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There is determined the LC50 for 24 … 96 h of phenol, 2,4‐dinitrophenol and pentachlorophenol as sodium salt by static assay at water temperatures of 16, 23 and 36°C. In addition, the combinations of the three substances were tested in the same way. With decreasing temperature, the toxicity of...
By means of the quality criteria COD‐Mn, NO3−, substances which can be filtered off and components of phosphate at two measuring stations at the river Elbe in the section of Dresden as well as an inflow gauge at a drinking water reservoir in the Eastern Ore Mountains there were investigated...
The authors describe a possibility of a fast determination of the metabolic activity of various activated sludge samples. There is not used the sludge property of digestion, but the biosynthesis of aminopeptidases. Egg albumin has been found to be the optimum standard indicator. The activity of...
Continuing the first part on this subject, the results of precipitation experiments are described by the example of the removal of humic acid and lignosulphonic acid. Moreover, to increase the number of process variants and in accordance with process methods after Haberer, there is proposed a...
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