This monograph addresses an inevitability in the papermaking process: microbiological effects on process and product. It addresses the types of process inefficiencies which can result from poor microbiological control, and describes modern identification and characterization methods, including specific details of integrated control methods and strategies. Topics include biocorrosion, treatment strategies, modern regulatory-compliant preservatives and slimicides, the impact of additives, closure effects, boilouts, and the impact of microbial contamination on finished goods.

From the Preface: “...The major process change has been the shift from predominantly acid (pH 4-6) to predominantly alkaline (pH 7-9) papermaking, as a result of the increased use of calcium carbonate as a filler. This change produced a more favorable environment for bacterial growth and the subsequent need for improved deposit control programs. Concurrent with the need for more effective slimicides appeared increased environmental awareness and associated new regulations. Another trend that developed was the increase in water reuse within the mill (water closure)...”

Target Audience: Any paper industry professional concerned with wet-end chemistry, product quality, and process efficiency.

Table of Contents:

Microbes in the Paper Machine Environment

Biocorrosion in the Pulp and Paper Industry

Control of Microorganisms in Papermaking Systems

Microbiological Control in Kaolin and Calcium Carbonate Slurry

The Effect of Water Recovery and Reuse on Microbial Activity

Boilouts — Chemical Cleaning Programs

Microbiological Quality Assurance of Wet Wipe Paper Products

Papermaking Microbiology Fundamentals

Appendices

Index