Effect of hemicelluloses on pulp characteristics and use of ceramic membranes in the separation of hemicelluloses from highly alkaline industrial process stream
- 81 Downloads
Effect of hemicelluloses on pulp swelling and reactivity characteristics was demonstrated. Pulp swelling, reactivity, porosity, absorption capacity were noted to decrease with increase in hemicelluloses of steeping lye. Performance of ultrafiltration ceramic membranes was studied for the separation of hemicelluloses from a highly alkaline stream of viscose process containing 17–18 wt% sodium hydroxide. Effect of process conditions like pressure and feed concentrations (hemicellulose and caustic) was studied to understand their correlation with hemicelluloses retention and permeate flux. Long-term performance of ceramic and polymeric membranes were also compared. This study indicates no adverse impact on retention of hemicelluloses with the use of ceramic membranes, however, significant increase in permeate flux could be obtained. Ceramic membranes were found to sustain the performance owing to their chemical stability.
KeywordsUltrafiltration Ceramic membrane Hemicelluloses Caustic Rayon
One of the authors (Saurabh Singh) duly acknowledges the support from Birla Cellulosic, Grasim Industries Ltd., Kharach, India.
- Aspinall G (1959) Structural chemistry of hemicelluloses. Adv Carbohydr Chem 14:429–468Google Scholar
- Ebrahimi M, Busse N, Kerker S, Schmitz O, Hilpert M, Czermak P (2016) Treatment of the bleaching effluent from sulfite pulp production by ceramic membrane filtration. Membranes 6:Article 7Google Scholar
- Fan PM, Zhen KF, Zan ZY, Chao Z, Jian Z, Yun JZ (2016) Preparation and development of porous ceramicmembrane supports fabricated by extrusion technique. Chem Eng Trans 55:277–282Google Scholar
- Hermans PH (1949) Physics and chemistry of cellulose fibres with particular reference to rayon. Elsevier, New YorkGoogle Scholar
- Humpert D, Ebrahimi M, Czermak P (2016) Membrane technology for the recovery of lignin. Membranes 6:Article 42Google Scholar
- Laine JE, Haukkovaara E, Oravitta P, Peltola P (1987) Experimental evaluation of electron beam irradiation and ultrafiltration in the manufacture of viscose fibres. Lenzinger Berichte 87(62):54–57Google Scholar
- Nyrhila JV (1966) Flow of Hemicellulose in Viscose Process, (Finnish) Diploma, HelsinkiGoogle Scholar
- Tobias P, Ann-Sofi J, Guido Z (2005) Fractionation of hemicellulose by membrane filtration. In: Proceedings of the 14th European biomass conference, 17–21 October 2005, Paris, France, pp 1693–1696Google Scholar
- Woodings C (ed) (2001) Regenerated cellulose fibres. CRC Press, CambridgeGoogle Scholar