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Journal articles
Magazine articles
Why Are Foreign Companies Investing in North American Pulp and Paper?, Paper360º September/October 2019

Why Are Foreign Companies Investing in North American Pulp and Paper?, Paper360º September/October 2019

Journal articles
Magazine articles
Open Access
A novel unit operation to remove hydrophobic contaminants, TAPPI Journal April 2020

ABSTRACT: For mills making paper with recovered fiber, removal of hydrophobic contaminants is essential for trouble-free operation of paper machines. Significant cost savings on paper machine operation can be achieved by reducing deposits, which results in better quality, reduced downtime, increased fiber yield, and reduced energy consumption. Bubble nucleation separation (BNS) is a relatively new process for removing hydrophobic particles. When vacuum is applied to a slurry, dissolved gas bubbles nucleate on hydrophobic particles and drag them to the surface for easy removal. We constructed a 16-L batch unit to evaluate the effect of operating parameters on removal of hydrophobic particles, using statistical design of experiments. These results were used to guide our design of a 16-L continuous unit. We tested this unit on laboratory and mill samples. The removal of 60%•80% of hydrophobic particles was achieved with a low reject rate of < 2%.Following on this success, we built a 200-L pilot unit and tested it in our pilot plant. With promising results there, we installed the pilot unit at a commercial paper recycling mill. Over the course of several mill trials, we showed that it was possible to remove a considerable amount of suspended solids from paper machine white water with less than 2% rejects. Unfortunately, due to the unit only treating 50 L/min and the mill flow being 12000 L/min, we were not able treat a sufficient portion of the white water to know whether a large-scale implementation of BNS would improve paper machine runnability.

Journal articles
Magazine articles
Open Access
Editorial: The changing face of the coated paper industry, TAPPI JOURNAL January 2018

Editorial: The changing face of the coated paper industry, TAPPI JOURNAL January 2018

Journal articles
Magazine articles
Open Access
Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018

Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018

Journal articles
Magazine articles
Open Access
Print quality of flexographic printed paperboard related to coating composition and structure, TAPPI Journal January 2018

Print quality of flexographic printed paperboard related to coating composition and structure, TAPPI Journal January 2018

Journal articles
Magazine articles
Pulp in a Frenzy, Paper360º, January/February 2018

Pulp in a Frenzy, Paper360º, January/February 2018

Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360º, January/February 2018

TAPPI Journal Summaries, Paper360º, January/February 2018

Journal articles
Magazine articles
A New Resource for R&M Professionals, Paper360º, January/Feb

A New Resource for R&M Professionals, Paper360º, January/February 2018

Journal articles
Magazine articles
The Operations and Maintenance Partnership, Paper360º, Janu

The Operations and Maintenance Partnership, Paper360º, January/February 2018

Journal articles
Magazine articles
RISI's Top 50 Power List, Paper360º July/August 2018

RISI's Top 50 Power List, Paper360º July/August 2018

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