Journal of Hebei University (Natural Science Edition) ›› 2016, Vol. 36 ›› Issue (1): 58-64.DOI: 10.3969/j.issn.1000-1565.2016.01.010

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Optimization design of anaerobic fermentation with mixed materials of bean stalk and rice straw

DENG Yuanfang1,2,XU Jiaxing1.2,LIU Xiaoyan1,2,DAI Benlin1,2,XU Jiming1,2   

  1. 1.Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huaian 223300, China; 2.Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaiyin Normal University, Huaian 223300, China
  • Received:2015-06-25 Online:2016-01-25 Published:2016-01-25

Abstract: This experiment use fresh bean stalk and natural withering rice straw as fermentation materials.On the basis of earlier single factor test,three factors five levels quadratic regression orthogonal rotating combination design was adopted in this study,and only the accumulative gas production was involved in the response value.Effects of three factors on anaerobic fermentation were analyzed,including the environment of anaerobic fermentation temperature,dry-fresh TS ratio,inoculation percentage and the mathematical model for anaerobic mixed fermentation of bean stalk and rice straw was developed.The regression equation was optimized and analyzed when the optimum conditions and interactive effects were exposed.The results showed that the quadratic model had the optimal fitting data.The sequence of factors effecting anaerobic fermentation was inoculation percentage,the environment of anaerobic fermentation temperature - 收稿日期:2015-06-25 基金项目:国家自然科学基金青年科学基金资助项目(21406083);江苏省生物质能与酶技术重点实验室资助项目(JSBEET1211) 第一作者:邓媛方(1985—),女,河南南阳人,淮阴师范学院讲师,主要从事生物质能研究.E-mail:dengyf@hytc.edu.cn 通信作者:许家兴(1986—),男,山东日照人,淮阴师范学院副教授,博士,主要从事生物质能研究.E-mail:xujiaxing@hytc.edu.cnand dry-fresh TS ratio.The optimum conditions for dry-fresh mixed-fermentation were determined as follows:the temperature was 28.97 ℃,dry-fresh TS ratio of fresh bean stalk and rice straw was 2.23∶1,inoculation percentage was 30.11% and prediction value of TS production rate was 279.789 L/kg.Through testing with related experimental data,the relative deviation of biogas production between experiment measurement and model prediction was 0.23 %(F<0.01),which proved the multiple regression model had high fitting degree and applicability.This study could provide certain theory reference for materials anaerobic digestion of mixed straw material.

Key words: biogas, straw, anaerobic digestion, model optimization

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