生物炭和乙醇对油菜秸秆沼气发酵特性的影响

刘闻远; 辛娅; 王殿龙; 时号; 李相前

doi:10.19912/j.0254-0096.tynxb.2021-1341

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (3) : 277-283. DOI: 10.19912/j.0254-0096.tynxb.2021-1341

生物炭和乙醇对油菜秸秆沼气发酵特性的影响

刘闻远^1,2, 辛娅^1,2, 王殿龙^1,2, 时号^1,2, 李相前^1,2

作者信息 +

EFFECT OF BIOCHAR AND ETHANOL ON METHANE PRODUCTION IN ANAEROBIC DIGESTION OF RAPE STRAW

Liu Wenyuan^1,2, Xin Ya^1,2, Wang Dianlong^1,2, Shi Hao^1,2, Li Xiangqian^1,2

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文章历史 +

摘要

对生物炭和乙醇提高油菜秸秆厌氧发酵沼气产率进行实验研究,探索不同乙醇浓度对中温和高温厌氧发酵沼气产率、木质纤维素降解和微生物菌群结构的影响。结果表明：生物炭和乙醇可促进沼气产率和纤维素降解。随着乙醇浓度的增大,沼气产率先增大后减小,3 g/L乙醇浓度时中温和高温发酵沼气产率最高,分别为219.3和240.5 mL/g。从木质纤维素降解来看,中温发酵组纤维素含量由预处理秸秆的54.00%降至18.69%~25.03%。测序结果显示乙醇浓度为3 g/L的中温发酵沼渣中厚壁菌门和拟杆菌门相对丰度最高,揭示了生物炭和乙醇促进油菜秸秆厌氧发酵产气的机制。

Abstract

The mesophilic and thermophilic anaerobic digestion (AD) of rape straw with biochar and ethanol addition were studied. The effects of ethanol addition on the biogas yield, degradation of lignocellulose and bacterial community were explored. The results showed that biochar and ethanol addition improved the biogas yield and degradation of cellulose. The biogas yield increased first and then decreased with the increase of the ethanol dosage. When the ethanol dosage was 3 g/L, the biogas yields in mesophilic and thermophilic AD were the highest, 219.3 mL/g and 240.5 mL/g, respectively. For the lignocellulose degradation, the cellulose content in mesophilic AD with 3 g/L ethanol was reduced from 54.00% of the pretreated straw to 18.69%-25.03%.Microbial community results showed that the relative abundances of Firmicutes and Bacteroides were high in the biogas residue of mesophilic AD with 3 g/L ethanol. This revealed the mechanism of biochar and ethanol addition to promote biogas production of rape straw in AD.

导出引用

刘闻远, 辛娅, 王殿龙, 时号, 李相前. 生物炭和乙醇对油菜秸秆沼气发酵特性的影响[J]. 太阳能学报. 2023, 44(3): 277-283 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1341

Liu Wenyuan, Xin Ya, Wang Dianlong, Shi Hao, Li Xiangqian. EFFECT OF BIOCHAR AND ETHANOL ON METHANE PRODUCTION IN ANAEROBIC DIGESTION OF RAPE STRAW[J]. Acta Energiae Solaris Sinica. 2023, 44(3): 277-283 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1341

中图分类号： X705 S216.3

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