INVERKAN AV NITRAT, SUBSTRAT OCH SYRE PÅ SYSTEM FÖR BIOLOGISK FOSFORAVSKILJNING / Influence of Nitrate, Substrate and Oxygen on Biological Phosphorus Removal Systems
In november 1990 a new pilot plant for combined biological phosphorus- and nitrogen removal was started up at Sjölunda sewage treatment plant in Malmö. As a complement to the investigations in the pilot plant, laboratory tests were carried out in cooperation with Sjölunda during the autumn and winter 1990-91. The aims of this work were:
• To increase the understanding of how the denitrification works in a system for combined biological phosphorus- and nitrogen removal.
• To investigate the influence of nitrate, oxygen and organic matter on phosphate release in such a system.
• To develop a simple laboratory method for measurements of sludge activity.
The results support the opinion that a considerable part of phosphate accumulating bacteria in the biomass can denitrify by using stored carbon. “Complete abstract not presented.”