Question
Explain the various types of sewage.
✓
Answer
There are various types of sewage, depending upon its colour and odour. Some sewage is black and has a very bad odour.
- Sullage water: Waste water released from the kitchen is called sullage water. The contaminants in sullage water are mild detergents, oils and food particles. Moreover, it contains lots of water released when utensils are washed.
- Foul waste: Waste water released from toilets is termed as foul waste. It consists of human waste and a lot of bacteria that release gases and bad odour. It is highly infectious.
- Trade waste: Waste released from industries and commercial organisations is called trade waste. It consists of acids and strong chemicals that are toxic in nature.
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