Question

What is the pH range of effluent after treatment?

(a) Between 4.4 and 5.5

(b) Between 4.8 and 6.1

(c) Between 6.8 and 7.8

(d) Between 7.8 and 8.3

This question was addressed to me in semester exam.

My question is taken from Control Measures of Water Pollution in section Environmental Pollution of Energy Management

Answer 1

The correct option is (c) Between 6.8 and 7.8

The best I can explain: The pH of effluent after treatment has been found to be between 6.8 and 7.8, which is an ideal range of fresh water. As the metals are extracted from the effluents, it causes considerable cleaning of the effluent.