User:Hwasnak/Water Purification

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The history of water purification includes a wide variety of methods.

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Shortly thereafter, Major William J. L. Lyster of the Army Medical Department used a solution of calcium hypochlorite in a linen bag to treat water. For many decades, Lyster's method remained the standard for U.S. ground forces in the field and in camps, implemented in the form of the familiar Lyster Bag (also spelled Lister Bag). [The bag is made of canvas and can hold 36 gallons of water. It is porous and held up by ropes, purifying water with the help of calcium hypochlorite solution. Each bag has a faucet attached, which is used to flush water for testing, as well as dispensing for use. After 10 minutes of contact with the solution, a 5ppm sample must be tested for cleanliness before drinking. Marine Water Pump, Guadalcanal, circa 1942.jpg