Improving the biogas yield of manure: Effect of pretreatment on anaerobic digestion of the recalcitrant fraction of manure

被引：58
作者：
Khan, Muhammad Usman [1 ,3 ]
Ahring, Birgitte Kiaer [1 ,2 ,3 ]
机构：
[1] Washington State Univ, Bioprod Sci & Engn Lab, Richland, WA 99354 USA
[2] Gene & Linda Voiland Sch Chem Engn & Bioengn, Pullman, WA 99163 USA
[3] Washington State Univ, Biol Syst Engn, Pullman, WA 99163 USA
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 321卷
关键词：
Anaerobic digestion; Methane yield; Digested Manure Fibers; Variable Pretreatment conditions; Composition analysis; ALKALINE PRETREATMENT; SODIUM-HYDROXIDE; SOLID-STATE; RICE STRAW; HEMICELLULOSES; CONVERSION; BIOFIBERS; PEROXIDE; FIBERS; CORN;
D O I：
10.1016/j.biortech.2020.124427
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Anaerobic digestion of animal manure show a maximum of ca. 50% conversion of volatile solids due to recalcitrance of lignin and crystalline cellulose under anaerobic conditions. The aim of this study is to evaluate different pretreatments on anaerobic digestion of manure fibers after anaerobic digestion. Physical, chemical, thermal, and thermal combined with alkaline pretreatments using sodium hydroxide were tested on manure fiber fraction separated out after anaerobic digestion of cow manure. The anaerobic digestion after pretreatment along with untreated controls were done in semi-continuous anaerobic bioreactors. All pretreatments showed positive effect and the highest increase in VS conversion (42.4%) and methane yield (ca. 127%) was found for 3% NaOH pretreated sample at 180 degrees C. Composition analysis showed that cellulose, hemicellulose and lignin in digested manure fibers were optimally reduced by 24.8, 29.1 and 9.5% respectively during pretreatment and 76.5% of cellulose and 84.9% of hemicellulose was converted to methane during AD.
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页数：9
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