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Investigation of the influencing factors in odor emission from wet-end white water, TAPPI Journal October 2020
ABSTRACT: Emission of malodorous gases, such as volatile organic compounds (VOCs), hydrogen sulfide (H2S), and ammonia (NH3) during pulping and papermaking has caused certain harm to the air environment and human health. This paper investigated the influencing factors of odor emission from wet-end white water during the production of bobbin paper in a papermaking mill using old corrugated containers (OCC) as raw material. The concentration of malodorous gases emitted from wet-end white water was determined with pump-suction gas detectors. The results indicated that low temperature could limit the release of malodorous gases from white water. Specifically, no total volatile organic compounds (TVOC), H2S, and NH3 was detected at a temperature of 15°C. The concentrations of malodorous gases were slightly increased when temperature increased to 25°C. When temperature was 55°C, the released concentrations of TVOC, H2S, and NH3 were 22.3 mg/m3, 5.91 mg/m3, and 2.78 mg/m3, respectively. Therefore, the content of malodorous gases significantly increased with the temperature increase. The stirring of white water accelerated the release of malodorous gases, and the release rate sped up as the stirring speed increased. However, the total amount of malodorous gases released were basically the same as the static state. Furthermore, the higher the concentration of white water, the greater the amount of malodorous gases released. The pH had little influence on the TVOC release, whereas it significantly affected the release of H2S and NH3. With the increase of pH value, the released amount of H2S and NH3 gradually decreased. When pH reached 9.0, the release amount of H2S and NH3 was almost zero, proving that an alkaline condition inhibits the release of H2S and NH3.
Journal articles
Acid-insoluble and acid-soluble lignin characteristics in kraft pulping of hybrid salix clones, TAPPI JOURNAL August 1988
Acid-insoluble and acid-soluble lignin characteristics in kraft pulping of hybrid salix clones, TAPPI JOURNAL August 1988
Journal articles
Nonwood fiber: Number 2, and trying harder-An interview with Dr. Joseph E. Atchison, TAPPI JOURNAL August 1988
Nonwood fiber: Number 2, and trying harder-An interview with Dr. Joseph E. Atchison, TAPPI JOURNAL August 1988
Journal articles
A wet-laid process for the preparation of random fiber-reinforced composites, TAPPI JOURNAL August 1988
A wet-laid process for the preparation of random fiber-reinforced composites, TAPPI JOURNAL August 1988
Journal articles
A fast-track approach through the design and permit phases for an ash landfill, TAPPI JOURNAL August 1988
A fast-track approach through the design and permit phases for an ash landfill, TAPPI JOURNAL August 1988
Journal articles
Significance of PM10 regulations for the forest products industry, TAPPI JOURNAL August 1988
Significance of PM10 regulations for the forst products industry, TAPPI JOURNAL August 1988
Journal articles
Fibers properties and tearing resistance, TAPPI JOURNAL February 1988 88FEB103
Fibers properties and tearing resistance, TAPPI JOURNAL February 1988
Journal articles
Meltblown polyester solves a food processing filtration problem, TAPPI JOURNAL February 1988 88FEB79
Meltblown polyester solves a food processing filtration problem, TAPPI JOURNAL February 1988
Journal articles
The influence of headbox flow conditions on paper properties and their constancy, TAPPI JOURNAL February 1988 88FEB93
The influence of headbox flow conditions on paper properties and their constancy, TAPPI JOURNAL February 1988
Journal articles
High-solids black liquor combustion-Tampella's Super Combustion system, TAPPI JOURNAL January 1988 88JAN107
High-solids black liquor combustion-Tampella's Super Combustion system, TAPPI JOURNAL January 1988