Optimization of Hydrogen Production by Response Surface Methodology Using γ-Irradiated Sludge as Inoculum

详细信息    查看全文

• 作者：Yanan Yin ; Jianlong Wang
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：May 19, 2016
• 年：2016
• 卷：30
• 期：5
• 页码：4096-4103
• 全文大小：432K
• 年卷期：0
• ISSN：1520-5029

文摘

The temperature, initial pH, and substrate concentration on fermentative hydrogen production was optimized by the Box–Behnken design using γ-irradiated sludge as inoculum, and the fermentation process was analyzed at optimal conditions. The experimental results showed that the maximum cumulative hydrogen production was 3000 mL of Hb>2b>/L of medium and the hydrogen yield was 1.81 mol of Hb>2b>/mol of glucose, at 32.9 °C, with an initial pH of 7.92 and a glucose concentration of 17.0 g/L. The highest hydrogen production rate was accompanied by the exponential growth of microorganisms. The mixed cultures underwent the mixed-acid-type fermentation in the first 10 h and then changed to the acetate butyrate pathway until the end of fermentation. The hydrogen yield showed a positive relationship with acetate generation during the fermentation process.