Stand und Entwicklungstendenzen der biologischen Phosphatelimination aus Abwasser mit Belebtschlamm |
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| Authors: | V Peukert I Rske D Uhlmann |
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| Institution: | V. Peukert,I. Röske,D. Uhlmann |
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| Abstract: | The recovery of phosphorus will become almost as important as its removal for preventing eutrophication. In this connection, the biological techniques for the elimination of P are of a special importance. The fundamentals and the process technologies of the “phostrip” technique and the anaerobic/aerobic technique are described. The biological P-removal is more susceptible to interference than the normal activated sludge process is. The most important sources of troubles are discussed. For a stable process it is necessary at the anaerobic stage that neither molecular oxygen nor nitrate oxygen are present and that the organic substances contained in the waste water are partly hydrolyzed in order to use up the intracellular energy reserves in the form of polyphosphates to a considerable degree. Moreover, at the aerobic stage there have to be guaranteed high rates of growth of the P-storing bacteria and the formation of polyphosphates as well as only a low degree of nitrification. From this results an increased expenditure for the process control especially for the oxygen and nitrate concentrations at the aerobic stage. The results from two model plants are represented. |
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