Distinctive delignification with consecutive application of Geobacillus sp. 71 xylanase and Rhodococcus jostii rha1 lignin peroxidase

Aysegul Ozer,Onur Tolga Okan,Sabriye Canakci,Gozde Gocmen,Ali Osman Belduz,Huseyin Kirci,Ilhan Deniz

doi:10.4067/s0718-221x2018005032001

Aysegul Ozer, Onur Tolga Okan + Show 5 more

Open Access

https://doi.org/10.4067/s0718-221x2018005032001

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Journal: Maderas-Cienc Tecnol	Publication Date: Jan 1, 2018
Citations: 1	License type: cc-by

Affiliation: Karadeniz Technical University

Abstract

In present study, single and consecutive applications of xylanase and lignin peroxidase were performed in an XOQP TCF sequence to bleach pine and eucalypts kraft pulp. The consecutive use of Geobacillus sp. strain 71 xylanase and Rhodococcus jostii RHA1 lignin peroxidase was more effective than the single uses. XyzGeo71 treatment (X) indicates a 9.76% and 28.52% reduction in kappa number for pine and eucalypts kraft pulps, respectively. LiPRHA1 treatment (X) showed a 7.88% and 20.9% reduction a in kappa number for pine and eucalypts kraft pulps, respectively. The consecutive treatment of XyzGeo71 and LiPRHA1 (X), however, indicated a 13.67% and 37.2% reduction in kappa number for pine and eucalypts kraft pulps, respectively. The results showed that delignification with the consecutive xylanase and lignin peroxidase treatment was very significant.

Highlights

Pulp bleaching plants are the most contaminating section in pulp and paper industries which have recently experienced enormous transformations to alleviate their environmentally adverse impacts (Okan et al 2015, Ferre et al 2011)
The potential use of LiPRHA1 and XyzGeo71 enzymes in pulp and paper industry were evaluated upon bleaching pine and eucalypts kraft pulps
The most efficient biobleaching of pine kraft pulp with LiPRHA1 on the other hand was obtained under the conditions; 90 min incubation at 40°C, pH 4,0; use of 6 U/g lignin peroxidase at 5% consistency and in the presence of 0,5 mM H2O2 and 4 mM veratryl alcohol specified in Table 1 and Table 2

Summary

Introduction

Pulp bleaching plants are the most contaminating section in pulp and paper industries which have recently experienced enormous transformations to alleviate their environmentally adverse impacts (Okan et al 2015, Ferre et al 2011). With these endeavors, new technologies have been developed, presented, and examined in bleaching and delignification steps. The enzymes for biobleaching are mostly achieved from multifarious microorganisms such as fungi, actinomycetes, and bacteria Owing to their vigorous lignin degrading potential with rich enzymatic efflux, the white rot fungi have recently attracted extensive interest.

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