Distribution and Characterization of Heterotrophic Bacteria Isolated from Deodorizing Biofilters of a Nightsoil Treatment Plant

분뇨처리장의 질소성 악취물질처리를 위한 생물탈취탑내 종속영양세균의 분포 및 특성

  • Chung, H.M. (Water Quality Research Dept. National Institute of Environmental Research) ;
  • Kweon, O.Y. (Water Quality Research Dept. National Institute of Environmental Research) ;
  • Kim, D.B. (Water Quality Research Dept. National Institute of Environmental Research) ;
  • Ryu, J.K. (Water Quality Research Dept. National Institute of Environmental Research)
  • 정현미 (국립환경연구원 수질연구부) ;
  • 권오영 (국립환경연구원 수질연구부) ;
  • 김동빈 (국립환경연구원 수질연구부) ;
  • 류재근 (국립환경연구원 수질연구부)
  • Received : 1998.06.05
  • Accepted : 1998.09.25
  • Published : 1998.12.01

Abstract

The distributions and characteristics of bacteria on the deodorizing biofilters were studied as a part of biofiltration research for odor gas removal. The odor gas originated from a currently operating nightsoil treatment plant were mainly nitrogenous compounds of ammonia and amines. The filter media were consisted various ratio of pine bark, nightsoil cast and compost, and were sampled before and after operation of 153 days. Before operation, the level of bacteria on nitrification agar medium, nutrient agar medium and thiosulfate agar medium were around $10^7{\sim}10^8cfu/g$ media. After operation, the level decreased but still high as $10^5{\sim}10^7cfu/g$ media. The bacteria from reactors before and after operations were either rod or coccus after growth on nitrification agar media. The 45 isolated heterotrophic bacteria were further characterized and Pseudomonas, Bacillus, Flavobacterium, Alcaligenes were dominant genera. Genus Alcaligenes was particularly dominant when the isolates were incubated on nitrification agar media first and then transfered to nutrient media. The portion of Alcaligenes in the biofilter increased after operation, and was higher in the media contained nightsoil cast, which showed better treatment than the media with pine bark only.

Keywords

Alcaligenes sp.;biofiltration;odor control of nightsoil treatment