Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Modeling of Ammonia Mass Transfer Using a Hollow Fiber Membrane Contactor

중공사막 접촉기를 이용한 암모니아 물질전달 모델링

  • 오대양 (한양대학교 건설환경공학과) ;
  • 정주영 (한양대학교 건설환경공학과) ;
  • 최원호 (한양대학교 건설환경공학과) ;
  • 박주양 (한양대학교 건설환경공학과)
  • Published : 2011.08.15
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Abstract

Ammonia in water which is toxic to human, its concentration is regulated below 0.5 mg/L in drinking water. Current study aimed to develop appropriate models for ammonia stripping using hollow fiber membrane contactor. Two different models were developed during the study. Model 1 was assumed only free ammonia ($NH_3$) transfer in stripping process, whereas the Model 2 was assumed with total ammonia ($NH_3+{NH_4}^+$) transfer. Ammonium chloride ($NH_4CI$), sodium hydroxide(NaOH) were used to make ammonia solution, which was concentration of 25 mg as N/L at a pH of 10.5. The experimental conditions were such that, the liquid flow was in tube-side in upward direction and t he gas flow was on shell-side in downward direction a t room temperature. The experimental and modeling results showed that marginal difference were observed at low gas flux. However the difference between the both models and experimental value were increased when the gas flux was increased. The study concludes that the Model 1 with free ammonia is more appropriate when both models were compared and useful in ammonia stripping process at low gas flux.

Keywords

References

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