Ultrasound-assisted acid hydrolysis of cassava (Manihot esculenta) bagasse: Kinetics, acoustic field and structural effects

Autor(es)

Polachini, Tiago Carregari ^{[1, 2]} ; Hernando, Isabel ^[3] ; Mulet, Antonio ^[2] ; Telis-Romero, Javier ^[1] ; Carcel, Juan A. ^[2]

Afiliação do(s) autor(es)

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

^[2] Univ Politecn Valencia UPV, Dept Tecnol Alimentos, Grp Anal & Simulac Proc Agroalimentarios, Camino Vera S-N, Valencia 46071 - Spain

^[3] Univ Politecn Valencia UPV, Dept Tecnol Alimentos, Grp Invest Microestruct & Quim Alimentos, Camino Vera S-N, Valencia 46071 - Spain

• Tipo de documento: Artigo Científico
• Fonte: ULTRASONICS SONOCHEMISTRY; v. 70, JAN 2021.
• Citações Web of Science: 2

Resumo

Improving the actual acid hydrolysis of cassava bagasse (CB) with the assistance of high-intensity ultrasound (US) was aimed in comparison with mechanical agitation (AG). The kinetics of reducing and total sugar release were mathematically modeled. The acoustic field characterization and apparent viscosity of the suspensions were correlated. Moreover, microscopic analyses (visible, fluorescence and polarized light) were carried out to identify changes produced by the treatments. Both AG and US-treatments showed themselves to be effective at hydrolyzing CB. However, US-experiments reached equilibrium in the reducing sugar release process earlier and obtained slightly higher values of total sugars released. The Naik model fitted the experimental data with good accuracy. A greater loss in the birefringence of the starch granules and the degradation of lignocellulosic matter was also observed in US-assisted hydrolysis. The actual acoustic power applied was reduced after hydrolysis, probably due to the increase in the apparent viscosity of the resulting suspensions. (AU)

• Processo FAPESP: 17/06518-2 - Hidrólise de bagaço de mandioca assistida por ultrassom de alta intensidade: sacarificação ácida do amido residual com posterior tratamento enzimático da biomassa lignocelulósica
• Beneficiário: Javier Telis Romero
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular