玉米秸秆水解残渣厌氧消化的产气性能  

Biogas production of unhydrolyzed solid from corn stover hydrolysate by anaerobic digestion

作　　者：陈世平[1] 汤晓玉[2] 肖泽仪[1] 王文国[2] 尹小波[2] VENKATESH Balan 吴波[2] 胡启春[2] 

机构地区：[1]四川大学化学工程学院,成都610065 [2]农业部沼气科学研究所,成都610041 [3]密歇根州立大学材料科学与化学工程系,美国兰辛48910

出　　处：《农业环境科学学报》2016年第3期584-589,共6页Journal of Agro-Environment Science

基　　金：四川省科技计划项目(NO.2014HH0018);中国农业科学院科技创新工程(CAAS-ASTIP-2015-BIOMA)

摘　　要：为了考察玉米秸秆水解残渣(Unhydrolyzed solid,UHS)的厌氧消化产甲烷潜力,研究了接种物类型、接种比例以及发酵温度对UHS产气性能的影响。结果表明,餐厨垃圾厌氧消化液作为接种物时,UHS具有较高的产气能力,累积甲烷产量达到208.06 m L·g^(-1)VS;UHS的累积甲烷产量与接种物对底物的比值(Inoculum to substrate ratios,RI/S)有关,其值随着接种比例的减小而逐渐降低,当接种比例RI/S为0.1∶1~3∶1时,累积甲烷产量为111.20~224.48 m L·g^(-1)VS,UHS的生物降解率为27.89%~56.29%,其降解能力随着底物浓度的升高而降低;在高温发酵(55℃)和中温发酵(35℃)条件下,相同接种比例的对照组中,UHS累积甲烷产量较为接近,但高温发酵的产气速率明显高于中温发酵。Biochemical conversion in lignocellulosic biorefineries generates large amount of solid residues（Unhydrolyzed solids, UHS）. The UHS mainly contains carbohydrates and lignin. Anaerobic digestion could be applied to convert those carbohydrates into CH4 and to naturally enrich lignin for further utilization, thus improving the economics of the whole biorefinery process. Here the methane production potential of UHS derived from corn stover biorefinery was investigated under different types of inoculum, diverse inoculum to substrate ratios（RI/S）and various fermentation temperatures. Results indicated that the biogas productivity of UHS was higher when using kitchen waste AD slurry as inoculum, and the cumulative methane production was up to 208.06 mL·g^-1VS. The cumulative methane production decreased with decrease in RI/S. When RI/Swas in range of 0.1∶1 to 3∶1, the cumulative methane production was between 111.20 to 224.48 mL·g^-1VS and the UHS biodegradability ranged from 27.89% to 56.29%. The biodegradability of UHS decreased as substrate concentration increased.The cumulative methane production was similar at both 55 ℃ and 35 ℃ at the same RI/S, but the biogas production rate was much higher at 55 ℃.

关 键 词：玉米秸秆 水解残渣 厌氧 甲烷 发酵 

分 类 号：X712[环境科学与工程—环境工程]