Direct fermentation of potato starch wastewater to lactic acid by Rhizopus oryzae and Rhizopus arrhizus

被引：0
作者：
Li Ping Huang
Bo Jin
Paul Lant
机构：
[1] Dalian University of Technology,School of Environmental and Biological Science & Technology
[2] The University of Queensland,Department of Chemical Engineering
来源：
Bioprocess and Biosystems Engineering | 2005年 / 27卷
关键词：
Fermentation; Lactic acid; Reducing sugar; Starch hydrolysis; Fungal biomass;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The biochemical kinetic of direct fermentation for lactic acid production by fungal species of Rhizopus arrhizus 3,6017 and Rhizopus oryzae 2,062 was studied with respect to growth pH, temperature and substrate. The direct fermentation was characterized by starch hydrolysis, accumulation of reducing sugar, and production of lactic acid and fungal biomass. Starch hydrolysis, reducing sugar accumulation, biomass formation and lactic acid production were affected with the variations in pH, temperature, and starch source and concentration. A growth condition with starch concentration approximately 20 g/l at pH 6.0 and 30°C was favourable for both starch saccharification and lactic acid fermentation, resulting in lactic acid yield of 0.87–0.97 g/g starch associated with 1.5–2.0 g/l fungal biomass produced in 36 h fermentation. R. arrhizus 3,6017 had a higher capacity to produce lactic acid, while R. oryzae 2,062 produced more fungal biomass under similar conditions.
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页码：229 / 238
页数：9
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