CN105366871A - Processing method of landfill leachate - Google Patents
Processing method of landfill leachate Download PDFInfo
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- CN105366871A CN105366871A CN201410419754.0A CN201410419754A CN105366871A CN 105366871 A CN105366871 A CN 105366871A CN 201410419754 A CN201410419754 A CN 201410419754A CN 105366871 A CN105366871 A CN 105366871A
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Abstract
The invention belongs to the field of water processing technology, and concretely relates to a processing method of landfill leachate. The processing method combines an electrolysis technology, membrane treatment process and biological process together, and the method comprises the steps of homogenization in a regulating reservoir, micro-electrolytic catalytic oxidation, flocculation for the solid-liquid separation, removal of ammonia and nitrogen, anaerobic reaction, electro-Fenton reaction, membrane separation, nanofiltration and reverse osmosis treatment. The processing method improves the processing efficiency of landfill leachate, ensures the drainage quality to reach the standard, and performs re-treatment and repetitive cycle of the drainage of which quality dose not reach the standard, so that the emission standard is improved. The processing method has simple process, good processing effect and low processing cost, can remove the ammonia and nitrogen in the waste water with high efficiency, can reduce chroma of the waste water and content of the organic matter significantly.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to a kind of method for treating garbage percolation liquid.
Background technology
Along with the fast development of China's economy, urbanization process is constantly accelerated, municipal wastes output sharply increases, according to statistics, the municipal wastes annual production of current China is more than 1.4 hundred million tons, every year with about 10% speed increment, the amount military affairs that a large amount of municipal wastess gets over more than 90% are processed by the mode of landfill disposal.Percolate is rubbish due to the biochemical degradation such as compacting, fermentation in stacking and landfill process, while under the seepage effect of precipitation and underground water, produce a kind of liquid of high density organic or inorganic composition.
The water quality of percolate has following characteristics: (1) leachate quality is very complicated, not only containing oxygen consumption organic pollutant, also containing each metalloid and nutrient for plants (ammonia nitrogen etc.); (2) COD and BOD concentration is high, reaches as high as several ten thousand, far away higher than municipal effluent; (3) in percolate, organic pollutant category is many, wherein has non-chlorinated aromatics such as being difficult to biodegradable naphthalene, phenanthrene, chlorinated aromatic compounds of group, phosphoric acid ester, phthalic ester, phenolic compound and amino benzenes compounds etc.; (4) heavy metal content is large, the high and stench of colourity.
The treatment process of percolate has physico-chemical process and biological process, the process of current percolate mainly adopts biological process, comprise Aerobic biological process and anaerobic biological treatment, compared with aerobic method, anaerobic biological treatment has many advantages, most importantly less energy consumption, simple to operate, therefore investment and working cost cheap.In treating processes, material resources chemical method is the method that at present application is more ripe, but due to Financial cost high, easily causing secondary pollution, is more for pretreatment and advanced treatment.It is low that biological treatment has cost, and processing efficiency is high and to the advantage such as the secondary pollution of environment is little, is current hot research.But adopt separately a kind of single treatment process to be difficult to meet the demands, the combination process of multiple method must be adopted.
Summary of the invention
For solving the deficiencies in the prior art, the present invention aims to provide a kind of cost garbage leachate treatment process that is low, that electrolysis process, membrane treatment process and biochemical process are organically combined, get the chief of various treatment process, form a kind of ammonia nitrogen removal frank high, colourity, the treatment process that COD clearance is high, the method for treating garbage percolation liquid that the method is stable, adaptable to change of water quality, expense is low, processing efficiency is high.The present invention is achieved through the following technical solutions:
A kind of method for treating garbage percolation liquid, is characterized in that comprising the following steps:
(1) garbage leachate wastewater enters equalizing tank, homogeneous in equalizing tank;
(2) equalizing tank water outlet enters molecular micro-electrolysis catalyst oxidation reactor through waste water lifting pump, regulates ph to be 2.0-3.0, add 0.25% oxygenant simultaneously before reaction, reaction 2.5-3.5h;
(3) in step (2), water outlet flows into one mud, add sodium hydroxide, polymer alumina, polyacrylamide, lime carries out flocculating and solid-liquid separating, with sodium hydroxide, waste water ph is adjusted to 10-11 after solid-liquid separation, adds the solution ammonia agent Homogeneous phase mixing of 0.1% simultaneously;
(4) waste water of completing steps (3) pumps in ammonia nitrogen removal pond and carries out ammonia nitrogen removal, adds sulfuric acid after ammonia nitrogen removal, regulates pH to neutral;
(5) waste water in step (4) is carried out anaerobic reaction, anaerobic reaction adopts pulsed feeds mode interval to carry out, and every day is a recurrence interval, and flooding time is 2-3 hour, dry time that falls is 24-30h, and water inlet surface load is 0.03-0.13m
3/ (m
2d), in reaction process, temperature of reaction system is 30 DEG C-35 DEG C;
(6) waste water after the anaerobic reaction in step (5) is added Fenton reagent, waste liquid passes into the electric current of 1.0-1.5A, and the energising reaction times is 15-30min; Described Fenton reagent is copperas solution and hydrogen peroxide, ensures that iron concentration is 8-18mmol/L, hydrogen peroxide consumption and COD after wherein dropping into ferrous sulfate in reaction solution
cRmass concentration ratio be 1.5 ~ 2.5;
(7) reaction solution in step (6) carries out membrane sepn, nanofiltration and reverse-osmosis treated successively, can directly discharge after reaching emission standard, can not reach emission standard and enter anaerobic reaction and again process.
One of preferably, ensure that iron concentration is 10-15mmol/L, hydrogen peroxide consumption and COD after ferrous sulfate in step (6)
cRmass concentration ratio be 2.0.
Electrolysis process, membrane treatment process and biochemical process are combined into one by the present invention, improve the processing efficiency of percolate, ensure that displacement mass is up to standard, draining recirculation not up to standard are carried out secondary treatment simultaneously, improve emission standard.Present invention process process is simple, and treatment effect is good, and processing cost is low, can ammonia nitrogen in efficient removal waste water, significantly reduce chroma in waste water and organic content.
Embodiment
Below in conjunction with embodiment, the present invention will be further described; it is to be noted the following explanation being only the mode that exemplifies and the present invention is done; but protection scope of the present invention is not limited in this, the replacement of all those skilled in the art spirit according to the present invention to the equivalence that the present invention does all falls into protection scope of the present invention.
Embodiment 1
A kind of method for treating garbage percolation liquid, comprises the following steps:
(1) garbage leachate wastewater enters equalizing tank, homogeneous in equalizing tank;
(2) equalizing tank water outlet enters molecular micro-electrolysis catalyst oxidation reactor through waste water lifting pump, regulates pH to be 2.0, add 0.25% oxygenant simultaneously before reaction, reaction 3.5h;
(3) in step (2), water outlet flows into one mud, add sodium hydroxide, polymer alumina, polyacrylamide, lime carries out flocculating and solid-liquid separating, with sodium hydroxide, waste water ph is adjusted to 10 after solid-liquid separation, adds the solution ammonia agent Homogeneous phase mixing of 0.1% simultaneously;
(4) waste water of completing steps (3) pumps in ammonia nitrogen removal pond and carries out ammonia nitrogen removal, adds sulfuric acid after ammonia nitrogen removal, regulates pH to neutral;
(5) waste water in step (4) is carried out anaerobic reaction, anaerobic reaction adopts pulsed feeds mode interval to carry out, and every day is a recurrence interval, and flooding time is 2 hours, and the dry time that falls is 24h, and water inlet surface load is 0.03m
3/ (m
2d), in reaction process, temperature of reaction system is 30 DEG C;
(6) waste water after the anaerobic reaction in step (5) is added Fenton reagent, waste liquid passes into the electric current of 1.0A, and the energising reaction times is 15min; Described Fenton reagent is copperas solution and hydrogen peroxide, ensures that iron concentration is 8mmol/L, hydrogen peroxide consumption and COD after wherein dropping into ferrous sulfate in reaction solution
cRmass concentration ratio be 1.5;
(7) reaction solution in step (6) carries out membrane sepn, nanofiltration and reverse-osmosis treated successively, can directly discharge after reaching emission standard, can not reach emission standard and enter anaerobic reaction and again process.
Embodiment 2
A kind of method for treating garbage percolation liquid, is characterized in that comprising the following steps:
(1) garbage leachate wastewater enters equalizing tank, homogeneous in equalizing tank;
(2) equalizing tank water outlet enters molecular micro-electrolysis catalyst oxidation reactor through waste water lifting pump, regulates ph to be 3.0, add 0.25% oxygenant simultaneously before reaction, reaction 2.5h;
(3) in step (2), water outlet flows into one mud, add sodium hydroxide, polymer alumina, polyacrylamide, lime carries out flocculating and solid-liquid separating, with sodium hydroxide, waste water ph is adjusted to 11 after solid-liquid separation, adds the solution ammonia agent Homogeneous phase mixing of 0.1% simultaneously;
(4) waste water of completing steps (3) pumps in ammonia nitrogen removal pond and carries out ammonia nitrogen removal, adds sulfuric acid after ammonia nitrogen removal, regulates pH to neutral;
(5) waste water in step (4) is carried out anaerobic reaction, anaerobic reaction adopts pulsed feeds mode interval to carry out, and every day is a recurrence interval, and flooding time is 3 hours, and the dry time that falls is 30h, and water inlet surface load is 0.1m
3/ (m
2d), in reaction process, temperature of reaction system is 35 DEG C;
(6) waste water after the anaerobic reaction in step (5) is added Fenton reagent, waste liquid passes into the electric current of 1.5A, and the energising reaction times is 30min; Described Fenton reagent is copperas solution and hydrogen peroxide, ensures that iron concentration is 18mmol/L, hydrogen peroxide consumption and COD after wherein dropping into ferrous sulfate in reaction solution
cRmass concentration ratio be 2.5;
(7) reaction solution in step (6) carries out membrane sepn, nanofiltration and reverse-osmosis treated successively, can directly discharge after reaching emission standard, can not reach emission standard and enter anaerobic reaction and again process.
Embodiment 3
A kind of method for treating garbage percolation liquid, is characterized in that comprising the following steps:
(1) garbage leachate wastewater enters equalizing tank, homogeneous in equalizing tank;
(2) equalizing tank water outlet enters molecular micro-electrolysis catalyst oxidation reactor through waste water lifting pump, regulates ph to be 2.5, add 0.25% oxygenant simultaneously before reaction, reaction 3.0h;
(3) in step (2), water outlet flows into one mud, add sodium hydroxide, polymer alumina, polyacrylamide, lime carries out flocculating and solid-liquid separating, with sodium hydroxide, waste water ph is adjusted to 10.5 after solid-liquid separation, adds the solution ammonia agent Homogeneous phase mixing of 0.1% simultaneously;
(4) waste water of completing steps (3) pumps in ammonia nitrogen removal pond and carries out ammonia nitrogen removal, adds sulfuric acid after ammonia nitrogen removal, regulates pH to neutral;
(5) waste water in step (4) is carried out anaerobic reaction, anaerobic reaction adopts pulsed feeds mode interval to carry out, and every day is a recurrence interval, and flooding time is 2.5 hours, and the dry time that falls is 28h, and water inlet surface load is 0.13m
3/ (m
2d), in reaction process, temperature of reaction system is 33 DEG C;
(6) waste water after the anaerobic reaction in step (5) is added Fenton reagent, waste liquid passes into the electric current of 1.3A, and the energising reaction times is 25min; Described Fenton reagent is copperas solution and hydrogen peroxide, ensures that iron concentration is 10mmol/L, the mass concentration ratio of hydrogen peroxide consumption and CODCR is 2.0 after wherein dropping into ferrous sulfate in reaction solution;
(7) reaction solution in step (6) carries out membrane sepn, nanofiltration and reverse-osmosis treated successively, can directly discharge after reaching emission standard, can not reach emission standard and enter anaerobic reaction and again process.
Claims (2)
1. a method for treating garbage percolation liquid, is characterized in that comprising the following steps:
(1) garbage leachate wastewater enters equalizing tank, homogeneous in equalizing tank;
(2) equalizing tank water outlet enters molecular micro-electrolysis catalyst oxidation reactor through waste water lifting pump, regulates ph to be 2.0-3.0, add 0.25% oxygenant simultaneously before reaction, reaction 2.5-3.5h;
(3) in step (2), water outlet flows into one mud, add sodium hydroxide, polymer alumina, polyacrylamide, lime carries out flocculating and solid-liquid separating, with sodium hydroxide, waste water ph is adjusted to 10-11 after solid-liquid separation, adds the solution ammonia agent Homogeneous phase mixing of 0.1% simultaneously;
(4) waste water of completing steps (3) pumps in ammonia nitrogen removal pond and carries out ammonia nitrogen removal, adds sulfuric acid after ammonia nitrogen removal, regulates pH to neutral;
(5) waste water in step (4) is carried out anaerobic reaction, anaerobic reaction adopts pulsed feeds mode interval to carry out, and every day is a recurrence interval, and flooding time is 2-3 hour, dry time that falls is 24-30h, and water inlet surface load is 0.03-0.13m
3/ (m
2d), in reaction process, temperature of reaction system is 30 DEG C-35 DEG C;
(6) waste water after the anaerobic reaction in step (5) is added Fenton reagent, waste liquid passes into the electric current of 1.0-1.5A, and the energising reaction times is 15-30min; Described Fenton reagent is copperas solution and hydrogen peroxide, ensures that iron concentration is 8-18mmol/L, hydrogen peroxide consumption and COD after wherein dropping into ferrous sulfate in reaction solution
cRmass concentration ratio be 1.5 ~ 2.5;
(7) reaction solution in step (6) carries out membrane sepn, nanofiltration and reverse-osmosis treated successively, can directly discharge after reaching emission standard, can not reach emission standard and enter anaerobic reaction and again process.
2. a kind of method for treating garbage percolation liquid as claimed in claim 1, is characterized in that ensureing that iron concentration is 10-15mmol/L, hydrogen peroxide consumption and COD after ferrous sulfate in step (6)
cRmass concentration ratio be 2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419754.0A CN105366871A (en) | 2014-08-20 | 2014-08-20 | Processing method of landfill leachate |
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| CN201410419754.0A CN105366871A (en) | 2014-08-20 | 2014-08-20 | Processing method of landfill leachate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106167333A (en) * | 2016-07-27 | 2016-11-30 | 武汉都市环保工程技术股份有限公司 | Refuse transfer station leachate collection and processing method |
| CN106892540A (en) * | 2017-04-18 | 2017-06-27 | 郑辉 | The zero-discharge treatment system and method for a kind of garbage-compressing liquid |
| CN107961589A (en) * | 2017-10-28 | 2018-04-27 | 江苏维尔利环保科技股份有限公司 | Landfill leachate film-filter concentration liquid three changes processing method |
| CN108726741A (en) * | 2018-06-14 | 2018-11-02 | 天津市尚拓环保科技有限公司 | Mature landfill leachate processing system and processing method |
| CN109761416A (en) * | 2019-03-07 | 2019-05-17 | 山东泰禾环保科技股份有限公司 | Garbage leachate treatment process and its processing unit |
-
2014
- 2014-08-20 CN CN201410419754.0A patent/CN105366871A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106167333A (en) * | 2016-07-27 | 2016-11-30 | 武汉都市环保工程技术股份有限公司 | Refuse transfer station leachate collection and processing method |
| CN106892540A (en) * | 2017-04-18 | 2017-06-27 | 郑辉 | The zero-discharge treatment system and method for a kind of garbage-compressing liquid |
| CN107961589A (en) * | 2017-10-28 | 2018-04-27 | 江苏维尔利环保科技股份有限公司 | Landfill leachate film-filter concentration liquid three changes processing method |
| CN108726741A (en) * | 2018-06-14 | 2018-11-02 | 天津市尚拓环保科技有限公司 | Mature landfill leachate processing system and processing method |
| CN109761416A (en) * | 2019-03-07 | 2019-05-17 | 山东泰禾环保科技股份有限公司 | Garbage leachate treatment process and its processing unit |
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Application publication date: 20160302 |