Anaerobic digestion of ammonia-pretreated corn stover

被引：42

作者：

Yuan, Hairong ^{[1
]}

Li, Rongping ^{[2
]}

Zhang, Yatian ^{[3
]}

Li, Xiujin ^{[1
]}

Liu, Chunmei ^{[1
]}

Meng, Ying ^{[1
]}

Lin, Meina ^{[1
]}

Yang, Ziyi ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Ctr Resources & Environm Res, Beijing 100029, Peoples R China

[2] Beijing Environm Sanitat Engn Res Inst, Beijing 100028, Peoples R China

[3] Capital Aerosp Machinery Co, Beijing 100076, Peoples R China

来源：

BIOSYSTEMS ENGINEERING | 2015年 / 129卷

关键词：

Anaerobic digestion; Ammonia-pretreated; Moisture content; Corn stover; AQUEOUS AMMONIA; STRAW; TEMPERATURE;

D O I：

10.1016/j.biosystemseng.2014.09.010

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The effect of ammonia pretreatment on the anaerobic digestibility of corn stover was investigated. Corn stover with different moisture contents (30%, 50%, 70%, and 90%) was pretreated with three concentrations of ammonia (2%, 4%, and 6%) at 35 +/- 2 degrees C for the following batch digestion. Results showed that the reagent of 4% ammonia and 70% moisture content could achieve the highest anaerobic digestibility. In comparison with the untreated, the time needed to produce 90% of the maximum digester gas production (T-90) shortened from 52 d to 37 d. The total biogas production and the unit volatile solids (VS) biogas yield were 20,740 ml and 427.1 ml respectively, both 26.70% higher than the untreated. It was found that the digesters with high moisture contents of 70% and 90% were more stable and had shorter acidification periods relative to the low moisture contents of 30% and 50%. The decreases in cellulose, hemicelluloses and lignin indicated that ammonia pretreatment could destroy the lignocellulose (LCH) structure and furthermore enhance the biogas production. Following anaerobic digestion, 80.6% of cellulose and 68.52% of hemicelluloses were consumed where there was 4% ammonia and 70% moisture content, indicating why these conditions produced the highest level of biogas. (C) 2014 IAgrE. Published by Elsevier Ltd. All rights reserved.

引用

页码：142 / 148

页数：7

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