不同接种污泥预处理对玉米乙醇废水厌氧发酵产氢的影响  

Effects of different pretreatments of inoculated sludge on hydrogen production by anaerobic fermentation of corn ethanol wastewater

作　　者：郑展耀 杨红 尹芳[1] 张无敌[1] 赵兴玲[1] 刘士清[1] 吴凯 王昌梅[1] 柳静[1] ZHENG Zhanyao;YANG Hong;YIN Fang;ZHANG Wudi;ZHAO Xingling;LIU Shiqing;WU Kai;WANG Changmei;LIU Jing(School of Energy and Environmental Sciences,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学能源与环境科学学院

出　　处：《河南农业大学学报》2019年第6期941-949,共9页Journal of Henan Agricultural University

基　　金：国家自然科学基金项目(51366015);云南省应用基础研究计划青年项目(2018FD018);西南地区可再生能源研究与开发协同创新中心联合资助项目(05300205020516009)

摘　　要：采用热处理、碱处理、酸处理和重复曝气处理4种方法对厌氧活性污泥进行预处理,以此提高处理玉米乙醇废水(COD为20000 mg·L-1)发酵产氢的效率。结果表明,重复曝气处理、酸处理为乙醇乙酸型发酵,热处理、碱处理、未处理为丁酸型发酵。试验数据经过修改Modified Gompertz模型处理,获得的厌氧消化动力学参数(最大累积产气量、最大产气速率和滞留时间),并计算出TS、VS评价指标。Modified Gompertz模型拟合不同预处理接种污泥对玉米乙醇废水厌氧发酵累积产气量随时间变化具有较好相关性,拟合结果中与未经处理的接种污泥相比,重复曝气处理、酸处理产氢效果较好,热处理、碱处理产氢效果较差。其中,重复曝气预处理种泥产氢效果最好,发酵累积产氢量222 mL,与未处理组相比提高了25.68%,最大产氢速率6.51 mL·h-1,总固体产氢率、挥发性固体产氢率分别为36.19、64.24 mL·g-1,优于其他处理组与对照组。因此,重复曝气可能成为生物制氢较理想的预处理方法。To improve the efficiency of hydrogen production by fermentation of corn alcohol wastewater(COD of 2000 mg·L-1),the anaerobic activated sludge was pretreated by four methods including heat,alkalization,acidization,and repeated aeration treatments.The experimental data were analyzed by the Modified Gompertz model to obtain the kinetic parameters of anaerobic digestion(maximum cumulative gas production,maximum gas production rate and residence time),and the evaluation indexes of TS and VS were calculated.The results showed that repeated aeration and acidization treatment were ethanol-acetic acid fermentation,while heat treatment,alkalization and untreated were butyric acid fermentation.The cumulative gas production of anaerobic fermentation of corn alcohol wastewater which fitted by Modified Gompertz model in different pretreatments of inoculated sludge have a good correlation with the time.Compared with untreated inoculated sludge group,the effect of repeated aeration and acidization treatment on hydrogen production was better than those of heat treatment and alkalization.The repeated aeration pretreatment had the highest gas production;the cumulative gas production was 222 mL and increased by 25.68%compared with the untreated group.The maximum gas production rate was 6.51 mL·h-1,the total solid gas production rate and volatile solid gas production rate were 36.19 mL·g-1 and 64.24 mL·g-1,respectively.Therefore,repeated aeration might be an ideal pretreatment method for biohydrogen production.

关 键 词：发酵产氢 接种污泥预处理 玉米乙醇废水 Modified Gompertz模型 

分 类 号：S216[农业科学—农业机械化工程]