Municipal solid waste(MSW)management has emerged as probably the most pressing issue many governments nowadays are facing.Traditionally,Waste-to-Energy(WtE)is mostly associated with incineration,but now,with the emerg...Municipal solid waste(MSW)management has emerged as probably the most pressing issue many governments nowadays are facing.Traditionally,Waste-to-Energy(WtE)is mostly associated with incineration,but now,with the emergence of the bioeconomy,it embraces a broader definition comprising any processing technique that can generate electricity/heat or produce a waste-derived fuel.Under the ambit of the circular economy many nations are looking for,additional effort must be made to be sure of acquiring the most updated information and paving a sustainable path for managing MSW in such a frame.In this regard,we have undertaken a critical review of various technologies,with their updated progress,involved in the exploitation of MSW as a renewable resource,along with the critical advantages and limitations on energy and material cycling for sustainable MSW management.Incineration,the most widely used method,is nowadays difficult to further apply due to its dubious reputation and social opposition.Meanwhile,to address the organic fraction of MSW which currently is mostly unrecycled and causes disposal issues,the biological approach presents an attractive option.The new emphasis of bioeconomy leads us to understand how environmental biotechnologies should be better connected/integrated for more sustainable MSW management.This article is concluded with advances of future prospects,which can serve as a timely reminder to encourage competent authorities/researchers to work towards further improvement of the present MSW management system.展开更多
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 bio...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.展开更多
文摘Municipal solid waste(MSW)management has emerged as probably the most pressing issue many governments nowadays are facing.Traditionally,Waste-to-Energy(WtE)is mostly associated with incineration,but now,with the emergence of the bioeconomy,it embraces a broader definition comprising any processing technique that can generate electricity/heat or produce a waste-derived fuel.Under the ambit of the circular economy many nations are looking for,additional effort must be made to be sure of acquiring the most updated information and paving a sustainable path for managing MSW in such a frame.In this regard,we have undertaken a critical review of various technologies,with their updated progress,involved in the exploitation of MSW as a renewable resource,along with the critical advantages and limitations on energy and material cycling for sustainable MSW management.Incineration,the most widely used method,is nowadays difficult to further apply due to its dubious reputation and social opposition.Meanwhile,to address the organic fraction of MSW which currently is mostly unrecycled and causes disposal issues,the biological approach presents an attractive option.The new emphasis of bioeconomy leads us to understand how environmental biotechnologies should be better connected/integrated for more sustainable MSW management.This article is concluded with advances of future prospects,which can serve as a timely reminder to encourage competent authorities/researchers to work towards further improvement of the present MSW management system.
基金funded by the National Research Foundation,Prime Minister’s Office,Singapore under its Campus for Research Excellence and Technological Enterprise(CREATE)Programme.
文摘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.
