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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
Magazine articles
Evaluation of rice straw for purification of lovastatin, TAPPI Journal November 2021
ABSTRACT: Cholesterol synthesis in the human body can be catalyzed by the coenzyme HMG-CoA reductase, and lovastatin, a key enzyme inhibitor, can reduce hypercholesterolemia. Lovastatin can be obtained as a secondary metabolite of Aspergillus terreus ATCC 20542. In this study, rice straw of lignocellulose was used in aeration and agitation bath fermentation in a 1-L flask, and a maximal crude extraction rate of 473 mg/L lovastatin was obtained. The crude extract was treated with silica gel (230–400 mesh) column chromatography. Ethyl acetate/ethanol (95%) was used as the mobile phase, and isolation was performed through elution with various ethyl acetate/ethanol ratios. The highest production rate of 153 mg/L was achieved with ethyl acetate/ethanol in a ratio of 8:2. The lovastatin gained from the crude extract was added to 12 fractions treated with 0.001 N alkali, and acetone was then added. After 24 h of recrystallization at 4°C, the extract underwent high-performance liquid chromatography. The purity had increased from 25% to 84.6%, and the recovery rate was 65.2%.
Economics of Introducing Kenaf Fibers as a Complementary Fiber Source in Existing Wood Pulp Mills, 1998 Pulping Conference Proceedings
Economics of Introducing Kenaf Fibers as a Complementary Fiber Source in Existing Wood Pulp Mills, 1998 Pulping Conference Proceedings
Role of pH and Fe (III) in Delignification with Distilled Peracetic Acid, 1998 Pulping Conference Proceedings
Role of pH and Fe (III) in Delignification with Distilled Peracetic Acid, 1998 Pulping Conference Proceedings
Temperature Management Considerations in Closed Water Loop Deinking Plants, 1998 Recycling Symposium Proceedings
Temperature Management Considerations in Closed Water Loop Deinking Plants, 1998 Recycling Symposium Proceedings
Deinking Difficulties Related to Ink Formulation, Printing Process and Type of Paper, 1999 Recycling Symposium Proceedings
Deinking Difficulties Related to Ink Formulation, Printing Process and Type of Paper, 1999 Recycling Symposium Proceedings
Selection and Performance of Materials for Biomass Gasifiers, 2010 TAPPI/PAPTAC International Chemical Recovery Conference
Selection and Performance of Materials for Biomass Gasifiers, 2010 TAPPI/PAPTAC International Chemical Recovery Conference
Multistage Alkali Peroxide Bleaching in Low Kappa Kenaf Bast Pulp, 2011 International Pulp Bleaching Conference
Multistage Alkali Peroxide Bleaching in Low Kappa Kenaf Bast Pulp, 2011 International Pulp Bleaching Conference
Get It Together!, 2011 International Pulp Bleaching Conference
Get It Together!, 2011 International Pulp Bleaching Conference
Novel ECF Bleaching Sequence Using Peracetic Acid â?¢New Possibilities and Gains, 2011 International Pulp Bleaching Conference
Novel ECF Bleaching Sequence Using Peracetic Acid •New Possibilities and Gains, 2011 International Pulp Bleaching Conference