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Zero-emission treatment method and system for landfill leachate

A landfill leachate and treatment method technology, which is applied in the field of landfill leachate zero-discharge treatment methods and systems, can solve the problems of easy fouling and fouling of membranes, large volume of membrane concentrates that are difficult to handle, and high A/O operation requirements. Small footprint, good promotion prospects, and efficient treatment effects

Pending Publication Date: 2021-04-02
NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

At present, the mainstream treatment process of landfill leachate for incineration power plants is "pretreatment + anaerobic + two-stage A / O + ultrafiltration + nanofiltration + reverse osmosis", but the process has high requirements for A / O operation, and the membrane is easy to operate during operation. Fouling and scaling, and the amount of membrane concentrate produced at the same time is difficult to handle, which brings great challenges to the stable operation of the entire process

Method used

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  • Zero-emission treatment method and system for landfill leachate

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Embodiment 1

[0055] COD is 47700mg / L, ammonia nitrogen is 926mg / L, total nitrogen is 1442mg / L, total hardness is 2450mg / L, and SS is 20450mg / L, the zero discharge treatment method of landfill leachate is as follows:

[0056] Step 1: Filtration, the landfill leachate flows through the filter, and the fine suspended solids and insoluble impurities in the landfill leachate are removed through the microporous filtration of the filter. After treatment, COD was 45697mg / L, ammonia nitrogen was 913mg / L, total nitrogen was 1358mg / L, total hardness was 2418mg / L, and SS was 15929mg / L.

[0057] Step 2: Anaerobic, the effluent from step 1 enters the anaerobic reactor, and most of the organic pollutants in the leachate are removed through anaerobic biochemical action. The anaerobic biogas is further incinerated through biological desulfurization, and the desulfurization product is sulfur. After treatment, COD is 5219mg / L, ammonia nitrogen is 820mg / L, total nitrogen is 1225mg / L, total hardness is 2388mg...

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Abstract

The invention discloses a zero-emission treatment method and system for the landfill leachate. The advantages of anaerobism, TUF softening, DTNF, deamination membranes, AOP / BAC and DTRO processes areefficiently connected in series, targeted staged treatment is achieved according to the characteristic that the landfill leachate is high in concentration and difficult to treat, and the final effluent treated by the process is good in quality and meets the water supplementing standard of an open type circulating cooling water system: The reuse of urban recycling water-Water quality standard for industrial uses (GB / T 19923-2005).

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a zero-discharge treatment method and system for landfill leachate. Background technique [0002] The leachate of waste incineration power plants is produced from the discharge liquid in the process of waste compression and ripening. It has the characteristics of complex organic components, high concentrations of suspended solids and heavy metals, and is very difficult to treat. At present, the mainstream treatment process of landfill leachate for incineration power plants is "pretreatment + anaerobic + two-stage A / O + ultrafiltration + nanofiltration + reverse osmosis", but the process has high requirements for A / O operation, and the membrane is easy to operate during operation. Fouling and scaling, and the amount of membrane concentrate produced at the same time is difficult to handle, which poses a great challenge to the stable operation of the entire proce...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/06
CPCC02F9/00C02F1/001C02F3/28C02F5/00C02F1/441C02F1/442C02F1/444C02F1/04C02F2103/06C02F1/76
Inventor 刘军高尚李春泉孙少龙刘彦奎王英惠程池权韩珊珊刘健
Owner NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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