纤维素水热炭化液相与玉米秸秆混合发酵有机物转化与产气特性  

Organic matter conversion and methane production characteristics during anaerobic co-digestion of corn stover and aqueous phase derived from cellulose hydrothermal carbonization

作　　者：王浩 邸璐 王芳[1,2] 张德俐 易维明[1,2] 李永军 沈秀丽[3] WANG Hao;DI Lu;WANG Fang;ZHANG Dei;YI Weiming;LI Yongjun;SHEN Xiui(College of Agricultural Engineering and Food Science,Shandong University of Technology,Zibo 255000,Shandong,China;Shandong Research Center of Engineering&Technology for Clean Energy,Zibo 255000,Shandong,China;Academy of Agricultural Planning and Engineering,Key Laboratory of Energy Resource Utilization from Agriculture Residue,Ministry of Agriculture and Rural Affairs,Beijing 100125,China)

机构地区：[1]山东理工大学农业工程与食品科学学院,山东淄博255000 [2]山东省清洁能源工程技术研究中心,山东淄博255000 [3]农业农村部规划设计研究院,农业农村部农业废弃物能源化利用重点实验室,北京100125

出　　处：《化工进展》2023年第12期6666-6675,共10页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(52206265,52130610,52106258);山东省高等学校“青创科技支持计划”(2021KJ097);山东省重点研发计划(2019GSF110017)。

摘　　要：为实现生物质资源的无害化处理与多级利用,本研究旨在探究纤维素水热炭化液相和玉米秸秆混合发酵过程中有机物转化及产气特性。为探究水热反应条件对混合发酵过程的影响,开展了不同条件水热炭化液相与玉米秸秆混合发酵实验。结果表明,与秸秆单发酵相比,在200℃(保温30min、60min、120min)和230℃(保温60min)条件下制备的水热液相和秸秆混合发酵的产气分别提升了7.32%、4.42%、22.08%、21.76%,其中甲烷最大累积量为1387mL。水热时间的延长和水热温度升高对最终产甲烷量都具有正向的促进作用;液相中的呋喃及其衍生物等抑制物并未对混合厌氧发酵产生明显的负面效果,反而被微生物分解为糠基醇等有机物,促进产气。水热炭化液相的加入促进了氢还原二氧化碳途径产甲烷菌的生长,协同乙酸产甲烷途径,促进了甲烷的生产。本研究结果可为优化水热炭化有机废液与秸秆混合发酵工艺提供理论基础。In order to realize the harmless treatment and multi-stage utilization of biomass resources,this study aimed to explore the transformation process of organic matter and methane production characteristics during the anaerobic co-digestion of corn stover and aqueous phase derived from cellulose hydrothermal carbonization.The anaerobic co-digestion experiment of the two feedstocks was carried out.Compared with the mono-digestion,the addition of hydrothermal aqueous phase prepared at 200℃(hold on 30min,60min,120min)and 230℃(hold on 60min)increased the methane production by 7.32%,4.42%,22.08%and 21.76%,respectively,and the maximum accumulation of methane was 1387mL.The results showed that the prolongation of hydrothermal time and the increase of hydrothermal temperature had a positive effect on the final methane production.The inhibitors such as furan and its derivatives in the co-substrate did not have obvious negative effects on anaerobic co-digestion.While,it could be decomposed into furfuryl alcohol,etc.by microorganisms to promote methane production.The addition of hydrothermal carbonization aqueous phase promoted the growth of methanogens in the hydrogen reduction pathway of carbon dioxide,and promoted the production of methane in synergy with the methanogenic pathway of acetic acid.The results of this study could provide a theoretical basis for optimizing the anaerobic co-digestion process of corn stover and organic waste liquid of hydrothermal carbonization.

关 键 词：混合发酵 水热炭化 液相 玉米秸秆 菌群结构 

分 类 号：TH3[机械工程—机械制造及自动化]