CN104986921A - Combined technological method for landfill leachate treatment - Google Patents
Combined technological method for landfill leachate treatment Download PDFInfo
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- CN104986921A CN104986921A CN201510393304.3A CN201510393304A CN104986921A CN 104986921 A CN104986921 A CN 104986921A CN 201510393304 A CN201510393304 A CN 201510393304A CN 104986921 A CN104986921 A CN 104986921A
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- landfill leachate
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Abstract
The invention relates to a combined technological method for landfill leachate treatment. The combined technological method for the landfill leachate treatment mainly comprises the steps that firstly landfill leachate is pumped in a water quality balancing tank to adjust water quality and water quantity; then coagulating sedimentation pretreatment is conducted after the landfill leachate entering a coagulating precipitation tank, part of organic matters, SS and metal ions in the landfill leachate are removed; then effluent after being treated enters an MBR membrane bioreactor; the MBR membrane bioreactor comprises a first-grade or second-grade A/O and a built-in type MBR membrane treatment device; a plenty of pollutants like organic matters, ammonia nitrogen, the metal ions, TDS and the like in the landfill leachate are all removed in this stage; the effluent of the MBR membrane bioreactor enters a disk-tube type reverse osmosis (DTRO) system, the pollutants which cannot be removed by the MBR membrane bioreactor further are concentrated and enter concentrated solution, and permeate liquid can reach an emission standard. Compared with an external type MBR+NF/RO technology, the combined technological method for the landfill leachate treatment has the advantages of being lower in running cost and higher in water production rate under the premise that the emission standard is reached.
Description
Technical field
The present invention relates to the landfill leachate treatment field of urban refuse sanitary landfill, garbage incinerating power plant, garbage transfer station etc., be specifically related to a kind of combination process for the treatment of refuse percolate.
Background technology
Percolate is rubbish due to the biochemical degradation such as compacting, fermentation in stacking and landfill process, while a kind of liquid of high density organic or inorganic composition that produces under the seepage effect of precipitation and underground water.At present, the process of percolate mainly adopts the combination process of " pre-treatment+external placed type MBR film biosystem+nanofiltration/reverse osmosis advanced process ", external placed type MBR operating performance is stablized, easy to maintenance, but working cost is higher, it is 10 times more than of built-in MBR working cost, and nanofiltration cannot to monovalent salt and ammonia nitrogen effectively catching, need connect with reverse osmosis, cause the producing water ratio of system low, produce a large amount of concentrated solution, at present, a lot of landfill yard or incineration plant have not allowed Concentrated liquid recharge landfill yard or have returned spray incineration plant, need by concentrated solution individual curing.Therefore, a large amount of concentrated solution can increase the running cost of whole system, increases intractability.
Summary of the invention
Based on above-mentioned prior art Problems existing, the invention provides a kind of combined technical method for the treatment of refuse percolate, this technical process is simple, stable, and compared to the prior art, energy consumption and running cost reduce all greatly.
For solving the problems of the technologies described above, the invention provides a kind of combined technical method for the treatment of refuse percolate, comprising:
Step I, passes into water quality balancing tank by percolate, the regulating water quality water yield;
Step I i, the water outlet of water quality balancing tank enters coagulative precipitation tank and carries out coagulating sedimentation pre-treatment, removes partial organic substances in percolate, SS and metal ion;
Step I ii, pretreated water outlet enters MBR membrane bioreactor, to remove in percolate the pollution substances such as most organism, ammonia nitrogen, metal ion, TDS;
The water outlet of step I v, MBR membrane bioreactor enters disc tube reverse osmosis (dt-ro) system, and the pollutent cannot removed by membrane bioreactor is concentrated further to be entered in concentrated solution, and permeate reaches emission standard.
In above-mentioned water quality balancing tank, chemicals dosing plant and whipping appts being installed, by adding the pH value of acid-alkali accommodation percolate, by stirring, percolate being mixed.
Above-mentioned coagulating sedimentation coagulating agent used is at least one inorganic flocculating agent in aluminum chloride, iron(ic) chloride, Tai-Ace S 150, ferric sulfate, polymerize aluminum chloride, bodied ferric sulfate, aluminium iron polychloride and polyacrylamide organic polymer coargulator.
Described MBR membrane bioreactor adopts one-level or secondary A/O system, and MBR membrane separation plant, and the MBR membrane module of described MBR membrane separation plant is installed in film groove, facilitates clean and maintenance.
The operating pressure of above-mentioned disc tube reverse osmosis (dt-ro) (DTRO) system is 90-120bar.
The present invention is compared with the combination process of existing " pre-treatment+external placed type MBR film biosystem+NF/RO advanced treatment ", the present invention has the following advantages: the combination process adopting " pre-treatment+built-in MBR film biosystem+DTRO ", built-in MBR membrane separation unit working cost is lower, MBR membrane module is installed in film groove, facilitates clean and maintenance.DTRO is compared with traditional NF/RO, and producing water ratio is higher, and the concentrated solution of generation is less.Compared with traditional technique, this combination process running cost is lower, and processing efficiency is higher.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Fig. 1 is process flow sheet of the present invention.
Embodiment
Figure 1 shows that the process flow sheet of the combined technical method of a kind for the treatment of refuse percolate provided by the invention, concrete implementation step is as follows:
1, first by percolate by pump suction water quality balancing tank, the regulating water quality water yield.In water quality balancing tank, chemicals dosing plant being installed, by adding the pH value of acid-alkali accommodation percolate, and by whipping appts, percolate being mixed.
2, the water outlet of water quality balancing tank enters coagulative precipitation tank and carries out coagulating sedimentation, removes partial organic substances in percolate, SS and metal ion.This coagulation system comprises coagulating agent preparation and throwing device, whipping appts, settlers etc., dosing coagulant is at least one inorganic flocculating agent in aluminum chloride, iron(ic) chloride, Tai-Ace S 150, ferric sulfate, polymerize aluminum chloride, bodied ferric sulfate, aluminium iron polychloride and polyacrylamide organic polymer coargulator.
3, the water outlet after coagulating sedimentation enters MBR membrane bioreactor, and MBR membrane bioreactor comprises one-level or secondary A/O and built-in MBR membrane treatment appts, to remove in percolate the pollution substances such as most organism, ammonia nitrogen, metal ion, TDS.MBR membrane separation plant adopts built-in MBR, MBR membrane module to be installed in film groove, facilitates clean and maintenance.
4, the water outlet of MBR membrane bioreactor enters disc tube reverse osmosis (dt-ro) (DTRO) system, disc tube reverse osmosis (dt-ro) (DTRO) system comprises strainer, main pump, disc tube reverse osmosis (dt-ro) film column assembly, degas system and adds acid system etc., system running pressure 90-120bar, the pollutent cannot removed by membrane bioreactor is concentrated further to be entered in concentrated solution, and permeate can reach emission standard.
Hinge structure, the present invention is the brand-new combination process treatment process of a kind of contriver original creation, adopt the combination process of " pre-treatment+built-in MBR film biosystem+DTRO ", built-in MBR membrane separation unit working cost is lower, MBR membrane module is installed in film groove, facilitates clean and maintenance.DTRO is compared with traditional NF/RO, and producing water ratio is higher, and the concentrated solution of generation is less.Through practice test, compared with traditional technique, combined technical method running cost of the present invention is low by 40%, and processing efficiency is high by 22%.
Should be noted that; the exemplary illustration that this embodiment is just done the present invention and do not limit its protection domain; those skilled in the art can also make the change of some unsubstantialities to the present invention; as long as without creative work to the improvement that this patent carries out, all within the protection domain of this patent.
Claims (6)
1. a combined technical method for treating refuse percolate, is characterized in that, comprises the following steps:
Step I, passes into water quality balancing tank by percolate, the regulating water quality water yield;
Step I i, the water outlet of water quality balancing tank enters coagulative precipitation tank and carries out coagulating sedimentation pre-treatment, removes partial organic substances in percolate, SS and metal ion;
Step I ii, pretreated water outlet enters MBR membrane bioreactor, to remove in percolate the pollution substances such as most organism, ammonia nitrogen, metal ion, TDS;
The water outlet of step I v, MBR membrane bioreactor enters disc tube reverse osmosis (dt-ro) system, and the pollutent cannot removed by membrane bioreactor is concentrated further to be entered in concentrated solution, and permeate reaches emission standard.
2. the combined technical method for the treatment of refuse percolate according to claim 1, is characterized in that, in step I, is provided with whipping appts in described water quality balancing tank, by stirring, percolate is mixed.
3. the combined technical method for the treatment of refuse percolate according to claim 1, is characterized in that, in step I, is provided with chemicals dosing plant, is added the pH value of acid-alkali accommodation percolate by chemicals dosing plant in described water quality balancing tank.
4. the combined technical method for the treatment of refuse percolate according to claim 1, it is characterized in that, in step I i, described coagulating sedimentation coagulating agent used is at least one inorganic flocculating agent in aluminum chloride, iron(ic) chloride, Tai-Ace S 150, ferric sulfate, polymerize aluminum chloride, bodied ferric sulfate, aluminium iron polychloride and polyacrylamide organic polymer coargulator.
5. according to the combined technical method for the treatment of refuse percolate according to claim 1, it is characterized in that, in step I ii, described MBR membrane bioreactor adopts one-level or secondary A/O system, and MBR membrane separation plant, the MBR membrane module of described MBR membrane separation plant is installed in film groove.
6., according to the combined technical method for the treatment of refuse percolate according to claim 1, it is characterized in that, in step I v, the operating pressure 90-120bar of described disc tube reverse osmosis (dt-ro) system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393304.3A CN104986921A (en) | 2015-07-07 | 2015-07-07 | Combined technological method for landfill leachate treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510393304.3A CN104986921A (en) | 2015-07-07 | 2015-07-07 | Combined technological method for landfill leachate treatment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109851150A (en) * | 2018-12-17 | 2019-06-07 | 北京航天环境工程有限公司 | A kind of processing system and application of consumer waste landfill percolate |
| CN111470731A (en) * | 2020-04-26 | 2020-07-31 | 厦门嘉戎技术股份有限公司 | Method and system for treating leachate of refuse landfill |
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| JP2012125726A (en) * | 2010-12-17 | 2012-07-05 | Kajima Corp | Leachate treatment system |
| CN102795746A (en) * | 2012-08-24 | 2012-11-28 | 新源（中国）环境科技有限责任公司 | Treatment method for waste incineration power plant leachate and device thereof |
| JP2014014738A (en) * | 2012-07-06 | 2014-01-30 | Swing Corp | Method and apparatus for treating organic wastewater |
| CN204174044U (en) * | 2014-08-07 | 2015-02-25 | 唐山曹妃甸海清源科技有限公司 | Landfill leachate treatment and recycling system |
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2015
- 2015-07-07 CN CN201510393304.3A patent/CN104986921A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012125726A (en) * | 2010-12-17 | 2012-07-05 | Kajima Corp | Leachate treatment system |
| JP2014014738A (en) * | 2012-07-06 | 2014-01-30 | Swing Corp | Method and apparatus for treating organic wastewater |
| CN102795746A (en) * | 2012-08-24 | 2012-11-28 | 新源（中国）环境科技有限责任公司 | Treatment method for waste incineration power plant leachate and device thereof |
| CN204174044U (en) * | 2014-08-07 | 2015-02-25 | 唐山曹妃甸海清源科技有限公司 | Landfill leachate treatment and recycling system |
Non-Patent Citations (1)
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| 高斌等: "MBR/DTRO工艺用于中老龄垃圾填埋场渗滤液处理", 《中国给水排水》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109851150A (en) * | 2018-12-17 | 2019-06-07 | 北京航天环境工程有限公司 | A kind of processing system and application of consumer waste landfill percolate |
| CN111470731A (en) * | 2020-04-26 | 2020-07-31 | 厦门嘉戎技术股份有限公司 | Method and system for treating leachate of refuse landfill |
| CN111470731B (en) * | 2020-04-26 | 2022-11-25 | 厦门嘉戎技术股份有限公司 | Method and system for treating leachate of refuse landfill |
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Application publication date: 20151021 |