Pulp improvement of oil palm empty fruit bunches associated to solid-state biopulping and biobleaching with xylanase and lignin peroxidase cocktail produced by Aspergillus sp. LPB-5.

Autor: Orozco Colonia BS; Department of Agricultural Sciences and Technology, Federal University of Tocantins, CEP 7740-2970, Gurupi, TO, Brazil; Department of Bioprocess and Biotechnology Engineering, Federal University of Paraná, CEP 81531-970, Curitiba, PR, Brazil., Lorenci Woiciechowski A; Department of Bioprocess and Biotechnology Engineering, Federal University of Paraná, CEP 81531-970, Curitiba, PR, Brazil., Malanski R; Department of Bioprocess and Biotechnology Engineering, Federal University of Paraná, CEP 81531-970, Curitiba, PR, Brazil., Junior Letti LA; Department of Bioprocess and Biotechnology Engineering, Federal University of Paraná, CEP 81531-970, Curitiba, PR, Brazil., Soccol CR; Department of Agricultural Sciences and Technology, Federal University of Tocantins, CEP 7740-2970, Gurupi, TO, Brazil; Department of Bioprocess and Biotechnology Engineering, Federal University of Paraná, CEP 81531-970, Curitiba, PR, Brazil. Electronic address: soccol@ufpr.br.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2019 Aug; Vol. 285, pp. 121361. Date of Electronic Publication: 2019 Apr 18.
DOI: 10.1016/j.biortech.2019.121361
Abstrakt: Oil palm empty fruit bunches is a lignocellulosic feedstock with biotechnological potential and thousands of tons are generated in the world each year. Filamentous fungi producing xylanases and ligninases in biopulping to obtain cellulose is a pulp improvement alternative. The enzymatic cocktail was produced in solid-state biopulping by Aspergillus sp. LPB-5 with 54.32 U/g xylanase, 13.41 U/g lignin peroxidase and low cellulase activity. Biological, thermal and chemical pretreatments were compared and enzymatic biobleaching was applied to pretreated pulps. Biopulping and biobleaching combination had 36.80% lignin loss, 26.27% hemicellulose reduction, 74.36% pulp yield with 36.56% digestibility. Alkaline and biobleaching combination removed 81.97% hemicellulose and 93.89% lignin with 73.59% digestibility. Enzymatic biobleaching increased the pulp digestibility in all pretreatments. Finally, the development of a bio-pretreatment to remove hemicellulose and alter the lignin-carbohydrate complex interface presented a soft process with great eco-friendly potential, where mild pre-treatments would reduce the use of aggressive agents.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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