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Covering geomembrane is a very important part of landfills, its main purpose is to control diseases, flying garbage, odor, improve road traffic, and improve the landscape. disease control. Reduce mosquito habitat and prevent solid waste from becoming a site for various harmful organisms. Prevent fires in landfill piles, or reduce the likelihood of fire spreading. Anti-scattering control helps control lightweight waste. Odor control can become an odor barrier and control the odor of solid waste. beautify environment.

The landfill operation area should be covered on time according to the different stages of the landfill, and daily coverage, intermediate coverage, and final coverage should be achieved.

The Thickness Of Daily Coverage Or Periodic Coverage Should Meet The Standard

The daily coverage of the landfill can be covered with materials such as soil, HDPE geomembrane, plastic-impregnated cloth, or rain cloth. Soil cover should be used, and the cover thickness should be 20-25cm; the daily cover on the slope should be covered with film or cloth. When other bulk materials are used as covering substitutes, the covering thickness should be determined with reference to the covering thickness and performance requirements of the soil.

The intermediate covering should be covered with HDPE geomembrane or LLDPE geomembrane with a thickness of not less than 0.5mm, and clay can also be used, and meet the following requirements: When using HDPE geomembrane and other materials for intermediate covering, an effective gas guide should be used. Check the effective overlap between the covering and the rainwater side ditch, and leave the slope of the rainwater flowing to the side ditch along the slope direction.

The selection of geomembrane covering materials should meet the following requirements:

The cover film should be a black HDPE geomembrane with a thickness of 0.5mm or more and a width of more than 6m or a bentonite waterproof blanket (GCL) with a thickness of more than 5mm. HDPE geomembrane can also be used for daily cover.

The cutting length of the geomembrane film should be about 20m during daily mulching, and the length of the geomembrane should be cut according to actual needs during intermediate mulching, and should not exceed 50m.

After the unit-level garbage is landfilled, the rain and sewage diversion facilities should be kept intact.

To control the odor in the operation area of the landfill, measures should be taken to reduce, control, and timely cover the exposed surface of garbage, close the leachate change tank, improve the collection rate of landfill gas, remove the accumulated water in the plant area in time, and kill the operation surface in time.