Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Design and operating parameters of multi-functional floating island determined by basic experiments of unit processes

단위공정별 기초실험을 통한 다기능 융복합부도의 설계·운전인자 도출

  • Lim, Hyun-Man (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research) ;
  • Jang, Yeo-Ju (University of Science and Technology (UST), Smart City & Construction Engineering) ;
  • Jung, Jin-Hong (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research) ;
  • Yoon, Young-Han (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research) ;
  • Park, Jae-Roh (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research) ;
  • Kim, Weon-Jae (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
  • 임현만 (한국건설기술연구원 국토보전연구본부) ;
  • 장여주 (과학기술연합대학원대학교 스마트도시.건설융합) ;
  • 정진홍 (한국건설기술연구원 국토보전연구본부) ;
  • 윤영한 (한국건설기술연구원 국토보전연구본부) ;
  • 박재로 (한국건설기술연구원 국토보전연구본부) ;
  • 김원재 (한국건설기술연구원 국토보전연구본부)
  • Received : 2018.09.13
  • Accepted : 2018.10.25
  • Published : 2018.12.17
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Abstract

Water quality improvement processes for stagnant area consist mainly of technologies applying vegetation and artificial water circulation, and these existing technologies have some limits to handle pollution loads effectively. To improve the purification efficiency, eco-friendly technologies should be developed that can reinforce self-purification functions. In this study, a multi-functional floating island combined with physical chemical biological functions ((1) flotation and oxidization using microbubbles, (2) vegetation purification and (3) bio-filtration with improved adsorption capacity) has been developed and basic experiments were performed to determine the optimal combination conditions for each unit process. It has been shown that it is desirable to operate the microbubble unit process under conditions greater than $3.5kgf/cm^2$. In vegetation purification unit process, Yellow Iris (Iris pseudacorus) was suggested to be suitable considering water quality, landscape improvement and maintenance. When granular red-mud was applied to the bio-filtration unit process, it was found that T-P removal efficiency was good and its value was also stable for various linear velocity conditions. The appropriate thickness of filter media was suggested between 30 and 45 cm. In this study, the optimal design and operating parameters of the multi-functional floating island have been presented based on the results of the basic experiments of each unit process.

Keywords

References

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