TAPPI Visual Inspection Charts
My TAPPI Story: McKenna Goulette
Sycamore chips were pretreated using a cellulase/hemicellulase mixture prior to conventional kraft pulping. Treatment conditions were 24 h at 50°C, pH 5, and a cellulase/hemicellulase solution at 5 filter paper units (mmols of reducing sugar per milliliter)/g oven dry wood. After enzyme pretreatment followed by kraft pulping, the kappa number of the control was as much as 10% higher than the treated chips. In addition, enzyme treated pulps required less ClO2 per ton pulp (» 20 lbs ClO2) than the control. Pulp strength properties for the pretreated chips were comparable to kraft pulps receiving no enzyme pretreatments. Pulp viscosity was lower in pulps treated with cellulase/hemicellulase alone.
Experience the Power of Publications in 2026
Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.
The best-selling text to introduce the entire technology of pulp and paper manufacture.
A project of the Yankee Dryer Safety & Reliability Committee.
TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries.
Available for Purchase – Conference Proceedings
TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.
Effect of Enzyme Pretreatments on Conventional Kraft Pulping, 1997 Pulping Conference Proceedings