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What is the function of a skimmer in a wastewater treatment plant?


Options:
A .   It helps in decomposing organic matter.
B .   It helps in removing suspended solids.
C .   It helps in removing large objects. 
D .   It helps in decomposing solids.
Answer: Option B
:
B

Sewage has different kinds of impurities such as suspended solids, oil, organic and inorganic impurities. 
A skimmer is a type of machine which helps in separating liquids(oil) or suspended particles from another liquid. It is usually used to separate oil and suspended solids from water in a wastewater treatment plant.



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