Design of a Continuous Bioreactor for Laboratory Scale Production of Ethanol from Cassava Starch Hydrolysate Using Saccharomyces cerevisiae

  • O.S. Alade Biotechnology Department Bells University of Technology, Ota, Ogun State, Nigeria.
  • Eriola Betiku Biochemical Engineering Laboratory Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.
Keywords: Bioethanol production, Bioreactor design, Cassava starch, Saccharomyces cerevisiae

Abstract

In this work, Microsoft excel spreadsheet was employed to design a 5L laboratory scale continuous bioreactor with kinetic data obtained from the previous batch fermentation process for bioethanol production from cassava starch hydrolysate using Saccharomyces cerevisiae. This was achieved by dividing the whole system into various modules (Vessel dimensions, Agitation system design, and Power requirement for agitation, Material and Energy Balance, and / or Temperature control) and linking various cells from the spreadsheet for each module with one and other. The vessel height and diameter are 0.30 m and 0.15 m, respectively using the aspect ratio of 2. The agitation system comprises 4 baffles and 3 six-blade rushton turbine impellers (speed of 200 rpm and power required for agitation calculated as 5.2 x 10-4 W). The mass flow rates of feed and of ethanol in the product stream are 9.11 x 10-6 kg/s and 2.2 x 10-6 kg/s, respectively. The system is to be maintained at 30 oC using tap-water as coolant. It also has 4.88 x 10-4 m2 as the area available for heat transfer and the length of the cooling coil required for this is calculated as 6.63 x 10-3 m.

Author Biographies

O.S. Alade, Biotechnology Department Bells University of Technology, Ota, Ogun State, Nigeria.

Biotechnology Department

Bells University of Technology, Ota, Ogun State, Nigeria.

Eriola Betiku, Biochemical Engineering Laboratory Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.

Biochemical Engineering Laboratory

Department of Chemical Engineering,

Obafemi Awolowo University,

Ile-Ife, Osun State, Nigeria.

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Published
2010-05-01
How to Cite
Alade, O., & Betiku, E. (2010). Design of a Continuous Bioreactor for Laboratory Scale Production of Ethanol from Cassava Starch Hydrolysate Using Saccharomyces cerevisiae. Ife Journal of Technology, 19(2), 15-20. Retrieved from http://ijt.oauife.edu.ng/index.php/ijt/article/view/60