Ecological strengthening treatment method for landfill leachate in northwest loess areas

A technology for landfill leachate and enhanced treatment, which is applied in filtration treatment, contaminated groundwater/leachate treatment, chemical instruments and methods, etc. Enhanced evaporation and bioabsorption treatment, control of rainwater leaching, and reduced treatment costs

Pending Publication Date: 2020-09-18
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Landfill leachate treatment facilities operate at only about 30% of their load in spring, summer and autumn, and hardly operate in winter. The equipment cannot be effectively utilized, resulting in a great waste of project construction investment costs

Method used

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  • Ecological strengthening treatment method for landfill leachate in northwest loess areas
  • Ecological strengthening treatment method for landfill leachate in northwest loess areas
  • Ecological strengthening treatment method for landfill leachate in northwest loess areas

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Embodiment Construction

[0025] Combine below figure 1 , figure 2 The implementation cases of the present invention are described in detail. This implementation case is implemented under the premise of the technical solution of the present invention, and detailed implementation modes and operation processes are provided, but the protection scope of the present invention is not limited to the following examples.

[0026] The implementation site of this example is a domestic waste landfill in Lanzhou City, with a total area of ​​about 41hm 2 , total storage capacity 390×10 4 m 3 , the average daily domestic waste is 520t, and the average daily production of landfill leachate is 100m 3 / d, the construction scale of the landfill is Class II. The annual precipitation of this site is 200-450mm, and the precipitation is mostly concentrated in July, August, and September. The precipitation accounts for more than 80% of the annual precipitation, the annual evaporation is 1100-1600mm, and the annual sunsh...

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Abstract

The invention relates to an ecological strengthening treatment method for landfill leachate in northwest loess areas, and belongs to the technical field of environmental engineering solid waste treatment. The method comprises the steps: storing leachate generated by a refuse landfill in a loess area in an adjusting tank I in winter, and starting to treat the leachate in the next spring; treating by adopting a surface recharge process in spring, summer and autumn, wherein process units comprise an aeration stripping tank, the adjusting tank I, an up-flow anaerobic sludge bed, a filtering chamber, an adjusting tank II and a recharge system. After the landfill leachate subjected to biological treatment is recharged into a loess covering layer, the landfill leachate is effectively controlled under the action of atmospheric evaporation and ecological grid growth and absorption of surface layer planting. The method is simple in process, good in treatment effect and low in treatment cost, andcan be better matched with the economic development level and natural geographical characteristics of the northwest loess areas in China.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering solid waste treatment, and relates to a method for ecologically intensified treatment of landfill leachate in the loess area of ​​Northwest China. Background technique [0002] In my country, the main domestic waste disposal methods are sanitary landfill, waste incineration, and composting. Among them, sanitary landfill is the most widely used because of its simple process, large processing capacity and convenient management. The leachate produced by the sanitary landfill of garbage contains a large number of pollutants with complex components, and the water quality and quantity vary greatly, making it difficult to treat. At present, my country's landfill leachate treatment technology is mainly biochemical treatment combined with certain advanced treatment technologies such as nanofiltration, reverse osmosis, adsorption filtration, and advanced chemical oxidation, combined with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14A01G22/00A01G25/02C02F101/16C02F101/38C02F103/06
CPCC02F9/00A01G22/00A01G25/02C02F2103/06C02F2101/16C02F1/20C02F2209/08C02F2101/38C02F2301/08C02F1/001C02F3/32
Inventor 贾普琦张雪杜晓辉黄沙沙李忠国
Owner LANZHOU UNIVERSITY
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