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Magazine articles
The sticky behavior of pulp and paper mill biosludge during drying, TAPPI Journal June 2019
ABSTRACT: Pulp and paper mill biosludge becomes sticky after being dried to a certain solids content. As bio-sludge becomes sticky, it agglomerates and adheres to the heat transfer surfaces of the dryer. This undesirable property can lower the dryer efficiency and cause the drying equipment to fail.A systematic study was conducted to examine the sticky behavior of biosludge. The stickiness was evaluated by measuring the adhesive force between a sludge cake and a stainless steel substrate, and the cohesive force between a sludge cake and a sludge substrate. The results show that: i) both adhesive and cohesive forces increase markedly as the solids content increases, reaching a maximum value at about 13% solids, and then decrease steadily at a high-er solids content; ii) cohesive force is stronger than adhesive force, implying that biosludge tends to agglomerate rather than adhere to smooth equipment surfaces; and iii) mixing wood fines or fly ash from a biomass boiler reduc-es the stickiness of the mixture. These findings may help mills improve the thermal efficiency of biosludge dryers and to turn biosludge into a more attractive fuel for burning in biomass boilers.
Journal articles
Magazine articles
Fabrication of cross-linked starch-based nanofibrous mat with optimized diameter, TAPPI JOURNAL June 2019
ABSTRACT: The design and synthesis of natural and synthetic polymer blends have received recent and wide attention. These new biomaterials exhibit progress in properties required in the field of medicine and healthcare. Herein, the aim of present study is to fabricate starch (ST)/polyacrylic acid (PAA) electrospun nanofibrous mat with a smooth and uniform morphology, lowest fiber diameter (below 100 nm) and the highest possible starch content. Starch itself is poor in process-ability, and its electrospinning could be quite a challenging process. To address this, we carried out the response surface methodology (RSM) technique for modelling the electrospinning process. In order to have ST/PAA nanofibers with the finest possible diameter, optimized processing parameters (applied volt-age, nozzle-collector distance and feed rate) obtained from RSM technique were applied. ST/PAA electrospun nano-fibers with an average diameter of 74±13 nm were successfully achieved via the electrospinning method for the first time. The structure, preparation and properties of the nanofibrous structure were discussed. Results indicated that drug loaded ST/PAA blend nanofibrous structure has a great potential to be used in controlled drug release systems.
Journal articles
Magazine articles
Large data set analysis to determine refiner plate total cost of ownership, TAPPI Journal June 2019
ABSTRACT: Efficient process data storage and its subsequent analysis are vital to the profitable operation of a paper mill. An evaluation of refiner plate performance was conducted for an integrated paper mill. Trials with two new plate patterns were compared with the incumbent pattern; the goal was to increase refiner plate life. Plate life increased with both new design patterns, and the mill selected one of the two new choices. However, addi-tional impacts to paper machine performance and mill maintenance costs were not considered in the selection deci-sion. A large data set analysis tool was used to identify unrealized savings of 1.5% with reduced fiber usage (basis weight) on the paper machine’s most prevalent grade. The large data analysis indicated that this unrealized benefit with the alternate plate design was not attainable with the chosen plate design.
Journal articles
Full Characterization of Stickies in a Newsprint Mill: The Need for a Complementary Approach TAPPI JOURNAL, January 2007
Full Characterization of Stickies in a Newsprint Mill: The Need for a Complementary Approach TAPPI JOURNAL, January 2007
Journal articles
Substitution of Hardwood Bleached Kraft Pulp with Aspen High-Yield Pulp in LWC Wood-Free Papers, Part 2: Impact on Coated Paper Quality, TAPPI JOURNAL, January 2007
Substitution of Hardwood Bleached Kraft Pulp with Aspen High-Yield Pulp in LWC Wood-Free Papers, Part 2: Impact on Coated Paper Quality, TAPPI JOURNAL, January 2007
Journal articles
Hard-to-remove water in cellulose fibers characterized by thermal analysis: A model for the drying of wood-based fibers, TAPPI JOURNAL, July 2007
Hard-to-remove water in cellulose fibers characterized by thermal analysis: A model for the drying of wood-based fibers, TAPPI JOURNAL, July 2007
Journal articles
Life-cycle thinking in the pulp and paper industry, Part I: Current practices and most promising avenues, TAPPI JOURNAL, July 2007
Life-cycle thinking in the pulp and paper industry, Part I: Current practices and most promising avenues, TAPPI JOURNAL, July 2007
Journal articles
Biogenic H2SO4 Corrosion of Concrete in Oxygen Activated Sludge Bioreactors, TAPPI JOURNAL, June 2007
Biogenic H2SO4 Corrosion of Concrete in Oxygen Activated Sludge Bioreactors, TAPPI JOURNAL, June 2007
Journal articles
Treatment of Bleaching Effluent From the Pulp and Paper Industry by Photcatalytic Oxidation, TAPPI JOURNAL, June 2007
Treatment of Bleaching Effluent From the Pulp and Paper Industry by Photcatalytic Oxidation, TAPPI JOURNAL, June 2007
Journal articles
Stress and Strain for Perforated Tensile Specimens, Part 1: Experimental Measurements, TAPPI JOURNAL, March 2007
Stress and Strain for Perforated Tensile Specimens, Part 1: Experimental Measurements, TAPPI JOURNAL, March 2007