Which of the following is a primary treatment for water pollution?(a) Sludge method(b) Trickling filter method(c) Sedimentation(d) Removal of nitratesThis question was addressed to me by my school teacher while I was bunking the class.The above asked question is from Environmental Issues in chapter Environmental Issues of Biology – Class 12

Which of the following is a primary treatment for water pollution?(a)

1.	Which of the following is a primary treatment for water pollution?(a) Sludge method(b) Trickling filter method(c) Sedimentation(d) Removal of nitratesThis question was addressed to me by my school teacher while I was bunking the class.The above asked question is from Environmental Issues in chapter Environmental Issues of Biology – Class 12
Answer» RIGHT OPTION is (c) Sedimentation Easiest EXPLANATION: The primary treatment involves the separation of solid matter from the WASTEWATER. In this, the wastewater is poured into big tanks and the solid matter is allowed to settle at the surface of the tanks. This is done by sedimentation, FILTRATION, flotation, etc.

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