Abstract:
This research aimed to study flotation deinking of laser-printed paper by using cellulase and hemicellulase enzyme along with nonionic surfactant (Tween-80) and anionic surfactant (Sodium dodecyl sulphate, SDS). The experimental factors were enzymes and surfactant dosages in the range of 0-0.15%, 1.75% (based on oven-dried pulp) of Tween 80 and 0.02-0.10% (based on oven-dried pulp) of SDS, respectively. The results showed that optimum condition for single enzyme usage is 0.10% enzyme with 1.75% of Tween 80 and 0.10% of SDS. When using cellulase along with hemicellulase, the optimal condition is 0.10% cellulase and hemicellulase enzyme with 1.75% of Tween 80 and 0.10% of SDS