Microbial Impacts on Wet End Chemistry

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As mixed office waste volume has dropped off, tissue producers with integrated deinking plants have been forced to supplement or completely replace the recycled content grades with virgin alternatives. The most common virgin alternative is BEK. This webinar will review best practices for dealing the operational changes expected from this fiber change so that quality and productivity can be maintained.

The presenter will discuss the impact bacterial populations and their by-products have on the efficiency and functionality of wet end chemistry in the paper industry.

We will explore the potential benefit of using Vybrant 903 in a Bleached High Density to give a pulp mill additional bleaching capacity.

With more companies and more assets entering the structured tissue arena, the competition in the premium tissue market is increasing. The continual push for product improvements is steadily shrinking the operating window of the machine and taking PVOH further away from its typical capabilities. The discussion is designed to open up the thought process of better managing PVOH-based coating packages and modifying them to better respond to consumer pressures for product improvement and to help mills to stay ahead of the competition.

Packaging production is a complex process aiming at producing paper sheets from fibers with maximum strength at the lowest cost. After pulping, fibers do not present enough bonding strength. Consequently, a mechanical treatment such as refining, is required to increase fiber bonding and develop strength. Refining of pulps is a key step of papermaking and relies on mechanical treatment of their water suspensions. Refining increases the fibrillation and surface area of cellulose fibers, which enhance fiber flexibility as well as bonding interactions between the fibers. The effect of enzymatic treatment to condition fibers prior to refining is now a proven science; however, it has been used mostly in bleached and recycled fibers. The application of these technologies in unbleached Kraft has been more challenging due interfering substances that come with the fiber and high pH and temperature of the system.

By using a recently developed novel characterization technique that provided a better understanding of what types of cellulose and hemi cellulose are present on the surface of the unbleached Kraft fibers, we have developed a new enzyme-based technology that has proven to be very effective in unbleached Kraft. This presentation will cover the new technique and includes mill case results with this new technology.

We will provide a technical presentation on the mechanics and expected benefits for a mill interested in pursuing pre-bleaching enzymatic technology.

Maurice Rizcallah and Rosy Covarrubias will describe:
•The basics of enzyme technology for fiber development while dispelling some myths
•How productivity can be improved regardless of your fiber type
•Why decoupling your fiber development from your wet end chemistry provides synergies not limitations
•Examples of the ROI Buckman provides with Maximyze® enzymatic technologies.

Mark Christopher, Global Market Development Manager for Tissue, discusses a tissue manufacturer's most costly raw material, pulp, and how pulp expenditures can be reduced without sacrificing tissue softness and strength.

Tom Holm, Global Market Development Manager for Pulp at Buckman, discusses what is in a pitch deposit and five options for controlling pitch in a pulp mill.