Turgut Halil SAHİN

Caustic soda and bio-soda pulping of jute

In this study, new approaches for pulping jute have been evaluated using caustic soda and bio-soda pulping approaches. Although caustic soda pulps had good yield and strength properties, the delignification ability of the system was limited. Requiring higher temperatures and cooking times to achieve desired residual lignin around 5%. This resulted in yield and strength losses of the pulp. A comparison of pulps from bio-tretaed and untretaed samples of jute bast at 300ml CSF clearly demonstrates the advantage of bio-treatment over untretaed samples. Ceriporiopsis subvermispora treatment prior to soda pulping synergistically affects on lignin removal. These preliminary results imply that white-rot fungi treatment was effective in pulp strength and lower residual lignin. This improvement is very important because the residual lignin in pulps had reducing effects on quality of paper products. In bio-soda pulps, the highest burst strength of 4.2 kPa.m2/g and tensile strength of 62.7 N.m/g were found at 200 °C and 45 min reaction conditions.

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