Utilization of excess sludge by acetone-butanol-ethanol fermentation employing Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564) |
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Authors: | Kobayashi Genta Eto Koji Tashiro Yukihiro Okubo Kenichi Sonomoto Kenji Ishizaki Ayaaki |
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Affiliation: | Laboratory of Microbial Technology, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan. gentak@agr.kyushu-u.ac.jp |
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Abstract: | Clostridium saccharoperbutylacetonicum N1-4 could not grow or produce butanol in excess sludge medium. However, adding glucose to the excess sludge medium resulted in a specific growth rate and butanol productivity of 0.29 h(-1) and 0.55 g/l/h, respectively, and the final butanol production reached 9.3 g/l. Since the content of suspended solids in medium reduced to less than 50% of the initial content during acetone-butanol-ethanol (ABE) fermentation, the sludge was quantitatively decreased by this fermentation employing this strain. |
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