Tuesday, April 20, 2010
8-48

Production of biobutanol from hydrolysate of red algae (Gelidium amansii) treated with acid saccharification

Tae Su Jeong1, Won Il Choi1, Jieun Lee2, and Kyeong Keun Oh1. (1) Applied Chemical Engineering, Dankook University, San-29, Anseo-dong, Cheonan, Choongnam, Korea, Cheonan, South Korea, (2) Chemical Engineering, Sungkyunkwan, 300 Cheoncheon-Dong, Jangan-Gu, Suwon, South Korea

Interest in marine biomass as substrates for biofuel production has been increased rapidly due to the limitation of use of land biomass. Macroalgae categorized into green, brown and red algae is found to be alternative biomass for biofuel production due to a variety of benefits over land biomass such as non-food, availability, CO2 reduction and cultivation conditions. Moreover, very low or no lignin in macroalgae is one of the superior properties because it facilitate depolymerization for fermentable sugars and reduces a production of fermentation inhibitors, which has been problematic in lignocellulosic biomass. Considerable efforts have been made to produce fermentable alcohols as a gasoline alternative using various feedstocks. Butanol is known as a next alternative fuel over ethanol with very similar properties to gasoline. Thus, in this study, we investigate the production of butanol using hydrolsates of red algae, Gelidium amansii rich in galctan and glucan. In order to prepare hydrolysates, acid saccharification was carried out with optimized severity index approaches: reaction temperature of 185.3°C, reaction time of 30 min, and acid concentration of 2.0%. Several different  clostrididium spp. were test in the butanol production using prepared hydrolysates of Gelidium amansii after LC-analysis of carbohydrate compositions. The material balance of the fermentation was calculated based on the results in order to assess the overall effectiveness of the butanol production from hydrolysates of Gelidium amansii.

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