Optimization of Ethanol Production from Palmyra Sap by Zymomonus mobilis Using Response Surface Methodology

Chrisnasari, Ruth (2011) Optimization of Ethanol Production from Palmyra Sap by Zymomonus mobilis Using Response Surface Methodology. Microbiologi Indonesia, 5 (2). pp. 61-67. ISSN 2087-8575

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Abstract

Ethanol is believed to be one of the best alternatives to replace gasoline, because ethanol is a renewable energy source and environmentally friendly. The present study focuses on the optimization of palmyra sap as a source for ethanol production. Statistical experimental design using Box-Wilson central composite design (CCD) was used to optimize the quantitative effects of sugar, urea, and inoculum concentration on ethanol production. It was found that palmyra sap could be used as a substrate for ethanol production using Zymomonas mobilis (NRRL B-14234). A maximum ethanol concentration of 58.97 g L-1 was obtained after optimizing the parameters of fermentation. The optimum values of sugar, urea, and inoculums concentration were 206.01 g L-1, 3.16 g L-1, and 23.05% (v v-1), respectively, with ethanol yield of 0.3039 g g-1. A high similarity was observed between the predicted and experimental results, which reflected the accuracy and applicability of RSM to optimize the process for ethanol production.

Item Type: Article
Uncontrolled Keywords: ethanol, palmyra sap, Zymomonas mobilis, response surface methodology
Subjects: Q Science > QR Microbiology
Divisions: Faculty of Technobiology > Department of Biology
Depositing User: Adpesdam Ubaya
Date Deposited: 21 Mar 2012 07:19
Last Modified: 21 Mar 2012 07:19
URI: http://repository.ubaya.ac.id/id/eprint/241

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