Development of a Practical and Cost-Effective Medium for Bioethanol Production from the Seaweed Hydrolysate in Surface-Aerated Fermentor by Repeated-Batch Operation
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Title
- Development of a Practical and Cost-Effective Medium for Bioethanol Production from the Seaweed Hydrolysate in Surface-Aerated Fermentor by Repeated-Batch Operation
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Author(s)
- Lee, Sang-Eun; Lee, Ji-Eun; Shin, Ga-Young; Choi, Woon Yong; Kang, Do Hyung; Lee, Hyeon-Yong; Jung, Kyung-Hwan
- KIOST Author(s)
- Kang, Do Hyung(강도형)
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Alternative Author(s)
- 강도형
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Publication Year
- 2012-01
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Abstract
- To develop a practical and cost-effective medium for bioethanol production from the hydrolysate of seaweed Sargassum sagamianum, we investigated the feasibility and performance of bioethanol production in CSL (corn-steep liquor)-containing medium, where yeast Pichia stipitis was used and the repeated batch was carried out in a surface-aerated fermentor. The optimal medium replacement time during the repeated operation was determined to be 36 h, and the surface aeration rates were 30 and 100 ml/min. Under these conditions, the repeated-batch operation was successfully carried out for 6 runs (216 h), in which the maximum bioethanol concentrations reached about 11-12 g/l at each batch operation. These results demonstrated that bioethanol production could be carried out repeatedly and steadily for 216 h. In these experiments, the total cumulative bioethanol production was 57.9 g and 58.0 g when the surface aeration rates were 30 ml/min and 100 ml/min, respectively. In addition, the bioethanol yields were 0.43 (about 84% of theoretical value) and 0.44 (about 86% of theoretical value) when the surface aeration rates were 30 ml/min and 100 ml/min, respectively. CSL was successfully used as a medium ingredient for the bioethanol production from the hydrolysate of seaweed Sargassum sagamianum, indicating that this medium may be practical and cost-effective for bioethanol production.
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ISSN
- 1017-7825
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/3700
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DOI
- 10.4014/jmb.1106.06019
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Bibliographic Citation
- JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, v.22, no.1, pp.107 - 113, 2012
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Publisher
- KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
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Subject
- CORN STEEP LIQUOR; ETHANOL-PRODUCTION; SUGARS; WATER; ACID
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Keywords
- Corn-steep liquor; bioethanol; seaweed Sargassum sagamianum; repeated-batch fermentor culture; surface aeration
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Type
- Article
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Language
- English
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Document Type
- Article
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