Abstract
Wood wastes are potential material for second generation ethanol production within the concept of residual forest bio-refinery. Current paper reports on ethanol production employing an HPLC method for monitoring the chemical content dispersed in the hydrolysate liquor after fermented. The proton-exchange technique was the analytical method employed. Twelve types of wood chips were used as biomass, including Hymenolobium petraeum , Tabebuia cassinoides , Myroxylon peruiferum , Nectandra lanceolata , Ocotea catharinensis , Cedrelinga catenaeformis , Cedrela fissilis Vell , Ocotea porosa , Laurus nobilis , Balfourodendron riedelianum , Pinus Elliotti and Brosimum spp . The influence of diluted sulfuric hydrolysis on the yeast Saccharomyces cerevisiae during the fermentation assay was also investigated. Standard compounds mapped in the analysis comprised fructose, lactic acid, acetic acid, glycerol, glucose and ethanol. The yeast showed ethanol productivity between 0.75 and 1.91 g L -1 h -1 , respectively, without the addition of supplementary nutrients or detoxification. The use of these materials for the bioconversion of cellulose into ethanol has been proved. Current analysis contributes towards the production of biofuels by wastes recovery and by process monitoring and optimization.
Highlights
Concerns on the depletion of fossil fuel resources and climate changes attributed to CO2 emissions give rise to strong global interest in renewable and carbonneutral energy sources, as well as the production of chemical feedstock from vegetal sources (DOHERTY et al, 2011; ZHU; PAN, 2010)
The production of second generation ethanol from biomass is one method to reduce the consumption of crude oil and environmental pollution (BALAT et al, 2008, BALAT, 2011)
Tests were performed in the Laboratory of the Department of Industrial Technology, Universidade Estadual de Santa Catarina (Udesc), and in the Laboratory of the Department of Chemistry, Universidade Regional de Joinville (Univille)
Summary
Concerns on the depletion of fossil fuel resources and climate changes attributed to CO2 emissions give rise to strong global interest in renewable and carbonneutral energy sources, as well as the production of chemical feedstock from vegetal sources (DOHERTY et al, 2011; ZHU; PAN, 2010). One of the more important renewable energy sources, offers many advantages over petroleum-based fuels. Technology environment, economy and consumers are greatly benefitted when employing several types of biofuels. They are biodegradable and contribute towards the planet’s sustainability (DEMIRBAS et al, 2008, 2009, 2011). The production of second generation ethanol from biomass is one method to reduce the consumption of crude oil and environmental pollution (BALAT et al, 2008, BALAT, 2011).
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