Question

What happens during the aeration step of water treatment?

• A. Amount of oxygen decreases
• B. Amount of oxygen increases
• C. Amount of chlorine decreases
• D. Amount of chlorine increases

Answer 1

The correct option is B Amount of oxygen increases

Aeration is a part of secondary treatment, in which, air is pumped so that aerobic bacteria can grow and consume remaining human waste, food. The amount of oxygen in water is increased during this process. Chlorine is added after aeration to sterilize the filtered and aerated water. This process is known as chlorination.