Title: Production of L-Lactic Acid from Raw Cassava Starch by Rhizopus oryzae NRRL 395
Abstract: Lactic acid, which is commonly used in food, chemical and pharmaceutical industries, has recently received much attention for the production of biodegradable plastic. L-lactic acid production by Rhizopus oryzae NRRL 395 from raw cassava starch as a sole carbon source was studied. The optimum production medium was as follows (g/l) : raw cassava starch, 120; (NH 4) 2 SO4, 3.0; KH2PO4, 1.0; MgSO4.7H2O, 0.25; ZnSO4.7H2O, 0.04; pH 6.0. The maximum L-lactic acid production in shake flasks was 68.32 g/l on day 5 with the shaking speed of 200 rpm at 30°C. L ‐ lactic acid yield and productivity were 0.59 g/g substrate and 0.57 g/lh, respectively. In a jar fermentor, the maximum L-lactic acid production was 54.62 g/l on day 4 of cultivation at the agitation speed of 400 rpm and the aeration rate of 1.5 vvm. The L ‐ lactic acid yield was 0.49 g/g substrate with the productivity of 0.56 g/lh.
Publication Year: 2001
Publication Date: 2001-01-01
Language: en
Type: article
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Cited By Count: 4
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