Optimizing the production of hydrogen and 1,3-propanediol in anaerobic fermentation of biodiesel glycerol

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• 作者：Bingchuan Liu^a ; Kyle Christiansen^b ; Richard Parnas^b ; Zhiheng Xu^a ; Baikun Li^a ; ^{baikun@engr.uconn.edu}
• 关键词：Anaerobic fermentation ; Biodiesel glycerol ; Hydrogen ; 1 ; 3-propanediol (1 ; 3-PD) ; Metabolic pathway ; Hydrogen retention time (HyRT)
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：19 March, 2013
• 年：2013
• 卷：38
• 期：8
• 页码：3196-3205
• 全文大小：1688 K

文摘

The conversion of glycerol in biodiesel waste streams to valuable products (e.g. hydrogen and 1,3-propanediol (1,3-PD)) was studied through batch-mode anaerobic fermentation with organic soil as inoculum. The production of hydrogen in headspace and 1,3-PD in liquid phase was examined at different hydrogen retention times (HyRTs), which were controlled by gas-collection intervals (GCIs) and initial gas-collection time points (IGCTs). Two purification stages of biodiesel glycerol (P2 and P3) were tested at three concentrations (3, 5 and 7?g/L). Longer HyRT (longer GCI and longer IGCT) led to lower hydrogen yield but higher 1,3-PD yield. The P3 glycerol at the concentration of 7?g/L had the highest 1,3-PD yield (0.65?mol/mol?glycerol_consumed) at the GCI/IGCT of 20?h/65?h and the highest hydrogen yield (0.75?mol/mol?glycerol_consumed) at the GCI/IGCT of 2.5?h/20?h), respectively. A mixed-order kinetic model was developed to simulate the effects of GCI/IGCT on the production of hydrogen and 1,3-PD. The results showed that the production of hydrogen and 1,3-PD can be optimized by adjusting HyRT in anaerobic fermentation of glycerol.