Biological phosphorus removal in a sequencing batch moving bed biofilm reactor

Experiments have been carried out with biological phosphorus removal in a s equencing batch moving bed biofilm reactor (SBMBBR) with a plastic biofilm carrier (Kaldnes) suspended in the wastewater. The aim of the research lead ing to this paper was to evaluate biological phosphorus removal in this typ e of biofilm process. Biological phosphorus removal can be achieved in a mo ving bed biofilm reactor operated as a sequencing batch reactor. In order t o achieve good and stable phosphorus removal over time, the length of the a naerobic period should be tuned to achieve near complete removal of easily biodegradable COD in the anaerobic period. The total COD-loading rate must at the same time be kept high enough to achieve a net growth of biomass in the reactor. Use of multivariate models based on UV-absorption spectra and measurements of the redox potential show potential for control of such a pr ocess. (C) 1999 IAWQ Published by Elsevier Science Ltd. All rights reserved .