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Conference papers
Using Intelligent Cameras in Pulp Production, 2018 PEERS
Using Intelligent Cameras in Pulp Production, 2018 PEERS
Conference papers
Membrane BioReactorTreatment •Kraft Pulping Wastewater Experience, 2018 PEERS
Membrane BioReactorTreatment •Kraft Pulping Wastewater Experience, 2018 PEERS
Conference papers
THE DENSITY CHANGE OF BIOMASS DURING COMBUSTION, 2018 PEERS
THE DENSITY CHANGE OF BIOMASS DURING COMBUSTION, 2018 PEERS
Conference papers
Oxygen Delignification Performance, Caustic Soda vs. Unoxidized White Liquor • A Mill Study, 2018 PEERS
Oxygen Delignification Performance, Caustic Soda vs. Unoxidized White Liquor • A Mill Study, 2018 PEERS
Conference papers
Using Wood Powder as Fuel in Lime Kilns, 2018 PEERS
Using Wood Powder as Fuel in Lime Kilns, 2018 PEERS
Conference papers
Development and Application of an Object-Oriented Simulation Tool for Kraft Recovery Processes, 2018 PEERS
Development and Application of an Object-Oriented Simulation Tool for Kraft Recovery Processes, 2018 PEERS
Conference papers
Digester Scale Control: Fundamentals and Best Practices for Responding to Process Variations, 2018 PEERS
Digester Scale Control: Fundamentals and Best Practices for Responding to Process Variations, 2018 PEERS
Conference papers
Practical Methods to Manage Fouling in Concentrator, 2018 PEERS
Practical Methods to Manage Fouling in Concentrator, 2018 PEERS
Journal articles
Magazine articles
Air and Water Management: Meeting the Ongoing Challenges, Paper360º September/October
Air and Water Management: Meeting the Ongoing Challenges, Paper360º September/October
Journal articles
Magazine articles
Fundamental molecular characterization and comparison of the O, D0, and E stage effluents from hardwood pulp bleaching, TAPPI Journal 2019
ABSTRACT: The present study characterized effluents from the O, D0, and E stages using nuclear magnetic reso-nance (NMR) and gel permeation chromatography (GPC) techniques to better understand the chemical nature of the dissolved organics formed from the bleaching of a high-yield hardwood kraft pulp. Understanding the structures and molecular weight distribution of these organics is the first step in developing methods to mitigate these contam-inates in the discharged effluents. The results indicated that the molecular weight distribution (MWD) of the dis-solved organics from oxygen delignification effluent is broader than those from D0 and E stage effluents. In addition, the O stage filtrate contained considerable amounts of lignin and xylan fragments, which showed its efficiency in removing such materials. The effluent from the D0 stage contained a lower amount of high molecular weight frag-ments and a higher amount of low molecular weight fragments versus the O-stage filtrate. Aromatic structures were nearly absent in the D0 stage filtrate, but the degraded organic material, presumably from oxidized lignin, contained olefinic (C=C) and carbonyl (C=O) functional groups. Furthermore, higher molecular weight fragments were detected in the E-stage effluent, presumably due to the extensive solubilization and removal of the oxidized lignin generated from the D0 pulp.