Biobleaching of Kraft pulp using fungal xylanases produced from sugarcane straw and the subsequent decrease of chlorine consumption. (February 2019)

• Record Type: Journal Article
• Authors: Campioni, Tania Sila; de Jesus Moreira, Leandro; Moretto, Evandro; Sawada Nunes, Natalie Stephanie; de Oliva Neto, Pedro
• Is Part Of: Biomass and bioenergy. Volume 121(2019)
• Page Start: 22
• Page End: 27
• Publication Date: 2019-02
• Subjects: Biobleaching -- Fungal xylanase -- Kraft pulp -- SEM; Biomass energy -- Periodicals; Biomass -- Periodicals; Energy-Generating Resources -- Periodicals; Bioénergie -- Périodiques; 333.9539
• DOI: 10.1016/j.biombioe.2018.12.014
• Languages: English
• ISSNs: 0961-9534

Abstract

Abstract: Xylanase extract, produced by T. reesei QM9414 in a culture with sugarcane straw (SS) as substrate, was studied in the biobleaching of Kraft pulp associated with chemical bleaching. The biobleaching parameters optimization showed that 30 U/g of xylanases, at pH 5, at 50 °C, during 30 min, are the best conditions to bleach the crude Kraft pulp (3% of consistency). lA decrease of 12.5% of Kappa number, as well as the release of 1 g/lL of sugar, and the presence of chromophores compounds (237 nm) are also observed. After this xylanase biobleaching the final chlorine dioxide consumption decrease in 10%, maintaining the same brightness as in the control on the subsequent chemical process. SEM shows the effect on the pulp surface. These results clearly demonstrated that the T. reesei QM9414 xylanase is an eco-friendly and economical alternative for paper production. Highlights: Xylanase production by T. reesei QM9414 using sugarcane straw residue as carbon source. Kraft pulp biobleaching (30 U/g of T. reesei QM9414 xylanases, in pH 5, at 50 °C, during 30 min) resulted in a decrease of 12.5% of Kappa number. Decrease of chlorine dioxide (ClO2 ) consumption, 10%, in chemical bleaching. Images by SEM prove the effective enzyme action on Kraft pulp surface.