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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
Lowering the Cost of Opacity and whiteness in surface Coatings, Paper360º September/October 2014

Lowering the Cost of Opacity and whiteness in surface Coatings, Paper360º September/October 2014

Journal articles
Consolidation Watch: Asia-Pacific Newsprint, Paper360° September/October 2014

Consolidation Watch, Paper360º September/October 2014

Journal articles
Paper360°: IPâ??s Liebetreu, read, and Kiser to speak at ASPI 2014 Fall Customer alignment Meeting SEPTEMBER/OCTOBER 2014

ASPI News, Paper360º September/October 2014

Journal articles
intouch: WHATâ??S NEW ON PAPER360.ORG 14SEPPA45

Whats New on Paper360.org, Paper360º September/October 2014

Journal articles
Open Access
Multistage fiber fractionation of softwood chemical pulp through smooth-hole screen cylinders and its effects on paper properties 15APR259

Multistage fiber fractionation of softwood chemical pulp through smooth-hole screen cylinders and its effects on paper properties, TAPPI JOURNAL April 2015

Journal articles
Open Access
A novel method for the determination of linting propensity of paper, TAPPI JOURNAL October 2012

A novel method for the determination of linting propensity of paper, TAPPI JOURNAL October 2012

Journal articles
Open Access
Editorial: TJ editorial board members review 2013 PEERS, IBBC and Research Forum on Recycling, TAPPI JOURNAL September 2013

Editorial: TJ editorial board members review 2013 PEERS, IBBC and Research Forum on Recycling, TAPPI JOURNAL September 2013

Journal articles
Over the Wire, Paper360° September/October 2013

Over the Wire...News Summary, Paper360º September/October 2013

Journal articles
Evolution of Papermaking Technology and Performances EvaluationsSetpPoint: Innovation and Risk, Paper360º September/October 2013

Evolution of Papermaking Technology and Performances EvaluationsSetpPoint: Innovation and Risk, Paper360º September/October 2013

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