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Management and Benefits of Pulp and Paper Mill Residuals, 2003 Environmental Conference Proceedings

Management and Benefits of Pulp and Paper Mill Residuals, 2003 Environmental Conference Proceedings

Presence and Persistence of Pathogens in Residual and Residual-Applied Soils in the Peace River Region, British Columbia, 2003 Environmental Conference Proceedings

Presence and Persistence of Pathogens in Residual and Residual-Applied Soils in the Peace River Region, British Columbia, 2003 Environmental Conference Proceedings

Selection and Experience with VOC and HAPS Control Technologies at Wood Products Plants, 2003 Environmental Conference Proceedings

Selection and Experience with VOC and HAPS Control Technologies at Wood Products Plants, 2003 Environmental Conference Proceedings

MACT 1 Alternative: A Five-Fold Improvement in HAP Control, 2003 Environmental Conference Proceedings

MACT 1 Alternative: A Five-Fold Improvement in HAP Control, 2003 Environmental Conference Proceedings

´We Must Grow—In All Areas’, Paper360º May/June 2020

´We Must Grow—In All Areas’, Paper360º May/June 2020

Wireless Sensors Improve Toxic Gas Mitigation in P&P Mills, Paper360º May/June 2020

Wireless Sensors Improve Toxic Gas Mitigation in P&P Mills, Paper360º May/June 2020

TAPPI Journal Summaries, Paper360º November/December 2020

TAPPI Journal Summaries, Paper360º November/December 2020

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.

Industrial Hemp as a possible replacement for NBSK pulp, TAPPICon25

Preventing Rewet in Press Section to Reduce Dewatering Energy Consumption, TAPPICon25