CHARACTERISATION AND ANAEROBIC BATCH DEGRADATION OF MATERIALS ACCUMULATING IN ANAEROBIC DIGESTERS TREATING POULTRY SLAUGHTERHOUSE WASTE

This study characterises materials accumulating in failed and stratified aerobic digesters to find their anaerobic degradability and the factors bearing on the degradation. Experimental results show digesters with insufficient hydraulic retention time accumulate long-chain fatty acids and result in a low recovery process failure. The material in the well-performing digesters are highly stratified,suggesting there is active biomass in each layer.