Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Ammonia Nitrogen Removal in Wastewater Using Microwave Irradiation

마이크로웨이브를 이용한 폐수 내 고농도 암모니아성질소 제거

  • Shin, Soyeun (Department of Environmental Engineering, Kangwon National University) ;
  • Koo, Bonheung (Department of Environmental Engineering, Kangwon National University) ;
  • Kim, Taehyun (Department of Environmental Engineering, Kangwon National University) ;
  • Lee, Yuhak (Department of Environmental Engineering, Kangwon National University) ;
  • Ahn, Johng-Hwa (Department of Environmental Engineering, Kangwon National University)
  • Received : 2014.07.01
  • Accepted : 2014.08.12
  • Published : 2014.09.30
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Abstract

Industrial use of microwave heating as an alternative to conventional heating is becoming popular mainly due to dramatic reductions in reaction time. Therefore, this work experimentally determined the effect of microwave irradiation on ammonia nitrogen removal in wastewater. The effects of air flow rate (0.3~0.9 L/min), treatment temperature ($70{\sim}100^{\circ}C$), and initial pH (9~11) were characterized. As the air flow rate increased from 0.3 to 0.9 L/min, the ammonia removal rate constant (k) increased from -0.6642 to $-1.0755min^{-1}$. As the temperature increased from 70 to $100^{\circ}C$, k increased -0.0338 to $-1.0755min^{-1}$. As the pH increased from 9 to 11, k increased -0.2443 to $-1.0755min^{-1}$. Ammonia removal was strongly dependent on temperature and pH rather than air flow rate. The results show that microwave irradiation is effective in ammonia nitrogen removal in wastewater due to advantages of fast and effective processing.

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References

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