Pretreatment of high strength wastewaters by an anaerobic fluidised red process Part I. Overall performance

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Abstract
Fixed Eilm reactors are one of the oldest methods of wastewater treatment. In the last few years several processes have been developed which have led to a resurgence of interest. An anaerobic fluidised bed‐contact reactor system has been developed for the pretreatment of high BOD wastewaters the system has been tested using a synthetic wastewater of molasses and yeast extract at approximately 3000 mg 1‐1 BOD. Treatment efficiencies in excess of 90% soluble BOD reduction and 75% total BOD reduction were possible with loading rates of up to 20kg m‐3d‐1 BOD. Sludge production was approximately 0.1 kgkg‐1 BOD removed and the system demonstrated considerable process stability.

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