Effects of steam explosion on lignocellulosic degradation of, and methane production from, corn stover by a co-cultured anaerobic fungus and methanogen
Effects of steam explosion on lignocellulosic degradation of, and methane production from, corn stover by a co-cultured anaerobic fungus and methanogen
复制标题
蒸汽爆炸对共培养厌氧真菌和产甲烷菌对玉米秸秆木质纤维素降解和产甲烷的影响
DOI：
10.1016/j.biortech.2019.121796
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发表时间：
2019-10-01
影响因子：
11.4
通讯作者：
Zhu, Weiyun
中科院分区：
文献类型：
--
作者：
Shi, Qicheng;Li, Yuqi;Zhu, Weiyun
研究了蒸汽爆破对玉米秸秆木质纤维素消化率及厌氧真菌与产甲烷菌共培养产甲烷的影响。在温育72小时时，蒸汽爆破的玉米秸秆的累积甲烷产量为32.2 +/-1.74 mL，与未处理的玉米秸秆的累积甲烷产量（37.1 +/-1.09 mL）没有显著差异（P > 0.05）。然而，蒸汽爆破使玉米秸秆的半纤维素含量降低了28.0 +/- 0.39%，使中性洗涤剂溶质增加了23.5 +/-0.25%。而该处理不影响干物质消化率（分别为64.1 +/-0.26%和64.1 +/-0.28%）。总之，厌氧真菌和产甲烷菌的共培养可以在不进行任何预处理的情况下降解玉米秸秆的粗纤维部分。利用农作物秸秆资源转化为沼气燃料具有广阔的生物技术前景。
The aim of this study was to investigate the effects of steam explosion on lignocellulose digestibility of, and methane production from corn stover by a co-culture of anaerobic fungus and methanogen. The cumulative methane production at 72 h of incubation from the steam-exploded corn stover was 32.2 +/- 1.74 mL, which not significantly different (P > 0.05) from that of the untreated corn stover (37.1 +/- 1.09 mL). However, steam explosion decreased the hemicellulose contents of corn stover by 28.0 +/- 0.39% and increased the neutral detergent solute by 23.5 +/- 0.25%. While this treatment did not affect the dry matter digestibility (64.1 +/- 0.26%, and 64.1 +/- 0.28%, respectively). In conclusion, the co-culture of anaerobic fungus and methanogen can degrade the crude fibrous portion of corn stover without any pretreatments. It possesses promising biotechnological prospects for conversion of crop residue based straw resources to obtain biofuel in the form of methane.