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| Production of Monascus pigments by solid-state fermentation of soybean dregs with Monascus purpureus |
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| KeyWord:soybean dregs solid-state fermentation Monascus purpureus Monascus pigment |
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| Abstract: |
| Feasibility for the production of Monascus pigments by solid-state fermentation of soybean dregs with Monascus purpureus was investigated. Soybean dregs was selected as the optimum solid-state fermentation medium for producing Monascus pigments from five different raw materials. On the basis of single factor experiment, the optimal medium composition for the production of Monascus pigments by solid-state fermentation of soybean dregs with Monascus purpureus was obtained by orthogonal experiment as follows: initial moisture content of soybean dregs 50%, glycerol 6%, NaNO3 0.04%, KH2PO4 0.3%, MgSO4 0.2% and VC 2.2%. The optimal culture conditions were obtained as follows:humidity 60%-65%, inoculation amount 8%, fermentation time 12 d and fermentation temperature 30?℃. Under the optimal conditions, the content of Monascus pigments in fermented soybean dregs was (6.03±0.11) mg/g. The results indicated that it was feasible to produce Monascus pigments by solid-state fermentation of soybean dregs with Monascus purpureus to achieve the reutilization of soybean dregs with high-value through fermentation process. |
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