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Considerations in managing wastewater odor at pulp and paper operations, TAPPI Journal March 2022
ABSTRACT: Many pulp and paper mills are, at least periodically, faced with the release of odors that can migrate offsite and be considered a nuisance by nearby residents. At chemical pulp mills, perceptible odors associated with reduced sulfur compounds (RSCs) are common, many of which are highly perceptible owing to their low odor thresholds. As releases of RSCs and other odorous substances from production processes are progressively controlled, the proportional contribution from wastewater treatment systems to areal odors can increase. This review paper summarizes important fundamentals of odor generation, source identification, and control. Common odorous substances are identified, and mechanisms for their generation are summarized. Approaches for measuring odorous substances are detailed to enable more effective management, and various odor control strategies are discussed.
Journal articles
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Over the Wire Summary, Paper360º March/April 2022
Over the Wire Summary, Paper360º March/April 2022
Journal articles
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Rise of the Machines, Paper360º March/April 2022
Rise of the Machines, Paper360º March/April 2022
Journal articles
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4evergreen: In Search of Perfection in Packaging Circularity, Paper360º March/April 2022
4evergreen: In Search of Perfection in Packaging Circularity, Paper360º March/April 2022
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Stop Circuit Board Corrosion, Paper360º March/April 2022
Stop Circuit Board Corrosion, Paper360º March/April 2022
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It Turned into Nothing, Paper360º March/April 2022
It Turned into Nothing, Paper360º March/April 2022
Journal articles
Magazine articles
Understanding Tree Growth, Harvests, and Carbon Sequestration, Paper360º March/April 2022
Understanding Tree Growth, Harvests, and Carbon Sequestration, Paper360º March/April 2022
Journal articles
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Introducing TAPPI’s Newest Directors, Paper360º March/April 2022
Introducing TAPPI’s Newest Directors, Paper360º March/April 2022
Journal articles
Magazine articles
Development of paper quality parameter measurement in China, TAPPI Journal May 2022
ABSTRACT: Paper quality parameters are important indicators of paper production, such as paper moisture, basis weight, ash content, strength, and so on. This study focuses on the online measurement methods and development of paper basis weight, moisture, and ash measuring. First, the measurable paper parameters and quality control system products in China are analyzed. Then, the basis weight measurement methods, accuracy, and development are given in the range of 10~1000 g/m2. Third, the distinction between infrared and microwave methods for moisture measurement is discussed. Finally, the ash measurement is introduced. Production and consumption of tissue paper in China have continually increased during the past decade. Near-infrared light technology is mature for the measurement of paper parameters in the range of 10~200 g/m2 basis weight. However, the near-infrared online measurement of tissue paper is not widely used, and few tissue paper lines are equipped with this type of quality control system in China. Therefore, technology for near-infrared measurement of basis weight has a great potential market in the field of tissue paper production. This article analyzes the future development trend of near-infrared light in tissue paper basis weight measurement and summarizes the difficulties in near-infrared light measurement of tissue paper basis weight.
Journal articles
Magazine articles
The Effect of Component Removal Upon the Porous Structure of the Cell Wall of Wood. II. Swelling in Water and the Fiber Saturation Point, TAPPI Journal May 2022
ABSTRACT: The word "swelling" applied to an assemblage of fibers such as wood or wood pul p is very vague.