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Substitutability of coagulation process by pre-treatment of coagulation·flotation using natural algae coagulant

천연조류제거제를 활용한 응집·부상 전처리공정의 기존 응집공정 대체 가능성

  • Jang, Yeo-Ju (E.D.R Landscaping Industry Co., LTD.) ;
  • Jung, Jin-Hong (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lim, Hyun-Man (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Chang, Hyang-Youn (University of Science & Technology) ;
  • Kim, Weon-Jae (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 장여주 (에덴녹화산업(주)) ;
  • 정진홍 (한국건설기술연구원 환경.플랜트연구소) ;
  • 임현만 (한국건설기술연구원 환경.플랜트연구소) ;
  • 장향연 (과학기술연합대학원대학교 건설환경공학과) ;
  • 김원재 (한국건설기술연구원 환경.플랜트연구소)
  • Received : 2016.12.02
  • Accepted : 2017.02.02
  • Published : 2017.02.28

Abstract

In the coagulation/sedimentation (C/S) process of the water treatment process, the inflow of massive algal bloom causes many problems including fouling of filter media. This study was conducted to find out the way to remove the algae's harmful effects by addition of pre-treatment prior to C/S process. Many Jar-tests were conducted such as (1) ACF (Algae Coagulation Flotation) process using natural algae coagulant (Water $Health^{(R)}$), (2) ACF + C/S process and (3) C/S process with a variety of conditions using cultured algae. The average values of turbidity were (1) 0.42 NTU for ACF process, (2) 0.13 NTU for ACF + C/S process and (3) 0.25 NTU for C/S process. It was shown that the treatment efficiency of ACF process could get low turbidity results, and ACF + C/S process could achieve more efficient results than those of C/S process. Any negative effects of ACF process to the efficiency of C/S process were not observed in ACF + C/S process. In order to reduce the unfavorable effects of algae, it was found out that the introduction of ACF process in the forms of (1) ACF or (2) ACF + C/S could be one of the effective and alternative solutions.

Keywords

References

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