Eco-friendly pulping of wheat straw using crude xylano-pectinolytic concoction for manufacturing good quality paper

Environmental Science and Pollution Research International
Libin Mathew VargheseRitu Mahajan

Abstract

In this study, suitability of xylano-pectinolytic enzymes in pulping of wheat straw has been explored. The suitable biopulping conditions were optimized, with xylanase dose of 400 and pectinase dose of 120 IU/g wheat straw, 1:10 (g/ml) material to liquid ratio, 55 °C temperature, 3 h treatment time, 0.75% Tween 80 and pH 8.5. Enzymatic pretreatment efficiently increased the pulpability of wheat straw, generated pulp with higher yield, lower kappa number (15.67%) and rejections (59.65%) in comparison with chemical pulp. The brightness of pretreated wheat straw pulp with enzyme was 16.04% higher than that of the non-enzyme treated wheat straw pulp. The biopulping resulted in 12% reduction of pulping chemicals along with more residual alkali content, in order to achieve similar optical and chemical properties as obtained by 100% chemically treated pulp. Physical properties of pulp also improved after enzymatic pretreatment, increasing burst index (26.50%), tear index (18.22%) and breaking length (5.56%). The enzyme plus chemical (88% pulping chemicals) treated pulp showed improvement in brightness and whiteness, with reduction in yellowness at all bleaching stages. In comparison with chemically bleached pulp, biopulp with reduced ...Continue Reading

References

Apr 18, 2006·Bioresource Technology·Rakhee Khandeparkar, Narayan B Bhosle
Dec 17, 2008·Applied Biochemistry and Biotechnology·Florbela CarvalheiroFrancisco M Gírio
Apr 25, 2012·Applied Biochemistry and Biotechnology·Fantahun WoldesenbetPrince Sharma

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