Feasibility of hydrogen production from ripened fruits by a combined two-stage (dark/dark) fermentation system

作者：Hwang Jae Hoon; Choi Jeong A; Abou Shanab Reda A I; Min Booki; Song Hocheol; Kim Yongje^*; Lee Eung Seok; Jeon Byong Hun

来源：Bioresource Technology, 2011, 102(2): 1051-1058.

DOI：10.1016/j.biortech.2010.08.047

• Biohydrogen
• Two-stage fermentation
• Energy efficiency
• Ripened fruits
• Hydraulic retention time

Anaerobic fermentation for hydrogen (H(2)) production was studied in a two-stage fermentation system fed with different ripened fruit feedstocks (apple, pear, and grape). Among the feedstocks, ripened apple was the most efficient substrate for cumulative H(2) production (4463.7 mL-H(2) L(-1)-culture) with a maximum H(2) yield (2.2 mol H(2) mol(-1) glucose) in the first stage at a hydraulic retention time (HRT) of 18 h. The additional cumulative biohydrogen (3337.4 mL-H(2) L(-1)-culture) was produced in the second stage with the reused residual substrate from the first stage. The major byproducts in this study were butyrate, acetate, and ethanol, and butyrate was dominant among them in all test runs. During the two-stage system, the energy efficiency (H(2) conversion) obtained from mixed ripened fruits (RF) increased from 4.6% (in the first stage) to 15.5% (in the second stage), which indicated the energy efficiency can be improved by combined hydrogen production process. The RF could be used as substrates for biohydrogen fermentation in a two-stage (dark/dark) fermentation system.

• 出版日期2011-1