Improving agricultural straw preparation logistics stream in bio-methane production: experimental studies and application analysis

文献类型： 外文期刊

第一作者： Luo Tao

作者： Luo Tao;Huang Hailong;Long Yan;Xiong Xia;Huang Ruyi;Mei Zili;Pan Junting;Meng Xi

作者机构：

关键词： Feedstock;Biomass densification;Model;Biogas plant;Corn stove

期刊名称：3 BIOTECH （ 影响因子：2.406； 五年影响因子：3.203 ）

ISSN： 2190-572X

年卷期： 2017 年 7 卷

页码：

收录情况： SCI

摘要： Long-term production in commercial straw biogas plants has been rare in China due to inefficiencies in the logistics stream. Biomass densification could be a potential solution to this issue. Therefore, we conducted a study to evaluate whether biomass densification is a more efficient and sustainable option. We performed methane production experiments to investigate fermentation characteristics of briquettes (with a new pretreatment, model II) and rubs (with a common pretreatment, model I). A 3000-m(3) biogas plant was used to conduct a comparative analysis with solar eMergy joules. Results showed that the methane yield of briquettes of corn stover was 66.74% higher than that of rubs, and the briquettes had better digestion performance in terms of CH4 content, VFA, and alcohol. The two models required almost the same eMergy investment input, while model II obtained a greater quantity of net eMergy (16.5% higher) in comparison with model I. The net eMergy yield ratio (EYR) (biogas only) of model I and model II was 0.99 and 1.67, respectively, showing less market competitiveness for commercial operations with model I. Meanwhile, the logistic costs of model II could be reduced to approximately US $34,514 annually.

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