温度对玉米秸秆厌氧发酵产甲烷潜力和动力学的影响  

Influence of Temperature on The Potential and Kinetics of Methane Production from Anaerobic Digestion of Corn Stover

作　　者：于思淼 王春爽 张楷鑫 郭利利 黄思思 王彦杰[1] 付海兵 毕少杰[1] Yu Simiao;Wang Chunshuang;Zhang Kaixin;Guo Lili;Huang Sisi;Wang Yanjie;Fu Haibing;Bi Shaojie(College of Life Science and Biotechnology,Heilongjiang Bayi Agricultural University,Daqing 163319;Harbin Weike Biotechnology Co.,Ltd.)

机构地区：[1]黑龙江八一农垦大学生命科学技术学院,大庆163319 [2]哈尔滨维科生物技术有限公司

出　　处：《黑龙江八一农垦大学学报》2025年第2期75-81,118,共8页journal of heilongjiang bayi agricultural university

基　　金：2023年黑龙江八一农垦大学研究生创新科研项目(YJSCX2023-Y65);黑龙江八一农垦大学学成、引进人才科研启动计划(XYB202022);黑龙江八一农垦大学定向培养(引进人才)科研启动基金项目(XYB202318)。

摘　　要：利用厌氧发酵处理玉米秸秆以生产甲烷是一种有效的资源化利用方法。适宜的温度能够提高甲烷产量。研究使用玉米秸秆进行批次厌氧发酵试验,旨在探究不同温度(32、37、42、47、52℃)对玉米秸秆产甲烷的潜力及动力学特性的影响。结果表明:随着温度的升高,玉米秸秆的累积甲烷产率呈现先增后降的趋势。在47℃时,累积甲烷产率达到最高值,为187.6 mL·g^(-1)。运用Gompertz模型和两阶段动力学模型对不同温度下玉米秸秆的厌氧发酵过程进行拟合和动力学分析,结果显示,该过程可分为快速产气期和慢速产气期两个阶段。随着温度升高,快速产甲烷阶段在总产气率中所占比例呈上升趋势。在47℃温度条件下,快速产甲烷阶段持续时间(3.5 d)和甲烷产量(137.9 mL·g^(-1))均高于其他温度。因此,综合考虑产甲烷潜力和动力学特性,47℃温度条件是玉米秸秆的厌氧发酵制取甲烷的最适温度。Anaerobic digestion(AD)is an effective method for methane production from corn stover,and a suitable temperature can enhance methane yield.Batch AD experiments were conducted using corn stover to investigate the effects of different temperatures(32,37,42,47,52℃)on methane potential and kinetic characteristics.The results showed that as the AD temperature incre-ased,the cumulative methane yield of corn stover exhibited an initial increase followed by a decrease,reaching the highest value at 47℃,which was 187.6 mL·g^(-1).The cumulative methane production data of corn stover AD were fitted using the Gompertz and two-stage kinetic models for kinetic analysis.The AD of corn stover was found to have distinct characteristics of two stages:a fast gas production phase and a slow gas production phase.With the increase in AD temperature,the proportion of methane production in the fast gas production phase in the total gas production rate showed an upward trend,with the most extended duration of the fast methane production phase and the highest methane yield observed at 47℃,reaching 137.9 mL·g^(-1) over 3.5 days.Therefore,consid-ering the methane potential and kinetic characteristics,the AD temperature of 47℃was most favorable for the AD of corn stover for methane production.

关 键 词：厌氧发酵 玉米秸秆 产甲烷潜能 温度 产甲烷动力学 

分 类 号：X705[环境科学与工程—环境工程]