what is the procedure of making a sanitary landfill?
Answers
The following steps should be taken that are necessary be taken for the detailed design of the proposed landfill site & development of the treatment process concerning site preparation:
Topographic survey of the site
Detail leveling of the site
Contour plan
Cutting off 150 mm topsoil of the whole area and saving it for earth cover over the solid waste.
Preparing site for proper drainage of rainwater by cutting of high-level ground and giving it a downslope 1:400. Soil obtained from this cutting is used in providing the embankment of fencing of the area
Construction of road of greater width, to facilitate the trucks approaching the developmental site
Providing infrastructure with all accessories at the site to facilitate the workers.
Following parameters are adequately considered in the design of sanitary landfill site:
All the calculations are based upon the population of the city
It is considered that 30% of waste generated is landfilled, 60% is composted, while the remaining 10% is recycled.
Waste will be compacted in four layers one below the ground level and three above ground level. the depth of each layer will be 2 m.
Excavated soil will be used as cover material.
Cover for intermediate layers will be 0.15 m while the final layer will be covered by 0.6 m (2 ft) of cover material.
Excavation for one year will be made in advance.
A bond will be provided in each layer after one year.
Waste will be compacted to a density of 1000-1300 kg/m3.
Embankments will be provided at the periphery high enough to enclose the site with the fencing mounted on top.
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Answer:
sanitary landfill, method of controlled disposal of municipal solid waste (refuse) on land. The method was introduced in England in 1912 (where it is called controlled tipping). Waste is deposited in thin layers (up to 1 metre, or 3 feet) and promptly compacted by heavy machinery (e.g., bulldozers); several layers are placed and compacted on top of each other to form a refuse cell (up to 3 metres, or 10 feet, thick). At the end of each day the compacted refuse cell is covered with a layer of compacted soil to prevent odours and windblown debris. All modern landfill sites are carefully selected and prepared (e.g., sealed with impermeable synthetic bottom liners) to prevent pollution of groundwater or other environmental problems. When the landfill is completed, it is capped with a layer of clay or a synthetic liner in order to prevent water from entering. A final topsoil cover is placed, compacted, and graded, and various forms of vegetation may be planted in order to reclaim otherwise useless land—e.g., to fill declivities to levels convenient for building parks, golf courses, or other suitable public projects. See also solid-waste management.