A two-stage anaerobic bioconversion of corn stover: Impact of pure bacterial pretreatment on methane production

被引：9

作者：

Ali, Nasir ^{[1
]}

Hamouda, Hamed, I ^{[1
,2
,3
]}

Su, Hang ^{[1
,2
]}

Feng, Jie ^{[1
]}

Liu, Zi-Yong ^{[1
]}

Lu, Ming ^{[1
]}

Li, Fu-Li ^{[1
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Shandong Prov Key Lab Synthet Biol, Key Lab Biofuels, Qingdao 266101, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

[3] Egyptian Petr Res Inst, Cairo 11727, Egypt

来源：

ENVIRONMENTAL TECHNOLOGY & INNOVATION | 2020年 / 20卷

基金：

中国国家自然科学基金;

关键词：

Pretreatment; Corn stalk; Anaerobic digestion; Caldicellulosiruptor species; Methane; RICE STRAW; ENZYMATIC-HYDROLYSIS; MICROAEROBIC PRETREATMENT; LIGNOCELLULOSIC BIOMASS; MICROALGAL BIOMASS; WHEAT-STRAW; SP NOV; DEGRADATION; CELLULOSE; ENZYMES;

D O I：

10.1016/j.eti.2020.101141

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Biological pretreatment is feasible for enhancing methane generation with crop residues. Improvement of the degradation efficiency of cellulose has always been the key to improve methane yield. The role of an anaerobic and thermophilic bacterium, Caldicellulosiruptor sp. F32, on the degradation of corn stalk was investigated. A pure bacterial pretreatment system (0.20 v/v), with 20 times CFU of 2.20x108 was verified to be beneficial to the deterioration of corn stalk residues and the increase of methane output. The highest methane yield was 250.2 mL/g volatile solid, which was 28% higher than that from the untreated group. In group 4, the concentrations of glucose and volatile fatty acids were higher than those in other groups. Furthermore, the assays by Fourier transform infrared spectra and X-ray diffraction revealed that the crystallinity indexes of pretreated groups declined. Hence, biology-based pretreatment using pure bacterial system, Caldicellulosiruptor sp. F32, is a potentially effective approach to improve the degradation efficiency of lignocellulosic biomass. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：11