Question

Why controlled use of water hyacinth is important in controlling of water pollution?

(a) To decrease the BOD level

(b) To increase the BOD level

(c) To completely vanish the BOD level

(d) To maintain the BOD level

This question was addressed to me during an online interview.

My question comes from Control Measures of Water Pollution topic in section Environmental Pollution of Energy Management

Answer 1

Correct option is (b) To increase the BOD level

The best I can explain: The controlled use of water hyacinth I conjunction with waste stabilization increases the BOD removal capacity of these systems. It also reduces the high total suspended solids normally associated with sewage lagoons.