Journal of the Korean Society for Environmental Technology (한국환경기술학회지)

Korean Society for Environmental Technology (한국환경기술학회)
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A Study on Efficiency of Wastewater Treatment using Microalgae: Focusing on Nutrients and Flocculation

미세조류를 이용한 폐수처리 효율에 관한 연구: 영양염류 및 응집을 중심으로

  • Hwang, Ho-Yeon (Dept. of Environmental Engineering, Mokpo National University) ;
  • Song, Jee-Jun (Dept. of Environmental Engineering, Mokpo National University) ;
  • Kim, Mi-Suk (Dept. of Environmental Engineering, Mokpo National University) ;
  • Kim, Do-Yong (Dept. of Environmental Engineering, Mokpo National University)
  • 황호연 (목포대학교 환경공학과(기후변화연구소)) ;
  • 송재준 (목포대학교 환경공학과(기후변화연구소)) ;
  • 김미숙 (목포대학교 환경공학과(기후변화연구소)) ;
  • 김도용 (목포대학교 환경공학과(기후변화연구소))
  • Received : 2018.11.05
  • Accepted : 2018.12.21
  • Published : 2018.12.31
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Abstract

The efficiency of wastewater treatment using microalgae was investigated in this study, focusing on nutrients and flocculation. In the experiments for reducing nutrients by incubation of microalgae, the total phosphorus and total nitrogen were removed over 92 % and 99 %, respectively. The higher flocculation rates as the average values 94% of Poly Aluminum Chloride(PAC) and 92 % of $FeCl_3$ were presented for the flocculation experiments under the conditions of Auto-flocculation and various additives. Also, the optimal(minimal) concentrations for over 90 % of flocculation were 30 mg/L and 40 mg/L for PAC and $FeCl_3$, respectively.

본 연구에서는 영양염류 및 응집을 중심으로 미세조류를 이용한 폐수처리 효율에 관한 연구를 수행하였다. 미세조류 배양을 통한 폐수의 영양염류 저감의 가능성을 확인하기 위하여 미세조류의 배양에 따른 인 및 질소의 제거율을 관찰한 결과, 각각 약 92 % 및 99 % 이상의 제거율을 보였다. 효율적인 미세조류의 회수를 위하여 Auto-flocculation 조건 및 다양한 첨가물에 따른 응집실험을 진행한 결과, 응집제인 PAC(Poly Aluminum Chloride) 및 $FeCl_3$를 첨가한 경우에 각각 평균 94 % 및 92 %의 높은 응집율을 보였다. 또한, 최소한의 농도로 90 % 이상의 응집율을 보이는 최적의 조건을 찾기 위하여 응집제별 최적농도 산출 실험을 진행하였으며, 그 결과 PAC는 30 mg/L, $FeCl_3$는 40 mg/L가 최적의 농도임을 확인하였다.

Keywords

References

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