Yun, Yeo-Myeong Cho, Si-Kyung Kim, Hyun-Woo Jung, Kyung-Won Shin, Hang-Sik Kim, Dong-Hoon 2024-01-20T06:32:32Z 2024-01-20T06:32:32Z 2021-09-05 2015-08 0256-1115 https://pubs.kist.re.kr/handle/201004/125188 Waste activated sludge (WAS) has often been anaerobically digested with other types of organic waste, expecting a synergistic enhancement. In the present work, a slight amount of food waste (FW) such that the change of the substrate concentration and the C/N ratio could be neglected was added to WAS and biological methane potential tests were performed. As the amount of FW input increased, the total amount of CH4 produced and CH4 yield increased. The calculation proved that at least 30% of the increased amount of CH4 produced was derived from WAS, clearly signalling a synergistic enhancement. Measurements of the hydrolytic extracellular protease activity and ammonia concentration support the finding of synergism in that the addition of easily biodegradable organics to WAS facilitated the degradation of protein, a major constituent of WAS. This is the first report clearly revealing a synergistic effect of FW addition on the enhanced digestion of WAS. English KOREAN INSTITUTE CHEMICAL ENGINEERS CO-DIGESTION SEWAGE-SLUDGE PRETREATMENT FEASIBILITY HYDROLYSIS DEGRADATION KINETICS METHANE Elucidating a synergistic effect of food waste addition on the enhanced anaerobic digestion of waste activated sludge Article 10.1007/s11814-014-0271-4 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.32, no.8, pp.1542 - 1546 KOREAN JOURNAL OF CHEMICAL ENGINEERING 32 8 1542 1546 scie scopus kci ART002013846 000358744700009 2-s2.0-84938289835 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article CO-DIGESTION SEWAGE-SLUDGE PRETREATMENT FEASIBILITY HYDROLYSIS DEGRADATION KINETICS METHANE Anaerobic Digestion Biogas Food Waste Synergistic Effect Waste Activated Sludge