Microaerobic conditions during the co-digestion of manure with straw;effect on process performance and microbial communities
Efficient treatment methods applied during anaerobic digestion (AD) of lignocellulosic substrates can favour the utilisation degree of biomass and subsequently,the sustainability of the whole process.The addition of limited amounts of oxygen to biogas reactors can boost lignocelluloses deconstruction and increase biomethanation.In this study,the result of microaerobic conditions on AD process performance and also,on microbiome changes during the co-digestion of cattle manure with wheat straw was evaluated.It was shown that microaerobic conditions managed to improve the methane yield by approximately 7%.Conversely,the pH and volatile fatty acids accumulation were not significantly affected and thus,oxygen injection did not provoke any inhibition to the process performance.Regarding the microbial communities,a clear shift in the bacterial populations during the limited aeration was not observed.On the contrary,a few members of the archacal community were found in higher relative abundance due to microaeration.Specifically,methanogens similar to Methanosarcina sp.and Methanobacterium sp.were further enriched and thus,performed more efficiently the methanogenesis step.
Anaerobic co-digestion wheat straw microaeration methane yield 16S rRNA gene sequences
P.Tsapekos P.G.Kougias L.Trcu I.Angelidaki
Department of Environmental Engineering, Technical University of Denmark, Kgs.Lyngby, DK-2800, Denmark
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
455-458
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）