Chlorine Dose For Water Treatment

Other methods of disinfection such as ultraviolet and ozonation are effective disinfectants but they do not provide a residual to prevent pathogen regrowth as chlorination does.

Chlorine dose for water treatment.

Over a seven day period a system produced 40 000 gallons of water. The most common use of chlorine dosing in water treatment is to disinfect water. In pure water cleared of other microorganisms the infective form of n. Page 26 nsw health nsw private water supply guidelines 2.

To calculate millilitres of 12 5 sodium hypochlorite liquid required to disinfect the water in a tank. 1 2 mg x 4 ppm x 8 34 lb gal 32 gal 15 x 8 34 lb gal chlorination box 2 example. Chlorine was first used in the u s. As a major disinfectant in 1908 in jersey city new jersey 3 chlorine use became more and more common in the following decades and by 1995 about 64 of all community water systems in the united states used chlorine to disinfect their water 3.

As a disinfectant it has drawbacks but it also has advantages. It is important to add sufficient chlorine to the water to meet the chlorine demand and provide. Amount of water in tank l concentration of chlorine required 1 mg l 2 mg l 5 mg l add ml add ml add ml 1000 8 16 40 2000 16 32 80 5000 40 80 200 6000 48 96 240 7500 60 120 300. These components use up chlorine and comprise the chlorine demand of the treatment system.

The choice of the chlorine type to be used often depends on cost on the available storage options and on the ph conditions required. How many gallons of chlorine will this take. Chlorine dioxide water treatment chlorine dioxide is a highly potent disinfectant biocide commonly used in drinking water for legionella control process sanitisation washing and other commercial applications. Chlorine readily combines with chemicals dissolved in water microorganisms small animals plant material tastes odors and colors.

If 500 000 gallons was treated with a 5 25 chlorine solution weighing 9 lbs gal and. Cl2 dosage mg l 9 525 x gallons of naocl solution injected x naocl w v gallons of water produced dosage example 1. The three most common chlorine containing substances used in water treatment are chlorine gas sodium hypochlorite and calcium hypochlorite. Fowleri dies after a 5 minute exposure to a chlorine concentration of 0 5 mg l roughly the recommended level for water systems.

A water storage tank with 1 2 mg is going to be chlorinated using 15 liquid chlorine at a dose of 4 ppm. Average dose chlorine dosage mg l measured as cl2.