UPGRADATION OF MIX OFFICE WASTE WITH SINGLE AND MULTI COMPONENT ENZYMES
The use of recovered papers for paper making particularly the office papers with toner inks causes quality deterioration of the end product because of bigger visible specks formed, as it is difficult to remove toner inks by conventional deinking process. In the recent years, enzymes in single and in combinations have been tried by various researchers to enhance the toner ink removal during repulping of office waste, however, no systematic research on enzymatic deinking of MOW in Indian context has been reported. The present study has been focused on the removal of toner inks from mix office waste using enzyme combinations to upgrade the quality of MOW for its higher end use. The Central Pulp & Paper Research Institute is an apex organization dedicated to applied research in the area of pulp & paper in India and South East asian region. The Institute is engaged in promotion of cleaner production technologies for Pulp & Paper Industry. Enzymatic deinking is one of the thrust area where focus has been laid upon on evaluation of various enzymes available and being developed indigenously, on pulps and optimization of process conditions for enzymatic deinking, so that suitable enzymes are made available to the industry which could be effectively utilized under existing mills conditions for quality upgradation of office waste. The objective of the present work is to explore the effect of commercial enzymes both single and in combinations in the deinking of mix office waste. Results showed that single commercial enzymes improved the ink removal efficiency however brightness gain was not observed. Enzymes in dual combinations with two and three components have improved the brightness by 3%～6% ISO units as well as ink and dirt removal efficiencies in the range of 80%～95%. Stickies assayed with PULMAC MASTER SCREEn after enzymatic deinking revealed 50%～70% removal which indicated that enzymes could be an attractive alternative for stickies removal/control as well. Enzyme combinations also improved drainability, mechanical strength properties of the paper in addition to improved environmental impact. The study also addresses the efficiency of enzymatic deinking in upgrading mixed office waste paper in comparison with conventional deinking at a relatively lower cost. Laboratory studies conducted with enzymatic and conventional deinking of MOW have show significant benefits in quality and also 30%～40% reduction in operational cost with enzymatic route. The present paper highlights the findings of enzymatic deinking using enzyme combinations and the techno-economic benefits of the enzymatic deinking process for quality upgradation of MOW at relatively lower cost.
MOW deinking stickies
Rita Tandon Vasanta V. Thakur R. M. Mathur A. G. Kulkarni
Central Pulp & Paper Research Institute, P.O.box.174, Saharanpur-247 001, U.P, India
国际会议
广州
英文
160-165
2006-11-08（万方平台首次上网日期，不代表论文的发表时间）