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. 1989 Jan;55(1):29–32. doi: 10.1128/aem.55.1.29-32.1989

Use of nutrient response techniques to assess the effectiveness of chlorination of rapid sand filter gravel.

M S Lytle 1, J C Adams 1, D G Dickman 1, W R Bressler 1
PMCID: PMC184049  PMID: 2705772

Abstract

A direct viable counting method was used to rapidly assess the effectiveness of chlorination of biofilms on rapid sand filter gravel. A total of 50% of the cells were nutrient responsive after exposure to 0.5 mg of chlorine per liter, while this value was 25% after exposure to 25 mg of chlorine per liter. A large variation was seen in the numbers of nutrient-responsive cells on different rocks. More cells attached to the sandblasted side of marbles than to the smooth side, but there was no difference in eight of nine cases in the proportion of survival to chlorination between the two different sides. The effectiveness of chlorination appeared to be influenced by the species of bacterium in the biofilm.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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