Effect of temperature on the anaerobic digestion of cardboard with waste yeast added: Dose-response kinetic assays, temperature coefficient and microbial co-metabolism
作者： Dunjie Li , Liuying Song , Hongli Fang , Yongsen Shi , Yu-You Li
DOI: 10.1016/J.JCLEPRO.2020.122949
关键词:
摘要: Abstract Effective co-metabolism of microbes has been reported as an available method to achieve better performance digestion. In order identify the optimal synergetic living conditions and obtain highest methane production, co-digestion cardboard waste yeast at 15, 25 35 °C were investigated in batch test. The results showed that it facilitated establish efficient metabolism with 0.05 g yeast/g TS sludge added, which obtained maximal biomethane production 228.91 mL/gVS (C0.5). However, addition excessive caused a serious decline due accumulation VFA. Temperature played significant roles microbes, temperature coefficient (Q10) can reflect effect on microbial activity trend increasing firstly, then decreasing added. biggest difference was after 0.2 g added Q10 2.67. RDA analysis dosage are dominant driving factors, seriously affect community structure. Syntrophic VFA-oxidizing bacteria (f_Synergistaceae) Methanosaeta enriched C0.5. Energy flowing revealed energy generated C0.5 much greater than others, its net yield increased by 60.1% compared 15 °C. indicated beneficial reduction stabilization for cleaner realizes economic benefits from 35 °C.
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