Organisms were isolated from activated sludge and a sprinkling filter utilized for creamy waste purification. Their ability to utilize sugar without acid production and to decompose lactic acid was studied. When inoculated into a medium consisting of 0.1% glucose, 0.075% (NH4)2, HPO4, and 0.02% KCl, adjusted to pH 6.4, growth without acid production occurred in eleven out of the thirty-nine organisms studied. With a similar medium, using lactose instead of glucose, growth with an absence of acid appeared in seventeen of thirty-nine organisms. Growth in most cases was slight, and but little of the sugar was decomposed, as determined by Fehling's solution.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Watkins, John H.
"Bacterial Decomposition of Sugars and Acids on a Trickling Filter,"
Proceedings of the Iowa Academy of Science, 32(1), 96-96.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/16