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Deep treatment method for landfill leachate

A technology for landfill leachate and advanced treatment, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the economic pressure, high investment and operating costs of owners of high-pollution concentrates problem, to achieve the effect of low investment and operation cost and improved biodegradability

Inactive Publication Date: 2012-10-03
SHANGHAI TONGJI CONSTR TECH
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Problems solved by technology

Reverse osmosis technology has the characteristics of stable treatment effect and mature equipment; however, its equipment investment and operating costs are high, and problems such as the production of highly polluted concentrated liquid have also caused great economic pressure and inconvenience to the owner.

Method used

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Embodiment

[0016] The landfill leachate ultrafiltration effluent after biochemical reaction and ultrafiltration treatment (COD value is about 800mg / L, and the average pore size of ultrafiltration membrane is 0.01μm) is sequentially subjected to iron-carbon internal electrolysis treatment, Fenton oxidation treatment, and coagulation and sedimentation treatment , biological activated carbon filtration treatment and ozone catalytic oxidation treatment, the specific steps are as follows:

[0017] (1) Internal electrolytic treatment of iron and carbon:

[0018] The iron-carbon internal electrolytic reaction cell is filled with iron-carbon internal electrolytic fillers, with a bulk density of 1.2t / m 3 , add the landfill leachate to the electrolytic reaction tank in the iron carbon, and use the microporous aeration method for micro-aeration, and the aeration intensity is 0.1m 3 / (m 2 .h), and through pH online monitoring and automatic dosing system dosing sulfuric acid or sodium hydroxide sol...

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Abstract

The invention provides a deep treatment method for landfill leachate. The method is characterized by specifically comprising the following steps of: sequentially carrying out electrolytic treatment in ferric carbon, fenton oxidation treatment, coagulation precipitation treatment, biological activated carbon filtering treatment and ozone catalytic oxidation treatment on the landfill leachate, and discharging water. According to the deep treatment method, partial pollutant can be directly removed from the ultra-filtrated discharged water when the landfill leachate is treated due to the oxidizing and reducing functions of the electrolysis in the ferric carbon and the fenton reagent respectively, the molecular structure of the pollutant which is hard to degrade can be destroyed, and the biodegradability of wastewater can be improved; and the pollutant which can be biochemically treated can be further removed by a biological carbon filtering pool, the pollutant which is hard to degrade can be finally removed due to the ozone catalytic oxidation, and the discharged water can be guaranteed to reach the standard stably. The deep treatment method has the advantages of being low in investment and operation cost, stable and good in treatment effect, free from secondary pollution and the like.

Description

technical field [0001] The invention relates to a method for advanced treatment of landfill leachate, belonging to the technical field of wastewater treatment. Background technique [0002] Landfill leachate has complex components, strong hazards, and difficult treatment. If it is not handled properly, it will cause serious pollution to the environment. The technology route for landfill leachate treatment is generally pretreatment technology-biochemical treatment technology-advanced treatment technology. The main purpose of pretreatment technology is to remove ammonia nitrogen and inorganic substances and improve the biodegradability of landfill leachate. The main purpose of biochemical treatment is to remove dissolved organic matter and ammonia nitrogen in landfill leachate, and the main purpose of advanced treatment is to further treat refractory organic pollutants, suspended solids, ammonia nitrogen and other substances in leachate. At present, most of the landfill leach...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 匡志平陆斌王彪顾颖峰
Owner SHANGHAI TONGJI CONSTR TECH
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