Give 2 reasons why chlorine is often added to groundwater prior to any other unit processes/treatment? Solution The Benefits of Chlorine Potent Germicide Chlorine disinfectants can reduce the level of many disease-causing microorganisms in drinking water to almost immeasurable levels. Taste and Odor Control Chlorine disinfectants reduce many disagreeable tastes and odors. Chlorine oxidizes many naturally occurring substances such as foul-smelling algae secretions, sulfides and odors from decaying vegetation. Biological Growth Control Chlorine disinfectants eliminate slime bacteria, molds and algae that commonly grow in water supply reservoirs, on the walls of water mains and in storage tanks. Chemical Control Chlorine disinfectants destroy hydrogen sulfide (which has a rotten egg odor) and remove ammonia and other nitrogenous compounds that have unpleasant tastes and hinder disinfection. They also help to remove iron and manganese from raw water. .

1. Give 2 reasons why chlorine is often added to groundwater prior to any other unit
processes/treatment?
Solution
The Benefits of Chlorine
Potent Germicide
Chlorine disinfectants can reduce the level of many disease-causing microorganisms in drinking
water to almost immeasurable levels.
Taste and Odor Control
Chlorine disinfectants reduce many disagreeable tastes and odors. Chlorine oxidizes many
naturally occurring substances such as foul-smelling algae secretions, sulfides and odors from
decaying vegetation.
Biological Growth Control
Chlorine disinfectants eliminate slime bacteria, molds and algae that commonly grow in water
supply reservoirs, on the walls of water mains and in storage tanks.
Chemical Control
Chlorine disinfectants destroy hydrogen sulfide (which has a rotten egg odor) and remove
ammonia and other nitrogenous compounds that have unpleasant tastes and hinder disinfection.
They also help to remove iron and manganese from raw water.