Effect of Salinity on the Bacterial Community in the Sewage Treatment System

하수 처리 과정에서 염분이 세균 군집에 미치는 영향

  • 서미애 (강원대학교 환경과학과) ;
  • 홍선희 (강원대학교 환경과학과) ;
  • 김동주 (강원대학교 환경과학과) ;
  • 박경미 (강원대학교 환경과학과) ;
  • 안태석 (강원대학교 생물다양성연구소)
  • Published : 2001.06.01

Abstract

For elucidating the effect of salinity to the effect of wastewater treatment, the heterotrophic bacterial numbers, total bacterial numbers, and the bacterial community structure by FISH method were analyzed. The total bacterial numbers were not significantly changed by the salinity. But the heterotrophic bacterial numbers and bacterial community structures were drastically changed by the increase of salinity. In case of 1% salinity, the heterotrophic bacterial numbers and structure were slightly changed comparing to those of contol. In case of 2% and higher salinities, the numbers of heterotrophic bacteria and the proportions of Eubacteria, Proteobacteria $\alpha$-group, $\rho$-group and Cytophaga-Flavobacterium groups were deceasing. By these results, the salinity stress to bacterial community in waste water treatment was unveiled, and for sustaining the waste water treatment system, the salinity should be lower than 1%.

하수종말처리장의 처리효율에 미치는 염분의 영향을 알기 위하여 염분의 농도 변화에 따른 종속영양세균, 총세균 그리고 FISH 방법으로 세균 군집 구조를 파악하였다. 총세균수는 염분과 관계없이 큰 변화가 없었으나, 종속영양세균수와 군집구조는 염분에 따라 다르게 변화하였다. 염분이 1% 인 경우에는 대조구에 큰 변화가 없었으나, 염분이 2% 이상이 되면 종속영양세균과 Eubacteria의 비율이 줄어들고, 세균 군집도 큰 변화가 있었다. 특히 Proteobacteria $\alpha$-group, $\gamma$-group 및 Cytophaga-Flavobacterium group의 비율이 감소하였다. 염분이 증가하면, 종속영양세균수와 세균 군집이 변화하므로, 하수처리과정에서 염분이 유입될 경우에는 염분을 1% 이하로 유지하여야 한다.

Keywords

References

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