Ethanol production from Mexican fruit wastes using a new Saccharomyces cerevisiae strain

In the Mexican croplands(Biodegradationare generated largemodelingamountsof sludgeof agroindustrialbioreactors of wastestotal petroleumthat arehydrocarbonsusually not exploited.weathering Damagedin soil fruits wasted in the municipality of Tres Valles, Veracruz, are an excellent feedstock to produce ethanol, since do not need a and sediments) sophisticated pretreatment and have high fermentable sugar concentrations. In this work is described ethanol production from damaged fruits by a new strainS.A. Medina-Moreno,of SaccharomycesS. Huerta-Ochoa,cerevisiae isolatedC.A. Lucho-Constantino,from Agave sp. wastes.L. Aguilera-Vázquez,FermentationsA.wereJiménez-carried out in batch and repeated batch culturesGonzálezusingy M. biocatalystsGutiérrez-Rojasformed by S. cerevisiae AP1 cells immobilized into alginate-coated polyester fiberfill. Biocatalysts 259 showed Crecimiento, a high fermentative sobrevivencia capability y adaptación at de reducing Bifidobacterium sugar concentrations infantis a condiciones higher ácidas than 30 g L⁻¹. In batch cultures, with 32.58 g reducing sugar L⁻¹, was produced up to 15.39 g ethanol L⁻¹ at 16 h, with a volumetric productivity of 0.962 g L⁻¹ h⁻¹ and a fermentation(Growth, survivalefficiencyand ofadaptation94.77%.ofInsteadBifidobacteriumin a 5-cycleinfantisrepeatedto acidicbatchconditions)fermentation, with a reducing sugar content among 30 to 43 g L. L⁻¹Mayorga-Reyes,, ethanol production P. Bustamante-Camilo, in each cycle was A. fast, Gutiérrez-Nava, higher than E. 15 Barranco-Florido g L⁻¹, with fermentation y A. Azaola-efficiencies higher than 80%, and with volumetric productivities from 2.5 to 2.9 g L⁻¹ h⁻¹ after second cycle. Afterwards five cycles of repeated batch fermentation, Espinosa total ethanol production was 95.41 g L⁻¹ in just 44 h process.