Practical preventive medicine . and condensation. condensation. (b) Undesirable metals. I. Iron Precipitation with limeand rapid sand infiltra-tion. Aeration. 2. Lead Neutralization with lime and filtration. (c) Odors and tastes (Al- gal) (see Fig. 30)Coagulation and Aeration. (d) Color rapid Coagulation and rapid sand nitration. sand filtration. (e) Turbidity Sedimentation, coagula- Coagulation and rapid tion and rapid sand sand filtration. filtration. (/) Bacterial Storage; sedimentation;rapid and slow sand fil-tration; domestic niters. (g) Bacterial destruction. Boiling; use of b
Practical preventive medicine . and condensation. condensation. (b) Undesirable metals. I. Iron Precipitation with limeand rapid sand infiltra-tion. Aeration. 2. Lead Neutralization with lime and filtration. (c) Odors and tastes (Al- gal) (see Fig. 30)Coagulation and Aeration. (d) Color rapid Coagulation and rapid sand nitration. sand filtration. (e) Turbidity Sedimentation, coagula- Coagulation and rapid tion and rapid sand sand filtration. filtration. (/) Bacterial Storage; sedimentation;rapid and slow sand fil-tration; domestic niters. (g) Bacterial destruction. Boiling; use of bleach;chlorine; and ultra-violetlight. (h) Algal destruction (see , Fig. 29) Copper sulphate. Owing to limitations of time and space we will not give fur-ther consideration to the methods for the removal of hardnessor undesirable metals, but only consider the others. 131 132 PRACTICAL PREVENTIVE MEDICINE 2. Storage.—The storage of water in large impounding reser-voirs or lakes for several months effects a removal of any in-. Fig. 29.—Applying copper sulphate for the destruction of algae at St. the bag containing the copper hung over the stern of the boat. {Huffand House, Jour. Am. W. W. Assn., 1916.)
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