| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Research Abstract |
In the aerobic culture of Bacillus subtilis ATCC 21332 to produce a biosurfactant, foam control using a foam-breaking impeller fitted to a stirred-tank reactor succeeded. Production and enrichment of the biosurfactant were accomplished simultaneously in the stirred-tank reactor with the presence of the foam layer. The foam fractionation operation after the end of cultivation improved the recovery of biosurfactant up to 92.3%. The volume of treating liquid, which the biosurfactant was enriched, could be reduced. Therefore, this technique contributes to a lowering of running costs in separation and purification processes.
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