Utilization of rice straw and used paper for the recycle papermaking

N Suseno,M Sifra,V Elvira,T Adiarto

doi:10.1088/1757-899x/703/1/012044

N Suseno, M Sifra + Show 2 more

Open Access

https://doi.org/10.1088/1757-899x/703/1/012044

Copy DOI

Abstract

Rice Straw is one of the most important materials that has been used for pulp and paper production due to its abundance and cost-effectiveness. However, the pulping and papermaking characteristics of the mixture of rice straw and used paper have rarely been investigated. In this experiment, delignified rice straw was mixed with used paper in order to make recycle papers with acceptable properties. Soda pulping process was carried out to remove out of lignin. The delignification was designed to measure the effects in terms of sodium hydroxide concentration and temperature, on the cellulose and lignin content of rice straw, and its tensile strength and water absorption. The mass ratio of used paper and rice straw was varied and its physical properties was observed and compared to paper from natural rice straw. The delignification was conducted using NaOH concentrations (4-10% w/w) and temperatures (60-90°C) for 1 hour. The ratio of rice straw to used paper was varied (1:1-1:9). An optimum condition was obtained from rice straw delignification at NaOH concentration of 8% and temperature of 90°C. The results of the optimum condition obtained the highest amount of cellulose content and tensile strength while having the lowest amount of lignin content and water absorption.

Highlights

In recent years, the three major problems that would continue to puzzle the development of the paper industry are the shortage of resources, the contamination of the environment and the level of technical equipment
The delignification was designed to measure the effects in terms of sodium hydroxide concentration and temperature on the cellulose and lignin content of rice straw, and its tensile strength and water absorption to establish the optimum operating pulping conditions
This optimum condition was obtained from rice straw delignification at NaOH concentration of 8%, delignification temperature of 90°C

Summary

Introduction

The three major problems that would continue to puzzle the development of the paper industry are the shortage of resources, the contamination of the environment and the level of technical equipment. Rice straw is one of the most important materials that has been used for pulp and paper production due to the high cellulose content. The production of paper is essentially a process of removing the lignin contained in the fibre of raw materials in order to obtain a high cellulose content and low lignin content in pulp or paper [4]. After being cleaned and reformed, used paper could be converted back into pulp In this experiment, in order to obtain recycle papers with desirable properties, rice straw was delignified with different NaOH concentrations at different temperatures during soda pulping prior to mixing with office waste papers. The delignification was designed to measure the effects in terms of sodium hydroxide concentration and temperature on the cellulose and lignin content of rice straw, and its tensile strength and water absorption to establish the optimum operating pulping conditions. The ratio of used paper mixture to rice straw was varied in order to observe the physical properties (tensile strength and water absorption) of recycle paper and compared with delignified natural rice straw paper

Experimental

Findings

Experimental design

Conclusion