Chlor in a A part of the Symposium on Sanitation and Disinfection presented before the Division of Water, Sewage, and Sanitation Chemistry at the 122nd Meeting of the American Chemical Society, Atlantic City, N. J.
Close-up of Aeration Tanks Shows Correct Wall Contours
994
-Water
Treatment
Friant Dam in Central Valley Project on San Joaquin River near Fresno, Calif.
Although chlorination is widely used for reducing bacterial contamination of public water supplies, the mechanism of its bactericidal action is by no means completely understood. In an effort to clarify this mechanism, the authors have employed both the chemical and the biological approaches: the first involves study of the reactions of various chlorine compounds with the amino acids of proteins, and the second is concerned with the effect of certain chemicals in trying to reverse the action of chlorine on microorganisms. The chlorine compounds react with many of the amino acids in a n irreversible manner. The action of the chlorine on the bacteria cannot be reversed. It is concluded that there are many vulnerable points in the protoplasm of the microorganisms with which the chlorine compounds may react and thus cause their death, The data explain in part the reason for the greater effectiveness of hypochlorous acid over monochloramine in water sterilization practice.
Clarifier and Aerator Are Part of Sewage Treatment Plant at Colton, Calif., Constructed by MacMen, Inc., of Los Angeles
BACTERICIDAL STUDIES OF CHLORINE
R. S. Ingols, H. A. Wyckoff, T. W. Kethley, H. W. Hodgden, E.L. Fincher, J. C. Hildebrand, and J. E. Mandel . . . . . . . . . . . . . .
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996
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1001
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1004
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1009
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1013
RESIDUAL CHLORINE METHODS AND DISINFECTION OF SEWAGE
Robert V. Day, Donn H. Horchler, and Henry C. Marks . . . . . . . . . . .
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DISINFECTION OF WASTES B Y CHLORINATION
H. Heukelekian, Robert Day, and Raymond Manganelli . . . . . . ELEMENTAL IODINE AS A DISINFECTANT FOR DRINKING WATER
Shih Lu Chang and J. Carrell Morris DISINFECTION OF DRINKING WATER UNDER FIELD CONDITIONS
J. Carrell Morris, Shih Lu Chang, Gordon M. Fair, and G. H. Conant, Jr.
995
