USING OF LACCASE IN PAPERMAKING PROCESS FROM OLD CORRUGATED CONTAINER (OCC) PULP

Nina Elyani (Corresponding author), Sonny Kurnia Wirawan, Nena Andrina Restu Center for Pulp and Paper Jl. Raya Dayeuh Kolot 132 Bandung, West Java, Indonesia Tel: +62-22-5202980 E-mail: ninaelyani@yahoo.com, sonny-k@kemenperin.go.id Abstract Old Corrugated Container (OCC) is one of the most potential raw material for paper and paperboard manufacture but it has some disadvantage of a continued decrease in the quality of the fiber during the recycling process. It’s caused by decreasing of carboxyl groups when the fibers undergo drying, resulting in decreased ability for swelling, thereby reducing the ability of the bond between the fiber and the fiber strength. Modification of waste paper using laccase enzyme may increase the fiber content of the carboxyl group of waste paper, therefore will increase paper strength. Experiments carried out with the addition of laccase in various dosage paper stock originating from OCC by 5% pulp consistency. 80 g/m Laboratory sheets, was made from stock, then analyzed by tensile index, burst index, wet tensile index, the content of carboxyl groups and SEM analysis. The experimental results showed addition of 50 U/g laccase at OCC giving optimum value for physical properties.