Rheology of acid suspensions containing cassava bagasse: Effect of biomass loading, acid content and temperature

Author(s)

Carregari Polachini, Tiago ^{[1, 2]} ; Mulet, Antonio ^[2] ; Carcel, Juan A. ^[2] ; Telis-Romero, Javier ^[1]

Affiliation

^[1] Sao Paulo State Univ Unesp, Food Engn & Technol Dept, Inst Biosci Human & Exact Sci Ibilce, Campus Sao Jose Rio Preto, BR-15054000 Sao Paulo - Brazil

^[2] Univ Politecn Valencia, Dept Tecnol Alimentos, Grp Anal Simulac Proc Agroalimentarios ASPA, Valencia 46071 - Spain

• Document type: Journal article
• Source: Powder Technology; v. 354, p. 271-280, SEP 2019.
• Web of Science Citations: 0

Abstract

Understanding the characterization and rheological behavior of acid suspensions of cassava bagasse provides essential information for the design of conversion processes. Samples with different cassava bagasse concentrations (0-10% w.w-1), phosphoric acid (0-10% w.w(-1)) at temperatures between 278.13 and 318.13 K were submitted to steady-state flow over a wide range of shear rates (1-265 s(-1)). The biomass particles had considerable residual starch (similar to 50% db), low lignin content and adequate particle size (<200 mu m) for the conversion process. Flow curves were well-fitted to the Herschel-Bulkley model, presenting a Newtonian domain at low solids and acid content and a non-Newtonian behavior with noticeable yield stress and shear-thinning characteristic (n < 1) at above 6% of cassava bagasse. Resistance to flow increased as the solids loading and acid content increased. Temperature dependence could be expressed as a function of an Arrhenius-type equation with good accuracy of fit. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 17/06518-2 - Hydrolysis of cassava bagasse assisted by high-intensity ultrasound: acidic saccharification of residual starch with posterior enzymatic treatment of lignocellulosic biomass
• Grantee: Javier Telis Romero
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants