SANITARY LAND FILLING OR CONTROLLED TIPPING

This is a  satisfactory method in which the refuse is placed in a designated area and covered with a layer of earth. When a level ground is used, sanitary filling is done in  trenches  2-3m  deep and  3-m  deep and  2-10m wide.  When  naturally occurring  depressions, excavations and pits are to be filled up, this can be done by tipping te refuse into them in th e form of alternate layers of  refuse and earth. A  30cm  layers  of earth is adeqauate between  two layers of refuse. 

 Sanitary filling  of low  lying places is a useful method of  reclaiming such land   for building, playgrounds, gardens  and agricultural farms. The process of sanitary filling is  much facilitated by the use of bulldozers. Physical,  chemical and bacteriological changes occurring within  the  buried mass of refuse render it innocuous with  4-6  , months  after the decomposition of organic matter is complete. MC. Gupta (20050. landfill is  a probably the most common  method of domestic waste disposal.

·        Basically it consists of four steps, viz:

·       
-depositing waste in a planned  controlled manner.

·        Spreading  and compacting it in layers to reduce its volume