CN102951765A - Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification - Google Patents
Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification Download PDFInfo
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- CN102951765A CN102951765A CN201110254267XA CN201110254267A CN102951765A CN 102951765 A CN102951765 A CN 102951765A CN 201110254267X A CN201110254267X A CN 201110254267XA CN 201110254267 A CN201110254267 A CN 201110254267A CN 102951765 A CN102951765 A CN 102951765A
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- liquid waste
- penetrating fluid
- ammonia nitrogen
- waste liquid
- waste
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Abstract
The invention provides a process for treating a landfill penetrating fluid by chemical precipitation and biological denitrification, belonging to the field of environment protection and energy conservation. The process comprises the steps as follows: putting the penetrating fluid into a liquid waste collection tank to control liquid waste amount, flowing the liquid waste to a collision reaction tank quantitatively and feeding 6% of lime liquor to the reaction tank to regulate the pH value to about 10.1; and then, adding prepared precipitant MgSO4 and Na2HPO4 solution to the liquid waste, stirring uniformly by collision and putting the liquid waste to a secondary sedimentation tank to settle and remove insoluble substances. As the pH value of the liquid waste is regulated to be neutral in the second step, when the liquid waste enters a biological denitrification tank, the highly degradable organic matters and certain ammonia nitrogen in the liquid waste can provide enough nutrient substances for microbes; and due to the nitrification and the denitrification of the microbes, the organic matters and the remained ammonia nitrogen in the liquid waste can be removed well.
Description
Technical field
The present invention is mainly for environmental protection and energy-saving field, and definite is for the landfill waste penetrating fluid.Organic content is very high in this waste liquid, and ammonia nitrogen concentration is large.The present invention is directed to the waste liquid feature organism and ammonia nitrogen are effectively removed, reduce it to natural harm.
Background technology
The human lives has discharged a large amount of domestic refuses to nature, the method that the world today processes domestic refuse mainly is to carry out landfill, produced a large amount of high-enriched organics penetrating fluids behind the garbage loading embeading underground water security and peripheral physical environment are done great damage, treating refuse landfill penetrating fluid seems particularly urgent.
The main way for the treatment of refuse penetrating fluid divide for physico-chemical process with biological process.Biological process is the most frequently used a kind of method during percolate is processed, it comprises activated sludge process, stabilization pond, blodisc, anaerobic biological treatment etc., and ammonia nitrogen concentration is very high in the penetrating fluid, and this toxicity to microorganism is very large, cultivate the resisting high-concentration organism, the microbial population of high ammonia nitrogen is being explored always.Physico-chemical process comprises flocculence, reverse osmosis, charcoal absorption, chemical oxidation etc.Physico-chemical process has high removal efficient to organism and the ammonia nitrogen of penetrating fluid.But its facility investment is high, and working cost is high, and causes easily secondary pollution, and this has just limited the widespread use of physico-chemical process processing penetrating fluid.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, proposes the method that chemical precipitation combines with biological denitrificaion and solves the not tractable difficult problem of garbage loading embeading penetrating fluid.
Chemical precipitation of the present invention and biological denitrificaion treating refuse landfill penetrating fluid, be achieved by following technical proposals, penetrating fluid is introduced into the waste collection pond and controls waste liquid amount, the inflow crash response pond that waste liquid is quantitative, add 6% liquor calcis in the reaction tank waste liquid pH value is adjusted in about 10.1, experimental results show that NH
4 -Precipitating best pH value is 10.1, then adds the precipitation agent MgSO for preparing in waste liquid
4And Na
2HPO
4Solution fully collides and enters secondary sedimentation basins after the stirring and precipitate the removal insolubles, and this stage adds medicament and will be controlled at the ammonia nitrogen concentration that makes in the waste liquid in the organism field of activity, and the medicament usage quantity should not all be removed the ammonia nitrogen in the waste liquid.Second step is regulated the waste liquid pH value to neutral, waste liquid enters the biological denitrificaion pond, labile organic compound and suitable ammonia nitrogen can provide enough nutritive substances for microorganism in this moment waste liquid, and organism and residue ammonia nitrogen are well removed in nitrated, the waste liquid that denitrification makes of microorganism.
The present invention can effectively process the landfill waste penetrating fluid, and organism and ammonia nitrogen removal frank can reach more than 90%, and has saved the expense that simple physico-chemical process drops into a large amount of medicaments, and biochemical process is fully utilized.
The present invention has installed impeller in bottom in the biological denitrificaion pond, can make active sludge follow aerobic part iterative cycles at anaerobic part, and the organism in the waste liquid obtains more fully digest and decompose.
The present invention can adapt to the variation of landfill waste penetrating fluid water quality, and the two-stage combination treatment can well improve follows processing cost to the processing efficiency of landfill waste penetrating fluid, and has equipment simple, and easy handling is invested low, effective advantage.
Description of drawings
Fig. 1 is that chemical precipitation of the present invention and biological denitrificaion are processed landfill waste penetrating fluid artwork
1---water outlet 2---impeller 3---aeration head 4---water collecting basin
5---reaction tank 6---settling tank 7---aerobic zone 8---anaerobic zones
Embodiment
Referring to Fig. 1, the invention will be further described in conjunction with the embodiments.The permeate collection of garbage loading embeading factory in water collecting basin, is extracted into penetrating fluid in the reaction tank with pump, adds 6% liquor calcis to reaction tank the penetrating fluid pH value is adjusted to about 10, then add precipitation agent MgSO to reaction tank
4And Na
2HPO
4The penetrating fluid collision fully mixes, enter settling tank and carry out mud-water separation, then waste liquid enters biological processing unit, four jiaos are equipped with impeller bottom the biological tank, and aerobic zone is equipped with aeration head, and active sludge is sluggish flow in the pond, anaerobic-aerobic hockets, and the organism in the waste liquid is removed with ammonia nitrogen.This method can be saved working cost about 20% than single physical chemistry method, and treatment effect improves 10% than bioremediation effect, and processing efficiency improves 15%.
Claims (4)
1. a chemical precipitation and biological denitrificaion are processed landfill waste penetrating fluid technique, and it is characterized in that: penetrating fluid is introduced into the waste collection pond, and quantitative inflow crash response pond then adds alkali lye in the reaction tank again and regulates pH value, then adds precipitation agent; Regulate the waste liquid pH value to neutral, carry out ammonia nitrogen removal for second one.
2. chemical precipitation according to claim 1 and biological denitrificaion are processed landfill waste penetrating fluid technique, it is characterized in that: the alkali lye that adds reaction tank is that 6% liquor calcis is regulated the pH value about 10.1.
3. chemical precipitation according to claim 1 and biological denitrificaion are processed landfill waste penetrating fluid technique, it is characterized in that: the precipitation agent that adds in the waste liquid is MgSO
4And Na
2HPO
4Solution, this stage adds medicament and will be controlled at the ammonia nitrogen concentration that makes in the waste liquid in the organism field of activity, and the medicament usage quantity should not all be removed the ammonia nitrogen in the waste liquid.
4. chemical precipitation according to claim 1 and biological denitrificaion are processed landfill waste penetrating fluid technique, it is characterized in that: impeller has been installed in the bottom in the biological denitrificaion pond, can make active sludge follow aerobic part iterative cycles at anaerobic part, the organism in the waste liquid obtains more fully digest and decompose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110254267XA CN102951765A (en) | 2011-08-31 | 2011-08-31 | Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110254267XA CN102951765A (en) | 2011-08-31 | 2011-08-31 | Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102951765A true CN102951765A (en) | 2013-03-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110254267XA Pending CN102951765A (en) | 2011-08-31 | 2011-08-31 | Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification |
Country Status (1)
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020072360A (en) * | 2001-03-09 | 2002-09-14 | 주식회사 제일엔지니어링 | Biological Nitrogen Removal from Nitrogen-Rich Wastewaters by Partial Nitrification and Anaerobic Ammonium Oxidation |
| CN1493528A (en) * | 2003-08-29 | 2004-05-05 | 南化集团研究院 | Chemical precipitation method for treating ammonia nitrogen waste water |
| CN1872724A (en) * | 2006-06-21 | 2006-12-06 | 哈尔滨工业大学 | Pretreatment method for wastewater of ammonia nitrogen in high density |
| CN101186408A (en) * | 2007-12-11 | 2008-05-28 | 南京大学 | Method for removing ammonia and nitrogen in garbage percolate |
| CN201240970Y (en) * | 2008-05-22 | 2009-05-20 | 茂名学院 | Integrated circulation biological reaction waste water treating device |
| CN101575140A (en) * | 2009-06-08 | 2009-11-11 | 清华大学 | Method for treating urban sewage with low carbon nitrogen ratio by using garbage percolate as carbon source |
-
2011
- 2011-08-31 CN CN201110254267XA patent/CN102951765A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020072360A (en) * | 2001-03-09 | 2002-09-14 | 주식회사 제일엔지니어링 | Biological Nitrogen Removal from Nitrogen-Rich Wastewaters by Partial Nitrification and Anaerobic Ammonium Oxidation |
| CN1493528A (en) * | 2003-08-29 | 2004-05-05 | 南化集团研究院 | Chemical precipitation method for treating ammonia nitrogen waste water |
| CN1872724A (en) * | 2006-06-21 | 2006-12-06 | 哈尔滨工业大学 | Pretreatment method for wastewater of ammonia nitrogen in high density |
| CN101186408A (en) * | 2007-12-11 | 2008-05-28 | 南京大学 | Method for removing ammonia and nitrogen in garbage percolate |
| CN201240970Y (en) * | 2008-05-22 | 2009-05-20 | 茂名学院 | Integrated circulation biological reaction waste water treating device |
| CN101575140A (en) * | 2009-06-08 | 2009-11-11 | 清华大学 | Method for treating urban sewage with low carbon nitrogen ratio by using garbage percolate as carbon source |
Non-Patent Citations (1)
| Title |
|---|
| 庞会从等: "化学沉淀-水解酸化-生物接触氧化-反渗透工艺处理垃圾渗滤液", 《环境工程学报》 * |
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Addressee: Tianjin Binhai Dingsheng Environmental Technology Engineering Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
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Application publication date: 20130306 |