期刊
ENZYME AND MICROBIAL TECHNOLOGY
卷 110, 期 -, 页码 1-7出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.enzmictec.2017.11.009
关键词
Distillery wastewater; Hydrogen production; Purple bacteria; Dark fermentation; Photofermentation
资金
- RSF (Russia) [15-14-30007]
- Russian Science Foundation [15-14-30007] Funding Source: Russian Science Foundation
In this study, distillery wastewater was treated by dark fermentation or photofermentation alone, and by sequential dark and photofermentation processes using anaerobic saccharolytic consortium and purple nonsulfur bacteria. Combination of dark and photofermentation resulted in the maximal H-2 yield of 17.6 L/L of distillery waste with chemical oxygen demand 40 g/L. It is equivalent to 205 kJ/L distillery wastewater and corresponds to recovery of approximately 4-8% of energy consumed during ethanol production. Optimal performance of photofermentation was observed at 20% concentration of pre-fermented distillery waste. In photofermentation, the range of the suitable distillery waste concentrations was extended and the H2 yield was improved by choosing the tolerant strain of purple bacteria Rhodobacter sphaeroides B-3059. After two stages, organic acids and sugars were completely consumed that means wastewater treatment concomitant to Hy production.
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