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Landfill leachate treatment method and system

A technology of landfill leachate and treatment method, applied in the field of environmental protection, can solve the problems of secondary pollution, large fluctuation of treatment volume, frequent replacement, etc., to achieve the effect of reducing COD and ammonia nitrogen, and low investment and operation cost

Inactive Publication Date: 2017-10-24
格丰科技材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the maintenance and replacement of membrane modules are frequent, difficult to clean, easy to clog, large fluctuations in processing capacity, and high operating costs. At the same time, the concentrated water generated by membrane treatment is difficult to treat and is prone to secondary pollution.

Method used

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  • Landfill leachate treatment method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Pilot test of landfill leachate in Pingxiang, Jiangxi, raw water COD cr It is about 4000mg / L, the flocculant PAC is 150mg / L, PAM is 2mg / L, and the surface load of the primary reaction sedimentation tank is 0.5m 3 / m 2 h, the hydraulic retention time is 4h, and then the pH is adjusted to 3.0 before entering the iron-carbon micro-electrolysis reaction tower, in which the iron-carbon filler volume is 0.8 to 1.5 times the unit influent volume, and the surface load is 0.35m 3 / m 2 h, the hydraulic retention time is 1.5h, adjust the pH of the micro-electrolysis reaction water to 6.0, enter the secondary reaction sedimentation tank, and the surface load of the secondary reaction sedimentation tank is 0.5m 3 / m 2 h, PAM is 2mg / L, hydraulic retention time 4h, imports pre-acidification tank afterwards, pre-acidification time 4h, adjusts waste water pH value to about 7 and pumps into anaerobic reactor, the anaerobic reactor that the present embodiment adopts is UASB (upflow mu...

Embodiment 2

[0054] A pilot test study was carried out on the landfill leachate in Pingxiang, Jiangxi. The raw water CODcr is about 7000mg / L, the flocculant PAC is 350mg / L, and the PAM is 5mg / L. The surface load of the primary reaction sedimentation tank is 1m 3 / m 2 h, after adjusting the pH to 3.0, enter the iron-carbon micro-electrolysis reaction tower, in which the iron-carbon filler volume is 0.8 to 1.5 times the unit influent volume, and the surface load is 0.35m 3 / m 2 h, the hydraulic retention time is 1.5h, adjust the pH of the micro-electrolysis reaction water to 6.0, enter the secondary reaction sedimentation tank, and the surface load of the secondary reaction sedimentation tank is 0.5m 3 / m 2 h, PAM is 2mg / L, hydraulic retention time 4h, imports pre-acidification tank afterwards, pre-acidification time 4h, adjusts waste water pH value to about 7 and pumps into anaerobic reactor, the anaerobic reactor that the present embodiment adopts is UASB (upflow multi-stage anaerobic r...

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Abstract

The invention discloses a landfill leachate treatment method and system. The treatment method comprises the following steps: removing impurities from leachate waste water by using suspending particular matters; then successively carrying out biochemical treatment, catalytic and oxidative treatment and heavy metal adsorption treatment; and then standing and discharging. A biological and biochemical technology is used on a biological treatment part, a catalytic ozonation technology and a heavy metal adsorption technology are used on a deeply oxidative treatment part, COD, ammonia nitrogen and heavy metal are further reduced, after deeply treatment is carried out, a concentrated solution is not produced, and secondary pollution does not exist.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a treatment method and system for landfill leachate. Background technique [0002] The commonly used treatment methods for landfill leachate are: biological method, chemical oxidation method, flocculation sedimentation method, recharge method, artificial wetland method, etc. Compared with the early landfill leachate, middle-aged landfill leachate has the following characteristics: (1) The amount of leachate produced is significantly affected by climate and seasonal changes, especially in the rainy season; (2) The composition is complex, and the organic matter that is difficult to biodegrade accounts for more than 70% of the total organic components in the leachate; (3) Poor biodegradability, BOD 5 / COD cr The value is generally less than 0.15; (4) The high concentration of ammonia nitrogen has a toxic effect on microorganisms, resulting in an imbala...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/281C02F1/283C02F1/461C02F1/5236C02F1/56C02F1/66C02F1/725C02F1/78C02F3/1268C02F3/28C02F3/2846C02F3/286C02F3/30C02F9/00
Inventor 邱根萍宁小飞奉向东曾欠鹏
Owner 格丰科技材料有限公司
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