tilizing a Novel Fungal Enzymatic Cocktail as an Eco-Friendly Alternative for Cellulose Pulp Biobleachin

Author(s)

Pinheiro, Vanessa Elisa ^[1] ; Ferreira, Jorge A. ^[2] ; de Almeida Betini, Jorge Henrique ^[3] ; Kamimura, Eliana Setsuko ^[4] ; Teixeira de Moraes Polizeli, Maria de Lourdes ^{[1, 3]}

Affiliation

^[1] Univ Sao Paulo, Ribeirao Preto Med Sch, Bandeirantes Av 3-900, BR-14040900 Ribeirao Preto - Brazil

^[2] Univ Boras, Swedish Ctr Resource Recovery, S-50190 Boras - Sweden

^[3] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Bandeirantes Av 3-900, BR-14040901 Ribeirao Preto, SP - Brazil

^[4] Univ Sao Paulo, Fac Anim Sci & Food Engn, Duque Caxias Av 225, BR-13635900 Pirassununga, SP - Brazil

• Document type: Journal article
• Source: BIORESOURCES; v. 16, n. 4, p. 7508-7528, NOV 2021.
• Web of Science Citations: 1

Abstract

Enzyme cocktails can alter the lignin and hemicellulose content in wood cell walls, improving the bleaching process during pulp production and offsetting the need for toxic chemicals. In this study, brown pulp was biobleached with a mixture of crude fungal extracts rich in xylanase and laccase, respectively produced from Aspergillus tamarii Kita and Trametes versicolor on waste materials. The optimal conditions for biobleaching were a mixture of xylanase and laccase crude extracts (1 to 2 v/v), at a temperature of 36 degrees C and a pH of 5.5. The treated brown cellulose pulp showed a reduction in the Kappa number by 1.83 points, representing an efficiency of 20.3%. In addition, the brightness increased by 4.65 points in comparison to the control. Hence, studies involving the application of the standardized cocktail during the hydrolysis of lignocellulosic residues, e.g., barley residue and sugarcane bagasse, led to the formation of 85 g/L and 25 g/L of reducing sugars, respectively. Moreover, the standardized cocktail caused greater deinking of the recycled paper pulp. (AU)

• FAPESP's process: 14/50884-5 - INCT 2014: National Institute of Science and Technology of Bioethanol
• Grantee: Marcos Silveira Buckeridge
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 15/23200-0 - Production of enzymatic cocktails with potential in pulp biobleaching pulp for papermaking from lignocellulosic waste and secondary fibers
• Grantee: Vanessa Elisa Pinheiro
• Support Opportunities: Scholarships in Brazil - Master