The Constructor

Methods of Solid Waste Disposal and Management

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Methods of Solid Waste Disposal and Management

Methods of solid waste disposal and management are as below:

Open burning of Solid Wastes

Not an ideal method in the present day context

Dumping into Sea

Sanitary Landfilling of Solid Wastes

Engineered Landfills of Solid Wastes

Figure: A Typical Sanitary Landfill for Solid Waste

Figure: A Typical Sanitary Landfill

Components of a Typical Landfill

Figure: Examples of systems in municipal solid waste landfills

Where LCS = Leachate collection system GCS = Geosynthetic clay liner LDS = Leachate detection system

MSW Landfill Gas

Table: Typical Constituents of municipal solid waste landfill gas
Component % by volume (dry)

Methane

45 to 60

Carbon dioxide

40 to 60

Nitrogen

2 to 5

Oxygen

0.1 to 1

Ammonia

0.1 to 1

Hydrogen

0 to 0.2

Incineration of Solid Waste

Waste to Energy Combustors

Combustors for Solid Waste

Figure: A typical MSW Combustor

Grates of MSW Combustor

Figure: Grates of MSW combustor. The under fire air is blown through the holes in the drawings show three types grates. (b) reciprocating (c) rocking (d)travelling

Composting

Methods
  1. Open window composting
  2. Mechanical composting
Open window composting Mechanical composting Methods used in India Indore method – aerobic – brick pits 3 x 3 x 1 m – up to 8-12 weeks materials are turned regularly in the pits and then kept on ground for about 4-6 weeks – 6 to 8 turnings in total Bangalore method – anaerobic – earthen trenches 10 x 1.5 x 1.5 m – left for decomposition – takes 4 to 5 months

Vermicomposting

Disposal by Ploughing into fields

Disposal by hog feeding

Salvaging

Fermentation or Biological Digestion

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