A) mechanical process
B) chemical process
C) biological process
D) physical process
Correct Answer: C
Solution :
In secondary or biological treatment of municipal waste rich in sewage, the organic matter is decomposed with the help of microbes. Decomposition of organic matter occurs by one of the three methods-water hyacinth pod, trickling filter method and activated sludge method. After decomposition the treated water is sterilized through chlorination.
You need to login to perform this action.
You will be redirected in
3 sec
