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Enhancement of bioenergy recovery from agricultural wastes through recycling of cellulosic alcoholic fermentation vinasse for anaerobic co-digestion
Bioresource Technology ( IF 9.7 ) Pub Date : 2020-05-08 , DOI: 10.1016/j.biortech.2020.123511
Liang Meng 1 , Keda Jin 2 , Ran Yi 3 , Mengdi Chen 2 , Jingjing Peng 2 , Yulong Pan 4
Affiliation  

Cellulosic alcoholic fermentation generates large amounts of vinasse, which was utilized in the present work to enhance the anaerobic digestion of rice straw and swine manure at different total solid (TS) contents. Straw fermentation resulted in bioethanol and vinasse yields of 95.2 g and 857.7 mL, respectively, per kg dry straw. Vinasse-straw co-digestion showed the highest cumulative biogas yield of 633.4 L kg−1 VS at 3% TS. Therefore, biogas productivity from co-digestion represented 92.1% higher than that of straw mono-digestion. Vinasse-manure co-digestion showed the highest cumulative biogas yield of 676.7 L kg−1 VS at 3% TS at a shorter technical digestion time, which resulted in 53.9% higher biomethane productivity than the corresponding vinasse-straw. Consequently, vinasse co-digestion at all studied TS ratios enhanced the total gross energy output rate (GEORtotal) over mono-digestion. Amongst, vinasse-manure co-digestion at 3% TS showed 7.9% higher GEORtotal than the highest recorded value from vinasse-straw co-digestion.

中文翻译:


通过回收纤维素酒精发酵酒糟进行厌氧共消化,提高农业废弃物中的生物能源回收



纤维素酒精发酵产生大量的酒糟,在本工作中,它被用于增强不同总固体 (TS) 含量的水稻秸秆和猪粪的厌氧消化。秸秆发酵导致生物乙醇和酒糟产量分别为每公斤干秸秆 95.2 克和 857.7 毫升。酒糟-秸秆共消化显示,累积沼气产量最高,为 633.4 L kg-1 vs,TS 为 3%。因此,共消化的沼气生产率比秸秆单消化高 92.1%。酒糟-粪污共消化显示,在较短的技术消化时间内,累积沼气产量最高,为 676.7 L kg-1 vs,TS 为 3%,这导致生物甲烷生产率比相应的酒糟-秸秆高 53.9%。因此,与单一消化相比,所有研究的 TS 比率的酒糟共消化提高了总总能量产出率 (GEORtotal)。其中,3% TS 的酒糟-粪肥共消化显示 GEORtotal 比酒糟-秸秆共消化的最高记录值高 7.9%。
更新日期:2020-05-08
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