Valorization of poly-β-hydroxybutyrate(PHB)-based bioplastic waste in anaerobic digesters of food waste for bioenergy generation:reactor performance,microbial community analysis,and bioplastic biodegradation  

作　　者：Le Zhang To-Hung Tsui Jiahua Fu Yanjun Dai Yen Wah Tong 

机构地区：[1]NUS Environmental Research Institute,National University of Singapore,1 Create Way,Create Tower#15-02,Singapore 138602,Singapore [2]Energy and Environmental Sustainability for Megacities(E2S2)Phase II,Campus for Research Excellence and Technological Enterprise(CREATE),1 CREATE Way,Singapore 138602,Singapore [3]Department of Chemical and Biomolecular Engineering,National University of Singapore,4 Engineering Drive 4,Singapore 117585,Singapore [4]School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,China

出　　处：《Carbon Neutrality》2022年第1期523-536,共14页碳中和（英文）

基　　金：funded by the National Research Foundation,Prime Minister’s Office,Singapore under its Campus for Research Excellence and Technological Enterprise(CREATE)Programme.

摘　　要：This study aims to investigate the significance and biodegradation pathways of PHB-based bioplastic in anaerobic digesters treating food waste,where the reactor performance of changed methane generation,bioplastic biodegradation efficiency,and bioinformatic analysis of functional microbes were emphasized.The results showed that PHB-based plastic film could be partially biodegraded in the food waste digester,and a bioaugmentation use of Alcaligenes Faecalis(AF)and Bacillus Megaterium(BM)was beneficial to largely accelerate the degradation process through a beneficial shift of both the functional bacterial and archaeal species.Microbial community analysis indicated that the major bacterial species belonged to genera Candidatus_Cloacimonas,Rikenellaceae,and Defluviitoga,while the dominant methanogenic archaeal species belonged to genera Methanomassiliicoccus,Methanosarcina,and Methanosaeta.Bioplastic biodegradation analysis suggested that the optimal fractions of AF and BM for PHB-based plastic degradation were 50% AF and 75% BM,respectively,which deserves further optimization and scale-up validation.The finding of this study would contribute to the combined management of PHB-based bioplastic with food waste for clean energy recovery and a greener environment.

关 键 词：Anaerobic digestion Biodegradable plastic Waste management Energy recovery Bioinformatic analysis Poly-β-hydroxybutyrate(PHB) 

分 类 号：X799.3[环境科学与工程—环境工程]