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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 6    June 2017

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Simultaneous production of hydrogen and volatile fatty acids from anaerobic digestion of Macrocystis pyrifera biomass residues
ZHAO Xiao-xian(赵晓娴)1, 2, FAN Xiao-lei(范晓蕾)1, XUE Zhi-xin(薛志欣)2, YANG Zhi-man(杨智满)1,YUAN Xian-zheng(袁宪政)1, QIU Yan-ling(邱艳玲)1, GUO Rong-bo(郭荣波)1

1. Shandong Industrial Engineering Laboratory of Biogas Production & Utilization (Key Laboratory of Biofuels),
Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China;
2. College of Chemical Science and Engineering, Qingdao University, Qingdao 266071, China

Abstract:The Macrocystis pyrifera biomass residues (MPBRs) after extraction of algin could be applied in anaerobic fermentation. The effects of different pretreatment conditions, substrate concentrations and initial pH values on hydrogen and volatile fatty acid (VFA) production during the anaerobic fermentation of MPBRs were evaluated. The optimal pretreatment conditions, substrate concentration, initial pH values were determined as thermo-alkaline pretreatment at 100 °C with 0.1 mol/L NaOH, 40 g/L and 7.0, respectively. Under these conditions, the maximum hydrogen production was 11.38 mL/g (volatile solids, VS), which was approximately 23 times higher than that of untreated MPBRs. Furthermore, the maximum total volatile fatty acid (TVFA) yield was found to be 0.055 g/g (VS) and the VFA mainly consisted of acetic and butyric acids. The results indicate that the yield of TVFA is positively correlated with hydrogen production, and the MPBRs could produce hydrogen and TVFA simultaneously. In addition, thermo-alkaline pretreatment is proven to be the best method for hydrogen and VFA production.

 

Key words: Macrocystis pyrifera biomass residues; pretreatment; fermentation; hydrogen

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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