Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (7): 1258-1266.DOI: 10.1016/S2095-3119(13)60355-X

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Pretreatment of Rice Straw by Hydrogen Peroxide for Enhanced Methane Yield

  href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((SONG Zi-lin[Author]) AND 1[Journal]) AND year[Order])" target="_blank">SONG Zi-lin, href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((YAG Gai-he[Author]) AND 1[Journal]) AND year[Order])" target="_blank">YAG Gai-he, href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((FENG Yong-zhong[Author]) AND 1[Journal]) AND year[Order])" target="_blank">FENG Yong-zhong, href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((REN Guang-xin[Author]) AND 1[Journal]) AND year[Order])" target="_blank">REN Guang-xin, HAN Xin-hui   

  1. 1.College of Forestry, Northwest A&F University, Yangling 712100, P.R.China
    2.College of Agronomy, Northwest A&F University, Yangling 712100, P.R.China
    3.Research Center for Recycling Agricultural Engineering Technology of Shaanxi Province, Yangling 712100, P.R.China
  • 收稿日期:2012-09-29 出版日期:2013-07-01 发布日期:2013-07-04
  • 通讯作者: Correspondence YANG Gai-he, Mobile: 13709129773, Fax: +86-29-87092265, E-mail: gaiheyang@gmail.com
  • 基金资助:

    This work was financially supported by the Key Technologies R&D Program of China during the 11th Five-Year Plan period (2011BAD15B03), the Basic Scientific Fund of Northwest A&F University of China (QM2012002).

Pretreatment of Rice Straw by Hydrogen Peroxide for Enhanced Methane Yield

 SONG Zi-lin, YAG Gai-he, FENG Yong-zhong, REN Guang-xin, HAN Xin-hui   

  1. 1.College of Forestry, Northwest A&F University, Yangling 712100, P.R.China
    2.College of Agronomy, Northwest A&F University, Yangling 712100, P.R.China
    3.Research Center for Recycling Agricultural Engineering Technology of Shaanxi Province, Yangling 712100, P.R.China
  • Received:2012-09-29 Online:2013-07-01 Published:2013-07-04
  • Contact: Correspondence YANG Gai-he, Mobile: 13709129773, Fax: +86-29-87092265, E-mail: gaiheyang@gmail.com
  • Supported by:

    This work was financially supported by the Key Technologies R&D Program of China during the 11th Five-Year Plan period (2011BAD15B03), the Basic Scientific Fund of Northwest A&F University of China (QM2012002).

摘要: A pretreatment process for hydrogen peroxide (H2O2) was optimized to enhance the biodegradation performance of rice straw and increase biogas yield. A determination experiment was conducted under predicted optimal conditions. Optimization was implemented using response surface methodology. The effects of biodegradation and the interactive effects of pretreatment time (PT), H2O2 concentration (HC), and substrate to inoculum ratio (S/I) on methane yield were investigated. The lignin, cellulose, and hemicellulose of rice straw were significantly degraded with increasing HC. The optimal conditions for the use of pretreated rice straw in anaerobic digestion were a 6.18-d PT, 2.68% HC (w/w total solid), and 1.08 S/I; these conditions result in a methane yield of 288 mL g-1 volatile solids (VS). A determination coefficient of 95.2% was obtained, indicating that the model used to predict the anabolic digestion process has a favorable fit with the experimental parameters. The determination experiment resulted in a methane yield of 290 mL g-1 VS, 88.0% higher than that of untreated rice straw. Thus, H2O2 pretreatment of rice straw can be used to improve methane yields during biogas production.

关键词: hydrogen peroxide , pretreatment , methane yield , response surface methodology

Abstract: A pretreatment process for hydrogen peroxide (H2O2) was optimized to enhance the biodegradation performance of rice straw and increase biogas yield. A determination experiment was conducted under predicted optimal conditions. Optimization was implemented using response surface methodology. The effects of biodegradation and the interactive effects of pretreatment time (PT), H2O2 concentration (HC), and substrate to inoculum ratio (S/I) on methane yield were investigated. The lignin, cellulose, and hemicellulose of rice straw were significantly degraded with increasing HC. The optimal conditions for the use of pretreated rice straw in anaerobic digestion were a 6.18-d PT, 2.68% HC (w/w total solid), and 1.08 S/I; these conditions result in a methane yield of 288 mL g-1 volatile solids (VS). A determination coefficient of 95.2% was obtained, indicating that the model used to predict the anabolic digestion process has a favorable fit with the experimental parameters. The determination experiment resulted in a methane yield of 290 mL g-1 VS, 88.0% higher than that of untreated rice straw. Thus, H2O2 pretreatment of rice straw can be used to improve methane yields during biogas production.

Key words: hydrogen peroxide , pretreatment , methane yield , response surface methodology