PRODUCTIVE DIVERSIFICATION FROM SUGARCANE LIGNOCELLULOSIC BYPRODUCTS

By N. AGUILAR R., A. CASTILLO M., A. HERRERA S.,
D. A. RODRÍGUEZ L. and J.MURGUIA G.

Facultad de Ciencias Biológicas y Agropecuarias, Universidad Veracruzana, Córdoba Veracruz México Tel.: (52) 271 71 6 73 92  naguilar@uv.mx

KEYWORDS: Sugarcane Biomass, Diversification, Mushroom, Pulp And Paper, Fermentable Sugar.

Abstract

THE ACTUAL PROCESS of sugar and ethanol production in Mexico only uses the carbohydrates in the sugarcane juice and molasses. The remaining material, trash, bagasse and pith, constitutes the lignicellulosic byproducts (biomass) of this industry. In this work, three production alternatives were investigated: edible mushroom Pleurotus ostreatus, pulp and paper and fermentable sugar productions from sugarcane biomass. The characterisation of byproducts was carried out according to AOAC test. For the case of mushroom production, sugarcane trash and a 50:50 mixture of trash and bagasse showed the highest yields (biological efficiencies) of 106% and 103% respectively. For acid hydrolysis, trash samples generated in the local industry were used. Several tests were performed to obtain the maximum production of fermentable sugars using diluted H2SO4at concentration level of 1.0%, temperatures (80–160°C) and hydrolysis times (0 to 330 minutes). A pseudo first-order kinetic model was developed to explain the hydrolysis from sugarcane
trash using sulfuric acid. In the last alternative, bagasse pulping and ECF Bleaching (elementary chlorine free) were analysed in detail using TAPPI standards to establish the optimum pulping conditions for this lignocellulosic material.

Source
http://www.issct.org/pdf/proceedings/2010/2010%20Aguilar%20R,%20PRODUCTIVE%20DIVERSIFICATION%20FROM%20SUGARCANE%20LIGNOCELLULOSIC%20BYPRODUCTS.pdf

BUTANOL PRODUCTION FROM SUGARCANE JUICES

By M. KIM and D.F. DAY

Audubon Sugar Institute, LSU Agricultural Center, La. USA
dday@agcenter.lsu.edu

KEYWORDS: Butanol, Fermentation, Sugar Juices, Biomass.

Abstract

BUTANOLis an aliphatic saturated alcoholwith the molecular formula of C4H9OH, which can be used as a transportation fuel, an intermediate and a solvent for a wide variety of chemical applications. The acetone-butanol fermentation was the standard for industrial production of solvents until the 1950s. Modern microbiological techniques have improved the original organism such that it produces high levelsof butanol rather than mixed solvents. Butanol has many advantages as an alternative fuel source; 1) a higher energy content, 2) usable in existing pipelines, 3) easy to blend with gasoline. Butanol can be produced fromsugarcane juice, molasses or sugars from bagasse hydrolysates using a strain of Clostridium beijerinckii.Sugarcane juice and molasses
ferment directly to butanol. The yield ofbutanol was 0.30 g/g sugar from molasses and 0.34 g/g sugar from juice whereas equivalent sucrose concentrations produced 0.27g butanol per g sugar. Details of the economics for a viable production of butanol from sugarcane products are presented.


Source
http://www.issct.org/pdf/proceedings/2010/2010%20Kim,%20BUTANOL%20PRODUCTION%20FROM%20SUGARCANE%20JUICES.pdf