Waste disposal

• Several terms are used when dealing with waste
• Sewage-is the name given to human excrement (faeces and urine) when collected together.
• Sewage also includes kitchen waste and industrial waste
• Waste is also known as effluent
• Sewage waste is collected in a watery form the waste is carried either in solution or in suspension
• Refuse and garbage-refer to solid waste that accumulates as a result of domestic and industrial activity
• Examples include paper, tins, plastic bags, bottles etc
• Biodegradable waste-is waste that can be decomposed by bacteria and fungi.
• Examples are food leftovers, vegetables and cereals
• It is usually made up of organic substances
• Non biodegradable refuse-is refuse that cannot be acted on by bacteria/fungi.
• It includes plastics, polystyrene (e.g restaurant kaylite)
• This type of refuse is usually made up inorganic materials
• Recycling-this involves the use of waste and saves on raw materials in manufacturing
• It minimises waste and pollution
• It controls vectors such as rodents, flies and mosquitos thus helping to prevent spread of results

Methods of sewage disposal

• Sewage is an ever present form of waste
• Several methods have been devised to deal with it
• Methods include-
• Pit latrine
• Blair ventilated pit toilet
• Water closet(WC)

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