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Method and system for treating landfill leachate

A landfill leachate and treatment method technology, which is applied in the direction of contaminated groundwater/leachate treatment, infiltration/dialysis water/sewage treatment, chemical instruments and methods, etc., can solve the problem of high treatment cost, long process flow, and occupied area Major and other issues

Active Publication Date: 2011-08-31
BEIJING BIOTECHINA ENVIRONMENT CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, biochemical processes such as oxidation ditch, SBR, and MSBR are used to treat landfill leachate, but the effluent is difficult to meet the first-level discharge standard, and it occupies a large area, the process is long, and the treatment cost is high.

Method used

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  • Method and system for treating landfill leachate
  • Method and system for treating landfill leachate
  • Method and system for treating landfill leachate

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Embodiment

[0026] The leachate treatment of a landfill site adopts the method and system of the present invention. The total water volume is designed to be 1000t / d, and it is designed to operate continuously for 24 hours a day. The water flow rate of the membrane treatment unit is 41.7m 3 / h; the water flow rate of the wet catalytic oxidation treatment unit is 8.4m 3 / h;

[0027] 1 Influent water quality and effluent water quality

[0028] Table 1 Influent water quality of leachate (unit: mg / l; pH value is dimensionless)

[0029]

Pollutant index

COD Cr

BOD 5

NH 3 -N

SS

TN

Conductivity

(μS / cm)

pH

Concentration of pollutants

15000

3750

2300

1200

2500

25000

6～8

[0030] Table 2 Leachate treatment effluent water quality (unit: mg / l; pH value is dimensionless)

[0031] Pollutant index

COD Cr

BOD 5

NH 3 -N

S...

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Abstract

The invention discloses a method and a system for treating landfill leachate. The method mainly comprises the following steps of: pretreating the leachate, and removing large-particle solid pollutants from the landfill leachate; and performing membrane treatment, discharging treated effluent meeting the standard, simultaneously generating concentrated solution, and treating the concentrated solution through wet catalytic oxidation to meet the emission standard. The system mainly comprises a grill, a membrane treatment system and wet catalytic oxidation treatment equipment. The invention has the advantages that: the landfill leachate is subjected to the membrane treatment to directly meet the emission standard, the concentrated solution is subjected to the wet catalytic oxidation treatment, and the treated effluent can meet the direct emission standard, and can be used as cleaning water and the like; and the thorough standard treatment of the leachate and resource recycle are realized.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a treatment method and system for landfill leachate. Background technique [0002] Landfill leachate is a complex composition, COD cr 、BOD 5 , heavy metals, ammonia nitrogen and high salt content, deep color, foul odor, imbalance of microbial nutrient elements, poor biodegradability, dominant organic matter with large molecular weight, low BOD / COD, large changes in water quality and quantity, high concentration that is difficult to treat For organic wastewater, the effect of conventional biological treatment is usually not ideal, and it is difficult to meet the high requirements of sewage treatment discharge standards (such as the first-class standard). For example, the treatment of landfill leachate in Laogang waste landfill in a certain city adopts a combination of regulating ponds, anaerobic ponds, facultative oxygen ponds, aeration ponds, reed wetlands, che...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/44C02F1/72C02F1/66C02F103/06
Inventor 李国文喻勇张二龙包长春王天德
Owner BEIJING BIOTECHINA ENVIRONMENT CORP
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