Fungal pretreatment of yard trimmings for enhancement of methane yield from solid-state anaerobic digestion.
Fungal pretreatment of yard trimmings for enhancement of methane yield from solid-state anaerobic digestion.
复制标题
DOI：
10.1016/j.biortech.2014.01.011
复制
发表时间：
2014-03
影响因子：
11.4
通讯作者：
Jia Zhao;Yi Zheng;Yebo Li
中科院分区：
文献类型：
--
作者：
Jia Zhao;Yi Zheng;Yebo Li
利用白腐菌Ceriporiopsis subvermispora对庭院修剪物进行预处理，通过固态厌氧消化提高甲烷产量。水分含量（MC），在45%，60%，和75%，综纤维素和木质素的降解在真菌预处理步骤和在消化步骤中的甲烷生产的影响进行了研究，与对照组相比（高压灭菌，不接种）和原料庭院修剪。发现C.在60%MC下，亚蠕孢菌对木质素的降解率高达20.9%，而对纤维素的降解率仅为7.4%。因此，在60%MC预处理的样品在消化步骤中达到最高的甲烷产率44.6 L/kg挥发性固体（VS），这是106%和154%，分别高于对照组（21.6 L/kg VS）和原料庭院修剪（17.6 L/kg VS）。甲烷产量的增加可能是由于木质素在预处理过程中的降解。
Yard trimmings were pretreated by Ceriporiopsis subvermispora, a white-rot fungus that selectively degrades lignin, to enhance methane production via solid-state anaerobic digestion. Effects of moisture content (MC), at 45%, 60%, and 75%, on the degradation of holocellulose and lignin in the fungal pretreatment step and on methane production in the digestion step were studied with comparison to the control group (autoclaved without inoculation) and raw yard trimmings. It was found thatC. subvermisporahad a high lignin degradation of 20.9% but limited cellulose degradation of 7.4% at 60% MC. Consequently, samples pretreated at 60% MC achieved the highest methane yield of 44.6 L/kg volatile solid (VS) in the digestion step, which was 106% and 154% higher than the control group (21.6 L/kg VS) and the raw yard trimmings (17.6 L/kg VS), respectively. The increase in methane production was probably caused by the degradation of lignin during the pretreatment.