کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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685491 | 889041 | 2007 | 9 صفحه PDF | دانلود رایگان |
Sago starch was hydrolyzed using either chemical agents, or enzymes at various pH and concentrations. Hydrolysis using 5000 AUN/ml (0.5%, w/v) glucoamylase exhibited the highest itaconic acid yield up to 0.36 g/g sago starch, whereas hydrolysis using nitric acid at pH 2.0 yielded 0.35 g/g sago starch. The medium was optimized and the composition was (g/l) 140 sago starch, 1.8 corn steep liquor, 1.2MgSO4 · 7H2O and 2.9NH4NO3. When the optimal conditions of hydrolysis and medium composition were applied to itaconic acid production in a 3-l jar fermentor, the itaconic acid production was 48.2 g/l with a yield of 0.34 g/g sago starch. This was filtered from the cultured broth and 37.1 g of itaconic acid was recovered with a purity of 97.2%. This result showed that sago starch could be converted to a value-added product with only a simple pretreatment.
Journal: Bioresource Technology - Volume 98, Issue 17, December 2007, Pages 3329–3337