Sind Klärwerke mit niedriger Schlammbelastung und hohem Schlammalter biologisch stabil

Sewage treatment plants are to meet high requirements concerning the elimination of pollutants and nutrients. In particular, the biological stages are driven to maximum performance. The result may be an unacceptable decrease in operational reliability. Low load and high age of sludge conditions have repeatdly lead to colonization by sludge comsuming organisms. Evidence reported here is from experience with two large municipal plants as well as from experiments on the semi-technical plant and laboratory reactor scale