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Full-amount harmless treatment method and system for landfill leachate

A technology for landfill leachate and harmless treatment, which is applied to the treatment of polluted groundwater/leachate, chemical instruments and methods, and water treatment of special compounds. Requirements, strong impact load resistance and low process operation cost

Pending Publication Date: 2021-04-30
武汉天源环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the problem of weak resistance to water quality and water volume fluctuations

Method used

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  • Full-amount harmless treatment method and system for landfill leachate
  • Full-amount harmless treatment method and system for landfill leachate
  • Full-amount harmless treatment method and system for landfill leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: Combining Figure 1 to Figure 4 As shown, a process system and treatment method for full-volume harmless treatment of landfill leachate, the system is mainly composed of pretreatment modules (including regulating tank 1, aeration coagulation sedimentation device 2) connected sequentially through pipelines, CWAO catalytic wet Oxidation module 3, MBR membrane bioreactor module (including primary nitrification-denitrification pool 4, secondary nitrification-denitrification pool 5, external tubular ultrafiltration membrane module 6), MFR membrane Fenton reactor module 7, The degassing membrane deamination module 8, the clear water tank 9, the sludge concentration tank 10, and the sludge treatment module 11 are composed. Among them, the sludge produced by the aerated coagulation sedimentation device 2 , the MBR membrane bioreactor module, and the MFR membrane Fenton reactor module 7 is connected to the sludge thickening tank 10 .

[0060] The leachate in the land...

Embodiment 2

[0070] Wastewater source: Leachate from a regulating pond of a large domestic waste dump in Wuhan City, Hubei Province. The concentration values ​​of the main pollutants in the water quality are shown in the table below:

[0071] Table 1: Analysis of the water quality of the leachate in the regulating tank of a large domestic waste dump in Wuhan City, Hubei Province

[0072]

[0073] It can be seen from Table 1 that the main pollutants, electrical conductivity, suspended solids concentration and other indicators of the leachate of the landfill adjustment pond exceeded the normal value, the C / N ratio of the leachate was out of balance, and the biodegradability was poor. Biochemical treatment + membrane advanced treatment process, the water quality and quantity are difficult to meet the standards.

[0074] The leachate full amount harmless treatment process module provided in Example 1 of the present invention is used to treat the above-mentioned landfill leachate, and the tr...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly provides a full-amount harmless treatment method and system for landfill leachate. Standard water quality is achieved by sequentially carrying out pre-aeration and pre-coagulation sedimentation treatment, catalytic wet oxidation treatment, membrane bioreactor treatment, membrane Fenton reactor treatment and degassing membrane deamination treatment on a leachate stock solution of a refuse landfill regulating reservoir. According to the method and the system, on the basic premise of ensuring that finally-produced water is qualified and reaches the standard, a water production rate is close to 95%, secondary pollutants such as membrane concentrated liquor are not generated, and zero emission and environmental protection of leachate treatment are realized; a plurality of independent treatment modules can respond immediately according to the quality and quantity change of to-be-treated wastewater, and pollutant removal efficiency can be controlled by measures such as increasing or decreasing core equipment elements and adjusting dosage; the whole method is strong in control and regulation capability and strong in impact load resistance, and can meet the treatment requirements of water quality and water quantity fluctuation of the landfill leachate in different periods; process operation cost is low.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method and system for harmless treatment of a full amount of landfill leachate. Background technique [0002] Landfill leachate refers to the secondary pollutants produced by compaction and fermentation during the process of stacking, landfilling and incineration of garbage. It is a liquid form of organic or inorganic harmful components, usually with complex components, ammonia nitrogen (NH4-N) High concentration of organic pollutants (CODcr), poor biodegradability, high total dissolved solids (TDS), high content of heavy metals, and accompanied by major characteristics such as high toxicity and stench, are recognized as one of the most difficult wastewater to treat at home and abroad one. [0003] The material composition and concentration of landfill leachate fluctuate greatly, depending on the type and nature of landfill waste, the landfill method, the ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/06
CPCC02F9/00C02F7/00C02F1/5236C02F1/725C02F3/302C02F1/20C02F1/66C02F1/56C02F1/74C02F1/444C02F2201/007C02F2305/026C02F2203/006C02F2103/06
Inventor 邹巍黄昭玮李红高本修顾磊
Owner 武汉天源环保股份有限公司
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