Solid Waste Management: Methods Of Solid Waste Management

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Chapter 2 Methods of solid waste management
2.1 Methods
Methods of solid waste management are as follows:
• Open burning
• Dumping into the sea
• Sanitary Landfills
• Incineration
• Composting
• Ploughing in fields
• Hog feeding
• Grinding and discharging into sewers
• Salvaging
• Fermentation and biological digestion

Open burning
• Open burning refers to burning garbage in barrels, open pits, outdoor furnaces, woodstoves, or fireplaces. Open burning of garbage is much more harmful to health and the environment.

• Open burning of garbage poses health risks to those exposed directly to the smoke. It especially affects people with sensitive respiratory systems, as well as children and the elderly.

• Not an ideal method in the present day context

Dumping into Sea
• Possible only in coastal cities
• Refuse shall be taken in barges sufficiently far away from the coast (15-30 km) and dumped there
• Very costly
• Not environment friendly Sanitary Landfilling of Solid Wastes
• Simple, cheap, and effective
• A deep trench (3 to 5 m) is excavated
• Refuse is laid in layers
• Layers are compacted with some mechanical equipment and covered with earth, leveled, and compacted
• With time, the fill would settle
• Microorganisms act on the organic matter and degrade them
• Decomposition is similar to that in composting
• Facultative bacteria hydrolyze complex organic matter into simpler water soluble organics
• These diffuse through the soil where fungi and other bacteria

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