沼渣
厌氧消化
稻草
沼气
糠醛
制浆造纸工业
木糖
化学
纤维素
生物燃料
生物量(生态学)
木质纤维素生物量
生物能源
半纤维素
泥浆
甲烷
玉米秸秆
食品科学
废物管理
农学
发酵
生物技术
环境科学
生物化学
生物
有机化学
环境工程
无机化学
催化作用
工程类
作者
Shuaishuai Ma,Hongliang Wang,Binshou Wang,Xin Gu,Wanbin Zhu
标识
DOI:10.1016/j.biortech.2021.126177
摘要
The development of biogas projects feed by lignocellulosic biomass has been constrained by the high cost of pre- and post-treatment. In this study, a novel strategy for pretreatment by using two by-products, i.e., CO2 and liquid digestate (LD), generated from anaerobic digestion (AD) was developed to overcome these shortcomings. Results showed that corn straw pretreated in LD pressurized under 1 Mpa CO2 at 55 ℃ resulted in increased glucose and xylose contents and a 9.80% decrease in cellulose crystallinity. After 45 days of AD conversion, the methane yield increased by 50.97% compared with untreated straw. However, pretreatment in LD pressurized under 1 Mpa CO2 at 170 ℃ produced 5-hydroxymethylfurfural and furfural, which led to a decrease in methane production from the straw in the subsequent AD conversion. The alteration of the microbial community in the pretreated slurry at 55 °C was another potential contributor to the enhanced performance of AD.
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