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当前位置: 首页 > 文章 > 热化学预处理温度对玉米秸秆干发酵的影响 农业机械学报 2016,47 (1) 311-316
Position: Home > Articles > Effects of Thermo-chemical Pretreatment Temperature on Dry Anaerobic Digestion Transactions of the Chinese Society for Agricultural Machinery 2016,47 (1) 311-316

热化学预处理温度对玉米秸秆干发酵的影响

作  者：
吴厚凯;李志合;王绍庆;王芳;易维明
单  位：
山东理工大学农业工程与食品科学学院
关键词：
玉米秸秆;干发酵;热化学预处理;温度
摘  要：
为研究热化学处理方法对生物质干发酵制备沼气的影响,采用鼓泡流化床热解反应器在150℃、170℃、190℃和210℃下对玉米秸秆进行了热化学预处理,并与未处理的玉米秸秆原料分别进行了35℃中温发酵42 d的实验研究。结果表明,一定温度范围的热化学预处理能够改变木质纤维的束状结构,能使半纤维素的质量分数有效降低5.98%~22.25%,木质素的质量分数降低1.75%~20.99%,从而加快启动,提高甲烷产量。其中190℃处理组30 d内的累积甲烷产量比未处理组提高了16.30%,启动时间提前了2.10 d。结果表明热化学预处理能有效提高玉米秸秆干发酵甲烷产量,加快干发酵的启动速率,提高干发酵效率。
译  名：
Effects of Thermo-chemical Pretreatment Temperature on Dry Anaerobic Digestion
作  者：
Wu Houkai;Li Zhihe;Wang Shaoqing;Wang Fang;Yi Weiming;School of Agricultural and Food Engineering,Shandong University of Technology;Shandong Research Center of Engineering and Technology for Clean Energy;
关键词：
corn stalk;;dry anaerobic digestion;;thermo-chemical pretreatment;;temperature
摘  要：
The complicated fibrous-network structure of lignocellulose has adverse impact on the starting time of biomass dry anaerobic digestion. According to the pyrolytic properties of lignin,thermo-chemical pretreatment by using fluidized bed was put forward to pretreat the biomass. The present work was aim to investigate the influences of the thermo-chemical pretreatment technique on the biogas production via biomass dry anaerobic digestion. Experiments for the biogas production via biomass dry anaerobic digestion using the corn stalk samples treated at 150℃,170℃,190℃,210℃ in a fluidized bed and untreated sample were carried out at 35℃ for 42 d,respectively. Obviously,the results showed that thermo-chemical pretreatment could change the fibrous-network structure of lignocellulose. It resulted5. 98% ~ 22. 25% and 1. 75% ~ 20. 99% decrease on hemicellulose and lignin,and enhanced the methane production ranging in a certain temperature. The digestion time T80 mirrored the efficiency of fermentation,190℃ and 210℃ pretreatments got the shortest digestion time which were shorter 3 d than the untreated of 30 d. The highest methane yield of 30 d was obtained at 190℃ pretreatment biomass sample which was 16. 30% higher and the start-up time was 2. 10 d less than the untreated. Other pretreatments also improved the methane yield by 1. 67% ~ 9. 78% and resulted the start-up time less than the untreated.Although 210℃ pretreatment could destroy the structure of lignocellulose more seriously,it also led methane production reduction due to the more wastage of hemicellulose and cellulose. The conclusions could be made that thermo-chemical pretreatment technique is one of the effective methods to improve the methane production and accelerate the start-up time of dry anaerobic digestion observably.

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