Optimization of operational parameters for ethanol production from Korean food waste leachate
- 178 Downloads
Recently, research on the production of ethanol from waste has been accelerating for both ecological and economical reasons, primarily for its use as an alternative to petroleum based fuels. In this study, response surface methodology based 23 -full factorial central composite design was employed to optimize the parameters of ethanol production from Korean food waste leachate. The reducing sugar concentration of the food waste leachate determined by the dinitrosalicylic acid method was 75 g/L. A second order polynomial model was developed to evaluate the quantitative effects of temperature, pH and reducing sugar concentration in order to find an optimum condition for the ethanol production from food waste leachate. From the experimental result, maximum ethanol concentration of 24.17 g/L was obtained at the optimum condition of temperature (38 °C), pH (5.45) and reducing sugar concentration (75 g/L). The experimental value (24.17 g/L) agreed very well with the predicted one (23.66 g/L), indicating the suitability of the model employed and the success of response surface methodology in optimizing the conditions of ethanol production from food waste leachate. Canonical analysis indicated that the stationary point was a saddle point for the ethanol yield. Despite being a waste, an ethanol yield of 0.32 g ethanol/g reducing sugar demonstrated the potential of food waste leachate as a promising biomass resource for the production of ethanol.
KeywordsFermentation pH Reducing sugar concentration Response surface methodology Saccharomyces cerevisiae Temperature
Unable to display preview. Download preview PDF.
- APHA, (1998). Standard Methods for Examination of Water and Wastewater, 20th Ed., American Public Health Association, Washington, D.C.Google Scholar
- Douglas, C. M., (2001). Design and analysis of experiments. 5th. Ed. John Wiley and Sons, Arizona, USA.Google Scholar
- Le Man, H.; Kim, J. W.; Park, H. S., (2008). Optimization of ethanol production from Korean food waste leachate using response surface methodology. In Korea Society of Waste Management conference, Sunchon University, Sunchon, Republic of Korea 8–10 May.Google Scholar
- Rene, E. R.; Jo, M. S.; Kim, S. H.; Park, H. S., (2007). Statistical analysis of main and interaction effects during the removal of BTEX mixtures in batch conditions, using wastewater treatment plant sludge microbes. Int. J. Environ. Sci. Tech., 4 (2), 177–182 (6 pages).Google Scholar
- Rivera, E. C.; Costa, A. C.; Atala, D. I. P.; Maugeri, F.; Maciel, M. R. W.; Filho, R. M., (2006). Evaluation of optimization techniques for parameter estimation: Application to ethanol fermentation considering the effect of temperature. Proc Biochem., 41 (7), 1682–1687 (6 pages).CrossRefGoogle Scholar