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Method for treating leachate

A technology for landfill leachate and a treatment method, which is applied in the field of landfill leachate treatment, can solve problems such as difficult treatment of landfill leachate, and achieve the effects of reducing land occupation, facilitating maintenance and replacement, and having a high degree of automation.

Inactive Publication Date: 2010-08-25
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0006] The purpose of the present invention is to propose a treatment method for landfill leachate in order to solve the problem that landfill leachate is difficult to handle at present

Method used

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Embodiment

[0024] The present invention will be further described below in conjunction with drawings and embodiments.

[0025] The treatment methods of landfill leachate include adjustment tanks, flocculation sedimentation tanks, anaerobic reactors, membrane bioreactors, nanofiltration membranes and reverse osmosis membranes; the anaerobic reactors are upflow anaerobic sludge bed (UASB); The bioreactor includes anoxic zone and aerobic zone;

[0026] 1) The index of raw water is CODcr: 12000mg / l; BOD 5 : 7000mg / l; SS: 2000mg / l; Ammonia nitrogen: 4000mg / l leachate enters the adjustment pool through the potential difference, and the water quality and water quantity are adjusted in the pool, so that the concentration of various pollutants is in a uniform state. Prevent fluctuations in water quality and water volume from causing major impacts on subsequent treatment stages;

[0027] 2) Lift the leachate in the adjustment tank to the coagulation reactor with a water pump, and add flocculant ...

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Abstract

The invention relates to a method for treating leachate, which is mainly used for treating town refuse landfill leachate and high-concentration industrial wastewater, and belongs to the technical field of environmental protection. A device for realizing the method comprises a regulating reservoir, a flocculation settling pond, an anaerobic reactor, a membrane bioreactor, a nanofiltration membrane and a reverse osmosis membrane, wherein the anaerobic reactor is an up-flow anaerobic sludge blanket (UASB) or an up-flow sludge blanket filter (UBF); and the membrane bioreactor comprises an anoxic zone and an aerobic zone. The method has high removing rate of CODcr, BOD5, suspended matters (SS) and ammonia nitrogen in the leachate; the device has the advantages of compact structure to reduce occupied land, convenient assembly, quick startup and reduction in debugging time; various membrane modules adopt a modular mode so as to contribute to maintenance and replacement; effluent meets the index requirements of 'Standard for Pollution Control on the Landfill Site of Municipal Solid Waste' (GB 16889-2008); and the effluent can be collected for recycling on occasions having low requirements on water quality.

Description

technical field [0001] The method for treating landfill leachate according to the invention is mainly used in the treatment of leachate from urban landfills and high-concentration industrial wastewater, and belongs to the technical field of environmental protection. Background technique [0002] Landfill leachate is a kind of high-concentration, difficult-to-treat organic wastewater, which will cause serious secondary environmental pollution to the surrounding groundwater, surface water, soil, atmosphere, organisms, etc., and will directly or indirectly enter the human body through the food chain , endangering human health. [0003] The properties of landfill leachate depend on various factors such as waste composition, landfill time, and climatic conditions. Generally, it has the following characteristics: (1) High concentration of organic matter, chemical oxygen demand (CODcr) and biochemical oxygen demand (BOD 5 ) the highest concentration can reach thousands to tens of ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 白振光原培胜李勇华赵瀛王成伟尹晓峰
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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