CN102775013A - Method for treating high concentration ammonia nitrogen in landfill leachate wastewater - Google Patents
Method for treating high concentration ammonia nitrogen in landfill leachate wastewater Download PDFInfo
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- CN102775013A CN102775013A CN2012102533887A CN201210253388A CN102775013A CN 102775013 A CN102775013 A CN 102775013A CN 2012102533887 A CN2012102533887 A CN 2012102533887A CN 201210253388 A CN201210253388 A CN 201210253388A CN 102775013 A CN102775013 A CN 102775013A
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- landfill leachate
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Abstract
The invention discloses a method for treating high concentration ammonia nitrogen in landfill leachate wastewater. The method mainly includes the steps of adding slaked lime into the landfill leachate wastewater, discharging supernatant out of an aeration tank after precipitation, adding sucrose, alcohol, methanol and a sodium hypochlorite solution sequentially to maintain dissolved oxygen in the wastewater between 2.0mg/L and 2.5mg/L, and stopping aeration; and mixing a nitration solution with landfill leachate after flocculent precipitation in the same volume, adjusting the pH with sulfuric acid, heating the mixed wastewater to the temperature of 65-75 DEG C for 5-6 hours, and discharging the landfill leachate wastewater with the ammonia nitrogen content lower than 0.2mg/L. According to the method, carbon sources are supplemented after the flocculent precipitation and react with the high concentration ammonia nitrogen in the landfill leachate wastewater to convert into nitrogen for discharging under the acidic condition, no precipitation and sludge are produced, secondary pollution risks are avoided, and the removing rate of the ammonia nitrogen reaches above 99.8%.
Description
Technical field
The present invention relates to a kind of treating refuse percolate waste water middle and high concentration ammonia nitrogen method, belong to sewage treatment area.
Background technology
Percolate is in filling out reason stacking process because the Decomposition of mikrobe and receive drip washing and the surface water of rainwater and the high concentrated organic wastewater that phreatic long period of soaking produces; Ammonia nitrogen concentration generally is higher than 1000mg/L; COD concentration is generally 5000～50000mg/L; Cause the C/N ratio imbalance, influence biochemical effect.
In order to improve carbon, nitrogen ratio; General through adding organic method such as methyl alcohol, but since in the waste water mikrobe increase required organic kind and differing most in period in difference, directly have influence on the nitrification effect of ammonia nitrogen in the waste water; As excessive increase organism amount simply; Finally with the form discharging of nitrate salt or nitrite, total nitrogen does not still obtain removing ammonia nitrogen in the waste water, and is obvious to the harm of natural water so.
Summary of the invention
In order to solve in treating refuse percolate process, the excessive organism that adds causes that ammonia nitrogen finally exists with nitrate salt, nitrite form in the waste water, and total nitrogen still and do not remove; But organism increases this problem, is to provide a kind of treating refuse percolate waste water middle and high concentration ammonia nitrogen method, and this method is through being directed against the characteristic of mikrobe different time sections in the waste water behind the flocculation sediment; Add different carbon sources successively, under the tart condition, be directly changed into nitrogen with the reaction of percolate waste water middle and high concentration ammonia nitrogen and discharge; Both do not had deposition and do not had the mud generation yet, avoided the secondary pollution risk, simple to operate; Cost is low, and ammonia nitrogen removal frank is up to more than 99.8%.
To achieve these goals, the concrete technical scheme taked of the present invention is:
(1) in waste water, add white lime, produce the flocculation PM for particulate matter, deposition, supernatant enters the aeration tank;
(2) in the aeration tank, add sucrose, alcohol, methyl alcohol, Youxiaolin successively;
(3) oxygenic aeration is 5～6 hours, makes that dissolved oxygen maintains 2.0～2.5mg/L in the waste water;
(4) stopping aeration, is that 1: 1 equal-volume mixes with percolate behind the first step flocculation sediment by volume, and using sulfuric acid to regulate its pH value is 5.1～5.3;
(5) mixed waste water is warming up to 65 ℃～75 ℃, reacted 5～6 hours, get final product.
The said amount that in the aeration tank, adds sucrose, alcohol, methyl alcohol, Youxiaolin successively is respectively multitudinous sugared 3～5kg in waste water per ton, alcohol 4～6kg, methyl alcohol 3～4kg, Youxiaolin 1.0～1.5kg.
Institute's high-concentration ammonia nitrogenous wastewater is a percolate waste water.
The invention has the beneficial effects as follows:
(1) to the characteristic of mikrobe different time sections in the percolate waste water, adding sucrose, alcohol, methyl alcohol, chlorine bleach liquor successively, different carbon source is replenished;
(2) behind the aeration with flocculation sediment after the percolate equal-volume mix; Under the tart condition, nitrite, nitrate salt and the reaction of percolate waste water middle and high concentration ammonia nitrogen directly become nitrogen discharge in air; Both do not had deposition and mud and produced, avoided the secondary pollution risk problem yet;
(3) used waste water and waste water directly to carry out redox, low excessively to organic content in the percolate waste water, be directly changed into nitrogen to percolate waste water middle and high concentration ammonia nitrogen and discharge.
Specific embodiments
Earlier in percolate waste water, add white lime, produce the flocculation PM for particulate matter, deposition after supernatant enters the aeration tank, adds successively in waste water 3～5kg sucrose per ton, 4～6kg and spills essence, 3～4kg methyl alcohol, 1.0～1.5kg chlorine bleach liquor; Oxygenic aeration is 5～6 hours then, makes that dissolved oxygen maintains 2.0～2.5mg/L in the waste water, stops aeration; Is the percolate behind nitrification liquid and the first step flocculation sediment that 1: 1 equal-volume mixes by volume, and using sulfuric acid to regulate its pH value is 5.1～5.3; At last mixed waste water is warming up to 65 ℃～75 ℃, reacted 5～6 hours, survey ammonia-nitrogen content in the percolate waste water of discharging.
Embodiment 1
Getting certain refuse landfill ammonia nitrogen concentration is the percolate waste water 4000kg of 3000mg/L, adds 8kg white lime to waste water, stirs and produces flocculation PM for particulate matter deposition after 1.5 hours; Then get and add 12kg sucrose after its supernatant enters the aeration tank; Aeration adds 24kg alcohol after 1 hour, aeration adds 16kg methyl alcohol after 2.5 hours, and aeration adds the 6kg chlorine bleach liquor and carried out aeration 1 hour after 1.5 hours; Make that dissolved oxygen maintains 2.5mg/L in the waste water, stop aeration; Is the percolate behind nitrification liquid and the first step flocculation sediment that 1: 1 equal-volume mixes by volume, and using sulfuric acid to regulate its pH value is 5.3; At last mixed waste water is warming up to 75 ℃, reacted 6 hours, record that ammonia nitrogen concentration drops to 0.2mg/L in the percolate waste water of discharge, clearance is up to 99.8%.
Embodiment 2
Getting certain chemical plant ammonia nitrogen concentration is the percolate waste water 2000kg of 2000mg/L, adds 6kg white lime to waste water, stirs after 1 hour, produces flocculation PM for particulate matter deposition; Then get and add 6kg sucrose after its supernatant enters the aeration tank; Aeration adds 8kg alcohol after 1.5 hours, aeration adds 8kg methyl alcohol after 1 hour, and aeration adds the 2.4kg Youxiaolin and carried out aeration 1.5 hours after 1 hour; Make that dissolved oxygen maintains 2.2mg/L in the waste water, stop aeration; Is the percolate behind nitrification liquid and the first step flocculation sediment that 1: 1 equal-volume mixes by volume, and using sulfuric acid to regulate its pH value is 5.1; At last mixed waste water is warming up to 65 ℃, reacted 6 hours, record the percolate ammonia nitrogen in waste water and drop to 0.1mg/L, clearance is up to 99.9%.
Embodiment 3
Getting certain chemical plant ammonia nitrogen concentration is the percolate waste water 3000kg of 2800mg/L, adds 5kg white lime to waste water, stirs after 1 hour, produces flocculation PM for particulate matter deposition; Then get and add 12kg sucrose after its supernatant enters the aeration tank, aeration adds 15kg after 1 hour and spills essence, and aeration adds 12kg methyl alcohol after 2 hours, and aeration adds the 3.9kg Youxiaolin and carried out aeration 1 hour after 1 hour, makes that dissolved oxygen maintains 2.3mg/L in the waste water; Stop aeration; Is the percolate behind nitrification liquid and the first step flocculation sediment that 1: 1 equal-volume mixes by volume, and using sulfuric acid to regulate its pH value is 5.2; At last mixed waste water is warming up to 70 ℃, reacted 5 hours, ammonia nitrogen drops to 0.2mg/L in the survey percolate waste water, and clearance is up to 99.8%.
Claims (3)
1. treating refuse percolate waste water middle and high concentration ammonia nitrogen method is characterized in that:
(1) in waste water, add white lime, produce the flocculation PM for particulate matter, deposition, supernatant enters the aeration tank;
(2) in the aeration tank, add sucrose, alcohol, methyl alcohol, Youxiaolin successively;
(3) oxygenic aeration is 5～6 hours, makes that dissolved oxygen maintains 2.0～2.5mg/L in the waste water;
(4) stopping aeration, is that 1: 1 equal-volume mixes with percolate behind the first step flocculation sediment by volume, and using sulfuric acid to regulate its pH value is 5.1～5.3;
(5) mixed waste water is warming up to 65 ℃～75 ℃, reacted 5～6 hours, get final product.
2. according to the said a kind of treating refuse percolate waste water middle and high concentration ammonia nitrogen method of claim 1; It is characterized in that: the said amount that in the aeration tank, adds sucrose, alcohol, methyl alcohol, Youxiaolin successively is in waste water per ton; Be respectively sucrose 3～5kg; Alcohol 4～6kg, methyl alcohol 3～4kg, Youxiaolin 1.0～1.5kg.
3. according to the said a kind of treating refuse percolate waste water middle and high concentration ammonia nitrogen method of claim 1, it is characterized in that: said high-concentration ammonia nitrogenous wastewater is a percolate waste water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102533887A CN102775013A (en) | 2012-07-18 | 2012-07-18 | Method for treating high concentration ammonia nitrogen in landfill leachate wastewater |
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| CN2012102533887A CN102775013A (en) | 2012-07-18 | 2012-07-18 | Method for treating high concentration ammonia nitrogen in landfill leachate wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573985A (en) * | 2020-05-27 | 2020-08-25 | 四川省工业环境监测研究院 | Waste water treatment method for garbage penetrating fluid treatment |
Citations (4)
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| JPH0275995A (en) * | 1988-09-12 | 1990-03-15 | Toshiba Corp | Fuel assembly |
| JPH0975995A (en) * | 1995-09-19 | 1997-03-25 | Hitachi Ltd | Removing system of high concentration ammonia nitrogen |
| CN201713417U (en) * | 2010-06-22 | 2011-01-19 | 哈尔滨工业大学深圳研究生院 | Aeration biological filter pool device for efficiently denitrifying and dephosphorizing |
| CN102329057A (en) * | 2011-09-09 | 2012-01-25 | 杭州江南科学研究院有限公司 | Method for treating high concentration ammonia nitrogen landfill leachate |
-
2012
- 2012-07-18 CN CN2012102533887A patent/CN102775013A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0275995A (en) * | 1988-09-12 | 1990-03-15 | Toshiba Corp | Fuel assembly |
| JPH0975995A (en) * | 1995-09-19 | 1997-03-25 | Hitachi Ltd | Removing system of high concentration ammonia nitrogen |
| CN201713417U (en) * | 2010-06-22 | 2011-01-19 | 哈尔滨工业大学深圳研究生院 | Aeration biological filter pool device for efficiently denitrifying and dephosphorizing |
| CN102329057A (en) * | 2011-09-09 | 2012-01-25 | 杭州江南科学研究院有限公司 | Method for treating high concentration ammonia nitrogen landfill leachate |
Non-Patent Citations (1)
| Title |
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| 王丽丽 等: "不同碳源及其碳氮比对反硝化过程的影响", 《环境保护科学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573985A (en) * | 2020-05-27 | 2020-08-25 | 四川省工业环境监测研究院 | Waste water treatment method for garbage penetrating fluid treatment |
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Application publication date: 20121114 |