生物炭和乙醇对油菜秸秆沼气发酵特性的影响  

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

作　　者：刘闻远 辛娅 王殿龙 时号 李相前 Liu Wenyuan;Xin Ya;Wang Dianlong;Shi Hao;Li Xiangqian(School of Life Science and Food Engineering,Huaiyin Institute of Technology,Huaian 223003,China;Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration,Huaian 223003,China)

机构地区：[1]淮阴工学院生命科学与食品工程学院,淮安223003 [2]江苏省生物质转化与过程集成重点实验室,淮安223003

出　　处：《太阳能学报》2023年第3期277-283,共7页Acta Energiae Solaris Sinica

基　　金：江苏省自然科学基金青年基金项目(BK20191053,BK20191054)。

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。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.

关 键 词：沼气 秸秆 生物炭 乙醇 厌氧消化 

分 类 号：X705[环境科学与工程—环境工程] S216.3[农业科学—农业机械化工程]