Landfill leachate treatment method

A technology of landfill leachate and treatment method, which is applied in the treatment field of leachate of urban domestic waste sanitary landfill, can solve the high investment and operation cost of landfill economic burden, the total project investment and the high cost of ton water treatment, and the high cost of treatment. The operation of the facility is greatly affected by the environment, etc., to achieve the effect of low cost per ton of water treatment, simple management and good operation stability

Inactive Publication Date: 2015-11-18
湖南省交通科学研究院有限公司
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Problems solved by technology

[0016] The biggest feature of the fourth category of treatment process is that it does not use ultrafiltration membrane (UF), nanofiltration membrane (NF), reverse osmosis membrane (RO) and other membrane components, so no concentrated liquid is produced
[0021] It can be seen from the above table that although the treatment effects of the first, second and third categories of treatment processes are stable and the effluent quality is excellent, the total investment of the project and the cost per ton of water treatment ar

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[0088] The leachate enters the sedimentation tank A through the leachate raw water inlet pipe 1, and iron salt flocculant is added to the leachate in the leachate raw water inlet pipe 1 through the iron salt dosing pipe 2 through the pipeline mixer, and at the same time, it is added by alkali as needed. Pipeline 3 adds an appropriate amount of NaOH to leachate raw water inlet pipe 1 to adjust the pH of the leachate to 7-9. The sedimentation time of the leachate in the sedimentation tank A is 1 to 3 hours. The sludge in the sedimentation tank A is discharged into the mud storage tank O through the sedimentation tank sludge discharge pipe 5, and the effluent of the sedimentation tank A enters the pH adjustment tank B through the sedimentation tank outlet pipe 4, and NaOH is added to adjust the osmosis in the tank through the alkali dosing pipe 7. The pH of the filtrate is 10.5-11.5. While adjusting the pH, according to the measured temperature of the leachate, an appropriate amo...

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Abstract

The invention relates to a landfill leachate treatment method. The landfill leachate treatment method comprises following steps in sequence: pretreatment comprising steps of flocculating sedimentation, ammonia stripping, ammonia adsorption and processes of regulating pH and adjusting the temperature of the leachate to be not lower than 15 DEG C, primary anoxic-aerobic biological treatment, primary sedimentation treatment, chemical oxidation treatment, secondary sedimentation treatment, secondary anoxic-aerobic biological treatment, tertiary sedimentation treatment and disinfection treatment. According to the landfill leachate treatment method, a physicochemical and biochemical combined treatment system is adopted based on the characteristics of the municipal solid waste landfill site leachate, so that stable and efficient operation of the whole system is guaranteed, and the landfill leachate reaches the emission standard of Standard for Pollution Control on the Landfill Site Of Municipal Solid Waste (GB16889-2008) finally.

Description

technical field [0001] The invention relates to a treatment method for leachate of sanitary landfills of urban domestic garbage, and belongs to the technical field of environmental engineering sewage treatment. Background technique [0002] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. A high concentration wastewater. High concentration of ammonia nitrogen is one of the water quality characteristics of leachate, and the concentration of ammonia nitrogen in leachate generally ranges from tens to thousands of milligrams per liter. According to the law of water quality change of leachate produced in domestic solid waste landfills, with the prolongation of landfill time, the concentration of ammonia nitrogen in leachate tends ...

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Application Information

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IPC IPC(8): C02F9/14
Inventor 叶颖杨帆李定策王宝林
Owner 湖南省交通科学研究院有限公司
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