Aktivitas Zymomonas mobilis pada produk etanol dari buah semu jambu mete (Anacardium occidentale) dengan variasi sumber nitrogen

Abstract

Mustofa A, Suranto. 2010. Activity of Zymomonas mobilis on ethanol production made of cashew nut apple (Anacardium occidentale) with different sources of nitrogen. Bioteknologi 7: 1-9. This research is aimed at identifying Zymomonas mobilis in producing ethanol through batch fermentation process (in 24, 48 and 72 hours) using cashewnut apple extract (red, green and yellow variety) and urea, ammonium sulphate, extract of green peanut sprout and extract koro (Mucuna pruriens) as sources of nitrogen. The research showed that green cashewnut extract with ammonium sulphate in 24 hours of fermentation produced ethanol in optimum result. This treatment had pH of 5.87, 7.64 g/100 mL of sugar (with 48.44% of consumption), 8.0x107 amount of bacterium (μ = 0.154) and production of ethanol equal to 33.02 g/L (Ye = 90.19%).