Treatment of Malodorous Waste Air Containing Ammonia Using Biofilter System

바이오필터시스템을 이용한 암모니아 함유 악취폐가스 처리

  • Lee, Eun Ju (Department of Chemical Engineering, Kyungpook National University) ;
  • Park, Sang Won (Department of Food Engineering, Daegu University) ;
  • Nam, Dao Vinh (Department of Chemical Engineering, Daegu University) ;
  • Chung, Chan Hong (Department of Chemical Engineering, Daegu University) ;
  • Lim, Kwang-Hee (Department of Chemical Engineering, Daegu University)
  • 이은주 (경북대학교 화학공학과) ;
  • 박상원 (대구대학교 식품공학과) ;
  • 다오빈남 (대구대학교 화학공학과) ;
  • 정찬홍 (대구대학교 화학공학과) ;
  • 임광희 (대구대학교 화학공학과)
  • Received : 2010.05.27
  • Accepted : 2010.06.11
  • Published : 2010.06.30

Abstract

In this research the characteristics of ammonia removal from malodorous waste-air were investigated under various operating condition of biofiilter packed with equal volume of rubber media and compost for the efficient removal of ammonia, representative source of malodor frequently generated at compost manufacturing factory and publicly owned facilities. Then the optimum conditions were constructed to treat waste-air containing ammonia with biofilter. Biofilter was run for 30 days(experimental frequency of 2 times/day makes 60 experimental times.) with the ammonia loading from $2.18g-N/m^3/h$ to $70g-N/m^3/h$ at $30^{\circ}C$. The ammonia removal efficiency reached almost 100% for I through IV stage of run to degrade up to the ammonia loading of $17g-N/m^3/h$. However the removal efficiency dropped to 80% when ammonia loading increased to $35g-N/m^3/h$, which makes the elimination capacity of ammonia $28g-N/m^3/h$ for V stage of run. However, the removal efficiency remained 80% and the maximum elimination capacity reached $55g-N/m^3/h$ when ammonia loading was doubled $70g-N/m^3/h$ for VI stage of run. Thus the maximum elimination capacity exceeded $1,200g-N/m^3/day$(i.e., $50g-N/m^3/h$) of the experiment of biofilter packed with rock wool inoculated with night soil sludge by Kim et al.. However, the critical loading did not exceed $810g-N/m^3/day$ (i.e., $33.75g-N/m^3/h$) of the biofilter experiment by Kim et al.. The reason to exceed the maximum elimination capacity of Kim et al. may be attributed to that the rubber media used as biofilter packing material provide the better environment for the fixation of nitrifying and denitrification bacteria to its surface coated with coconut based-activated carbon powder and well-developed inner-pores, respectively.

Keywords

Biofilter;Malodorous Waste-Air;Ammonia;Optimum Operating Condition;Rubber Media

Acknowledgement

Supported by : 한국학술진흥재단

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