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By O. Jaag

ISBN-10: 0080114385

ISBN-13: 9780080114385

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Extra resources for Advances in Water Pollution Research. Proceedings of the Second International Conference Held in Tokyo, August 1964

Sample text

After a number of tests, it became clear that equation (2) gives the practical concentration of toxicant in this tank. -1' C V V(l + {0-19 + 0*\(X/L)}VIV K } The concentration of toxic substances which react with solutes in tap water are not given by equation (2). In order to determine those actual concentrations, it is neces­ sary to measure by either chemical or physical means the toxic concentration on samples of water simultaneously taken from different positions of the tank. An approximate toxic-gradients scale between both ends of the tank can be calculated as CJCL = (K() +- Vw)l(Vn + 0-19K,,) < 5-27 from equation (2).

Furthermore, coliform destruction should not be used as a guide to Mycobacteria destruction, since it has been estimated that tubercle bacilli are 10 times as resistant to chlorine as are the usual enteric bacteria (HECIKEN 5 ). We must also consider, as will be 16 L. COIN, M. L. MENETRIER, J. LABONDE and M. C. HANNOUN pointed out in Dr. LIEBMANN'S paper, the other microbiological forms, particularly parasites, that are present in sewage. Use of treated sewage for irrigation purposes is an important scientific and economic problem and demands more study.

COIN, M. L. MENETRIER, J. LABONDE and M. C. HANNOUN pointed out in Dr. LIEBMANN'S paper, the other microbiological forms, particularly parasites, that are present in sewage. Use of treated sewage for irrigation purposes is an important scientific and economic problem and demands more study. Finally, we would like to support and expand Dr. COIN'S interesting philosophy that, until a means of detecting the virus of infectious hepatitis in the laboratory is developed, we should from a sanitary point of view, consider utilizing poliovirus and other enteroviruses as indicators of pollution in the same way as the coliform group has been used to indicate the possible presence of pathogenic bacteria.

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