Enhanced hydrolysis and methane yield of temperature-phased dewatered sludge anaerobic digestion by microbial electrolysis cell

This study investigated the effect of the integration of intermittent energization MEC in different phases of TPAD on the digestion of dewatered sludge. Thermophilic and MEC hydrolysis could release higher total ammonia nitrogen of 186.0% and 10.3% than control, mesophilic methanogenesis phase integrated with MEC relieved the ammonia inhibition and accelerated the acid utilization leading to the relief of acid accumulation. The ultimate methane yield of the TPAD integrated with MEC was increased by 118.9%, in which the relative abundance of Methanothermobacteria and Methanosarcina was increased. Therefore, intermittent energization MEC integrated TPAD synchronously improved the hydrolysis and methane yield.PMID:38599354 | DOI:10.1016/j.biortech.2024.130682

Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Cheng Peng Tianfeng Wang Yutong Feng Xin Fan Jiazi Niu Jie Wang Wenqi Gao Youfei Zhou Weijie Hu Qingfang Zhang Source Type: research