Diacetyl fermentation coupled with pervaporation using oleyl alcohol supported liquid membrane |
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| Authors: | N Ishii M Matsumura H Kataoka H Tanaka K Araki |
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| Institution: | (1) Institute of Applied Biochemistry, University of Tukuba, 1-1-1, Tennodai, Tukuba-shi, 305 Ibaraki-ken, Japan;(2) Energy & Environmental Project Division, Chiyoda Corporation, 32-23, Tsurumichuo 4-chome, Tsurumi-ku, 230 Yokohama, Japan |
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| Abstract: | Pervaporation using oleyl alcohol supported liquid membrane was successfully applied to diacetyl fermentation by immobilized
lactic acid bacteria. Diacetyl productivity was about 10 g·m−3·h−1, while productivity during batch fermentation was about 6 g·m−3·h−1. Diacetyl yield from consumed glucose was about 0.04 g·g−1 which was 4 times as large as that of batch fermentation. The pervaporation functioned favorably on actual fermentation broth.
The flux of the permeate and the diacetyl separation factor for the pervaporation were about 9 g·m−2·h−1 and 36, respectively, and these values were maintained at almost constant levels during fermentation. Diacetyl concentration
in the permeate was about 2 kg·m−3, which is sufficiently high for commercial use. |
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