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This article in JEQ

  1. Vol. 10 No. 4, p. 491-497
    Received: Nov 15, 1979

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Proportions of Several Elements Found in Sewage Effluent and Sludge from Several Municipalities in West Virginia1

  1. D. J. Horvath and
  2. R. A. Koshut2



Sewage sludge and effluent from 11 municipal waste-water treatment plants were analyzed for 14 elements. Using estimated discharge rates of the treatment plants and the analytical values for the samples, the weight of each element discharged in sludge and in effluent was calculated. These weights were then compared and significant differences among both municipalities and elements were noted. Attention is focused on evidence that sludge is enriched in Zn whereas effluent is enriched in Cd, indicating differential handling of these two elements in waste-water treatment. In contrast, ratios of Zn to Cu remain virtually constant throughout the waste-water treatment process.

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