Anaerobic treatment of sewage sludge and grease trap sludge in continuous co-digestion.

摘要: In recent years many researchers show a high interest in co-digestion, simultaneous anaerobic decomposition of homogenous mixture at least two biodegradable waste. Anaerobic codigestion is reported to offer several benefits over digestion separate materials, such as increased cost-efficiency, biodegradation the treated well biogas production. Most often sewage sludge digested alone while co-digestion with other substrates could be beneficial. this study, feasibility and grease trap waste (GTW) from meatprocessing plant was investigated lab-scale reactor experiment. The research made on coming municipal wastewater treatment meat industry company. studied semi-continuous experiment 37 o C. Feeding reactors performed once day hydraulic retention time (HRT) 10 days. accounted for 2, 4, 6, 8 % volatile solids basis. mixtures were analyzed following parameters: total solids, pH, fatty acids long chain (LCFAs). control process every basis measurement What more, there determined solid removal yield order assess efficiency process. It found that improved both production methane content. Grease addition 10% feed VS by 16 concentration (72 biogas) compared period when only sludge. Moreover, GTW organic matter removal. Although, significant variations LCFAs reduction, higher GTW. results present laboratory study revealed use co-substrate considered interesting option due However, should planned carefully stepwise increase desired ratio acclimatize bacteria prevent overloading.