Making lignin accessible for anaerobic digestion by wet-explosion pretreatment

被引：75

作者：

Ahring, Birgitte K. ^{[1
]}

Biswas, Rajib ^{[1
]}

Ahamed, Aftab ^{[1
]}

Teller, Philip J. ^{[1
]}

Uellendahl, Hinrich ^{[2
]}

机构：

[1] Washington State Univ, BSEL, Richland, WA 99354 USA

[2] Aalborg Univ, Sect Sustainable Biotechnol, Copenhagen, Denmark

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 175卷

关键词：

Methane; Anaerobic digestion; Sustainability; Wet explosion pretreatment; Feedlot manure; BIOGAS PRODUCTION; LIGNOCELLULOSIC BIOMASS; ENZYMATIC-HYDROLYSIS; DEGRADATION; MANURE; FUNGI; BIODEGRADATION; OPTIMIZATION; TECHNOLOGIES; PRODUCTS;

D O I：

10.1016/j.biortech.2014.10.082

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Lignin is a major part of the recalcitrant fraction of lignocellulose and in nature its degradation occurs through oxidative enzymes along with microbes mediated oxidative chemical actions. Oxygen assisted wet-explosion pretreatment promotes lignin solubility and leads to an increase biodegradation of lignin during anaerobic digestion processes. The pretreatment of feedlot manure was performed in a 10 L reactor at 170 degrees C for 25 min using 4 bars oxygen and the material was fed to a continuous stirred tank reactor operated at 55 degrees C for anaerobic digestion. Methane yield of untreated and pretreated material was 70 +/- 27 and 320 +/- 36 L/kg-VS/Day, respectively, or 4.5 times higher yield as a result of the pretreatment. Aliphatic acids formed during the pretreatment were utilized by microbes. 44.4% lignin in pretreated material was actually converted in the anaerobic digestion process compared to 12.6% for untreated material indicating the oxygen assisted explosion promoted lignin degradation. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：182 / 188

页数：7