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Evaluation of the Effect of High Salinity RO Concentrate on the Microbial Acclimation/Cultivation Characteristics in Biological Wastewater Treatment Process

RO 농축수내 고농도 염분이 생물학적 폐수처리공정내 미생물 순응/배양에 미치는 영향평가

  • 김연권 (한국수자원공사 K-water연구원) ;
  • 강석형 (한국수자원공사 K-water연구원)
  • Received : 2012.09.03
  • Accepted : 2012.09.21
  • Published : 2012.10.31

Abstract

There are a lot of parameters affecting microbial acclimation/cultivation characteristics such as dynamic conditions, F/M ratio and substrate affinity. From the process control point of view, the effect of high salinity on the removal efficiencies of BOD and SS have been documented by few researchers. In this research, lab-scale CAS(Conventional Activated Sludge) process and modified $A_2O$(Anaerobic/Anoxic/Oxic) process were operated and monitored to evaluate the characteristics of microbial acclimation and cultivation under high salinity wastewater during the period of three weeks. As a result of acute microbial activity test(6hr) at various $Cl^-$ concentration, the appropriate $Cl^-$ concentration for microbial growth and acclimation ranged under 3,100 mg/l. As a result of acclimation/cultivation test, the trend of COD removal efficiency reduced gradually as time elapsed. It is considered that $NH_4$-N removal phenomenon of the conventional pollutants removal mechanisms gave little effect to the microbial acclimation/cultivation under high salinity wastewater.

Keywords

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