01645nam a2200229Ia 4500 IA_Ethanol production from pineapple waste juice batch fermentation (Ananas comosus L.) by the bacteria Zymomonas mobilis with and without controlling pH, and by the yeast Saccharomyces cerevisiae without controlling pH was studied. Respose variables were ethanol (%), total sugars (%), titratable acidity (%) and pH. A randomized complete design was used. Highest ethanol production was obtained by Z. mobilis without controlling pH (6.3 %), comparing with Z. mobilis with controlling pH (4.92%) and with S. cerevisiae without controlling pH (5.41%). Optimum conditions to produce ethanol with Z. mobilis were: temperature 30ºC, approximately 11% total sugars, about 0.3% titratable acidity and pH of about 5.5. The optimum conditions to produce ethanol from S. cerevisiae were: temperature 30ºC, about 10% total sugar, approximately 1% titratable acidity and pH of about 3.4. ETANOL A PARTIR DE LA FERMENTACION DE JUGO DE DES 220117s xx 000 0 und d 184036 Disponible en PDF Desechos Fermentación 156281 Ethanol production 156282 Pineapples Wastes 156283 Piñas Desechos 156284 Producción de etanol 156285 Wastes Fermentation 156286 Esparza Torres, Félix, asesor 163648 Gómez Cruz, Adalberto, dir. 148224 Goytia Jiménez, María Antonieta, asesor 145712 TESIS R53 2009 184036 184036