage leachate treatment process has the advantages of high efficiency, low energy consumption and easy operation and management.
Description
Technical field
The present invention relates to sewage treatment process, especially relate to a kind of advanced treatment process of percolate.
Background technology
In the current treatment of urban garbage, sanitary landfill and waste incineration are because it has advantage such as cost is low, convenient management and in refuse treatment, is used widely, and the percolate that rubbish produces is a kind of high pollution concentration, polycomponent organic waste water.Along with the quick growth of rubbish quantity, reach people to the environmental problem pay attention to day by day, add the more severe supervision standard that government handles problems to percolate, necessarily have a large amount of percolate treatment project in the years to come and will begin to build.
Comparatively sophisticated in the current now refuse leachate treatment technology is MBR, can be known by " 2009 national advanced prevention and cure of pollution exemplary teachings register ".But through the MBR water outlet COD behind anaerobism+nitration denitrification still between 400mg/L～800mg/L, far above direct emission standard.Because this portion C OD continues to add NF and RO not possess the directly condition of biochemistry basically so present advanced treatment technology has only.But these physical treatment methods exist the many technology barriers that can't go beyond like the pollution problem of film, the lost of life problem of film, the handling problems of separating dope, processing efficiency problem, energy consumption problem or the like.
Biochemical processing, because of its working cost is few, and can be effectively thorough degradation of contaminant, be optimal second-stage treatment process program.But, because the contained COD of ultrafiltration clear liquid basically can't biochemical treatment, therefore must carry out effective biochemical modification to it, just might carry out the secondary biochemical treatment.
Summary of the invention
In current percolate treating processes, drawbacks such as the poor efficiency that leachate treatment technology exists, high energy consumption, the object of the invention are to provide a kind of percolate treating process that possesses efficient, less energy-consumption, is easy to operational management.
The present invention is achieved in that a kind of treatment process of percolate, takes following process step:
(1), percolate filters solid outward transport backfill wherein, liquid portion entering coagulative precipitation tank through fine fack;
(2), add coagulating agent at coagulative precipitation tank, and under the effect of stirrer precipitation separation, the supernatant of gained gets into equalizing tank;
(3), the supernatant of step (2) gained is regulated pH to neutral through equalizing tank;
(4), the neutral supernatant of step (3) gained is squeezed into by the anaerobism recycle pump that the upward flow formula is anaerobic mud bed to be handled; Methane recovery wherein is used to improve the temperature of waste water, and the effluent after the anaerobic treatment gets into denitrification pond, nitrification tank and carries out that denitrification and nitration treatment are laggard goes into ultra-filtration equipment and carry out ultrafiltration;
(5), the clear liquid after the ultrafiltration carries out the biochemical modification of ozone, the biochemical reforming system of ozone is made up of ozone reactor and ozone oxidation pond, the employing ozone oxidation also is aided with interior electrolysis means, and the ultrafiltration clear liquid is carried out modification;
(6), after the water of modification after handling carries out secondary biochemical treatment again, directly discharge.
As a kind of optimal way, the throw out of the filtering solids of step (1) fine fack, step (2) coagulative precipitation tank and the throw out after step (6) secondary biochemical treatment got into carry out sludge dewatering again after sludge thickener concentrates.
Concrete, the coagulating agent in the step (2) is Poly aluminum Chloride (PAC) and/or calcium hydroxide.
Concrete, the ultra-filtration equipment in the step (4) is external tubular type ultra-filtration equipment.
Concrete, the nitrification tank in the step (4) utilizes gas blower that the gas of reaction is discharged when nitration treatment.
The advanced waste treatment method that the present invention proposes adopts coagulating sedimentation+UASB+MBR+O
3Oxidation modification+secondary biochemical treatment technology, the ultrafiltration clear liquid can pass through normal biochemical reaction through after the ozone oxidation, effectively thoroughly degradation of contaminant, directly qualified discharge.The inventive method can be used for the advanced treatment of city garbage percolate, also can be used for the processing of other organic wastewater with difficult degradation thereby.Less than 100mg/L, not only the percolate processing efficiency is high, and reduced investment through the supernatant C OD concentration after the present invention's processing, and running cost is low, has reached the practical applications level.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is done further explain.
A kind of treatment process of percolate, take following process step:
(1), percolate filters solid outward transport backfill wherein, liquid portion entering coagulative precipitation tank through fine fack;
(2), add Poly aluminum Chloride (PAC) and calcium hydroxide at coagulative precipitation tank, and under the effect of stirrer precipitation separation, the supernatant of gained gets into equalizing tank;
(3), the supernatant of step (2) gained is regulated pH to neutral through equalizing tank;
(4), the neutral supernatant of step (3) gained is squeezed into by the anaerobism recycle pump that the upward flow formula is anaerobic mud bed to be handled; Methane recovery wherein is used to improve the temperature of waste water; And the effluent after the anaerobic treatment gets into the denitrification pond, nitrification tank carries out denitrification and nitration treatment; Nitrification tank utilizes gas blower that the gas of reaction is discharged when nitration treatment, and aftertreatment fluid gets into external tubular type ultra-filtration equipment and carries out ultrafiltration;
(5), the clear liquid after the ultrafiltration carries out the biochemical modification of ozone, the biochemical reforming system of ozone is made up of ozone reactor and ozone oxidation pond, the employing ozone oxidation also is aided with interior electrolysis means, and the ultrafiltration clear liquid is carried out modification;
(6), after the water of modification after handling carries out secondary biochemical treatment again, directly discharge.
The throw out of the filtering solids of step (1) fine fack, step (2) coagulative precipitation tank and the throw out after step (6) secondary biochemical treatment get into and carry out sludge dewatering again after sludge thickener concentrates simultaneously.
More than be that the treatment process of a kind of percolate of the present invention is set forth; Be used for helping to understand the present invention; But embodiment of the present invention is not restricted to the described embodiments; Change, the modification that other any do not deviate under the principle of the invention to be done, substitute, combination, simplify, all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. the treatment process of a percolate is characterized in that taking following process step:
(1), percolate filters solid outward transport backfill wherein, liquid portion entering coagulative precipitation tank through fine fack;
(2), add coagulating agent at coagulative precipitation tank, and under the effect of stirrer precipitation separation, the supernatant of gained gets into equalizing tank;
(3), the supernatant of step (2) gained is regulated pH to neutral through equalizing tank;
(4), the neutral supernatant of step (3) gained is squeezed into by the anaerobism recycle pump that the upward flow formula is anaerobic mud bed to be handled; Methane recovery wherein is used to improve the temperature of waste water, and the effluent after the anaerobic treatment gets into denitrification pond, nitrification tank and carries out that denitrification and nitration treatment are laggard goes into ultra-filtration equipment and carry out ultrafiltration;
(5), the clear liquid after the ultrafiltration carries out the biochemical modification of ozone, the biochemical reforming system of ozone is made up of ozone reactor and ozone oxidation pond, the employing ozone oxidation also is aided with interior electrolysis means, and the ultrafiltration clear liquid is carried out modification;
(6), after the water of modification after handling carries out secondary biochemical treatment again, directly discharge.
2. the treatment process of a kind of percolate according to claim 1 is characterized in that: carry out sludge dewatering again after the throw out of the filtering solids of said step (1) fine fack, step (2) coagulative precipitation tank and the entering of the throw out after step (6) secondary biochemical treatment sludge thickener concentrate.
3. the treatment process of a kind of percolate according to claim 1, it is characterized in that: the coagulating agent in the said step (2) is Poly aluminum Chloride (PAC) and/or calcium hydroxide.
4. the treatment process of a kind of percolate according to claim 1, it is characterized in that: the ultra-filtration equipment in the said step (4) is external tubular type ultra-filtration equipment.
5. the treatment process of a kind of percolate according to claim 1 is characterized in that: the nitrification tank in the said step (4) utilizes gas blower that the gas of reaction is discharged when nitration treatment.
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| CN2010102693054A CN101948215B (en) | 2010-08-31 | 2010-08-31 | Garbage leachate treatment process |
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| CN2010102693054A CN101948215B (en) | 2010-08-31 | 2010-08-31 | Garbage leachate treatment process |
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| CN101948215A CN101948215A (en) | 2011-01-19 |
| CN101948215B true CN101948215B (en) | 2012-05-30 |
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| CN102249501B (en) * | 2011-07-15 | 2013-03-27 | 波鹰(厦门)科技有限公司 | Device and method for treating wastewater produced by hair-product manufacturing |
| CN102432130B (en) * | 2011-10-14 | 2013-03-27 | 朗照技术(北京)有限公司 | Leachate and concentrated solution treatment method for refuse landfill |
| CN102674626B (en) * | 2012-04-28 | 2013-08-21 | 东莞市科达环保工程有限公司 | System and method for treatment and recovery of electronic electroplating wastewater |
| CN103570182B (en) * | 2012-07-24 | 2015-07-22 | 上海洗霸科技股份有限公司 | Processing method and processing apparatus for garbage leachate |
| CN102861762B (en) * | 2012-09-27 | 2014-10-29 | 江苏维尔利环保科技股份有限公司 | Anaerobic digestion treatment method for organic garbages |
| CN103241909B (en) * | 2013-05-31 | 2014-01-29 | 波鹰(厦门)科技有限公司 | Process device for waste water generated in tobacco sheet production |
| CN104478157B (en) * | 2014-11-13 | 2016-05-18 | 嘉园环保有限公司 | A kind of processing method of percolate nanofiltration concentrate |
| CN104436770B (en) * | 2014-12-01 | 2016-05-04 | 长沙威保特环保科技有限公司 | Solid waste is processed percolate in field and is entered the front pretreatment system of regulating reservoir and processing method |
| CN104628230B (en) * | 2015-02-06 | 2017-02-01 | 江苏广域化学有限公司 | Equipment and process for sewage treatment |
| CN105776741A (en) * | 2016-03-23 | 2016-07-20 | 北京神雾环境能源科技集团股份有限公司 | Refuse pyrolysis comprehensive sewage treatment system and method |
| CN106365376A (en) * | 2016-08-30 | 2017-02-01 | 宜兴市中发水处理环保设备有限公司 | Treating system applied to garbage leachate |
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| CN107746149A (en) * | 2017-06-04 | 2018-03-02 | 江苏沃尔特环保有限公司 | A kind of New-type refuse vehicle percolation liquid treating system |
| CN109574372A (en) * | 2017-09-29 | 2019-04-05 | 上海中海龙高新技术研究院 | A kind of processing method of consumer waste infiltration liquid |
| CN111646636A (en) * | 2020-05-19 | 2020-09-11 | 深圳能源资源综合开发有限公司 | Pretreatment method and system for oily waste leachate |
| CN113233704A (en) * | 2021-05-18 | 2021-08-10 | 河北首朗新能源科技有限公司 | High-concentration organic wastewater treatment equipment and method |
| CN114735900A (en) * | 2022-05-06 | 2022-07-12 | 湖南省煜城环保科技有限公司 | Treatment process and treatment system for landfill leachate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05228459A (en) * | 1992-02-18 | 1993-09-07 | Kurita Water Ind Ltd | Apparatus for recovering methane gas from landfill site |
| 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 |
| CN101357812B (en) * | 2007-07-31 | 2010-12-15 | 深圳市百斯特环保工程有限公司 | Processing method for domestic garbage leachate |
| CN101597131B (en) * | 2009-06-05 | 2012-05-30 | 浙江旺能环保股份有限公司 | Method and device for treating garbage percolate |
| CN101671095B (en) * | 2009-09-11 | 2012-01-25 | 宇星科技发展(深圳)有限公司 | Garbage leachate treatment technique |
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