Morphological and Mechanical Properties of Old Newspaper Deinked with Cellulase and Laccase Combination

Noni Oktari, Saharman Gea, Andriayani, Sri Rahayu, Reka Mustika Sari, Khatarina Meldawati Pasaribu

2019

Abstract

The utilization of enzyme in deinking process of recycle paper is still in development phase since it was known that conventional deinking use large amount of chemicals such as sodium hydroxide, sodium silicate, and hydrogen peroxide which are environmentally damaging. In the present study, cellulase combined with laccase was used for deinking process of old newspaper pulp. The first step was repulping the old newspaper, and then the pulp slurry at 10% consistensy was treated with cellulase and laccase with different concentration from 0-2%. After washing process, the pulp was reforming in to the handsheet. The tensile strength of the handsheet was tested and the morphological changes was analyzed using scanning electron microscopy (SEM). The result showed that handsheet treated with 1% cellulase and 1% laccase had the highest tensile strength (2.1 MPa) with 1493 MPa Young’s modulus. From the images of SEM, showed that fiber surface pulp turned rough and microfibril also appeared on the fiber surface after enzymatic treatment with cellulase and laccase, which indicated delignification process and facilitated the release of ink particle entrapped.

Paper Citation

in Harvard Style

Oktari N., Gea S., Andriayani., Rahayu S., Mustika Sari R. and Meldawati Pasaribu K. (2019). Morphological and Mechanical Properties of Old Newspaper Deinked with Cellulase and Laccase Combination. In Proceedings of the 1st International MIPAnet Conference on Science and Mathematics - Volume 1: IMC-SciMath, ISBN 978-989-758-556-2, pages 273-278. DOI: 10.5220/0010152100002775

in Bibtex Style

@conference{imc-scimath19,
author={Noni Oktari and Saharman Gea and Andriayani and Sri Rahayu and Reka Mustika Sari and Khatarina Meldawati Pasaribu},
title={Morphological and Mechanical Properties of Old Newspaper Deinked with Cellulase and Laccase Combination},
booktitle={Proceedings of the 1st International MIPAnet Conference on Science and Mathematics - Volume 1: IMC-SciMath,},
year={2019},
pages={273-278},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010152100002775},
isbn={978-989-758-556-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 1st International MIPAnet Conference on Science and Mathematics - Volume 1: IMC-SciMath,
TI - Morphological and Mechanical Properties of Old Newspaper Deinked with Cellulase and Laccase Combination
SN - 978-989-758-556-2
AU - Oktari N.
AU - Gea S.
AU - Andriayani.
AU - Rahayu S.
AU - Mustika Sari R.
AU - Meldawati Pasaribu K.
PY - 2019
SP - 273
EP - 278
DO - 10.5220/0010152100002775