Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Particle Separation Characteristics and Harvesting Efficiency of Spirulina platensis Using Micro-bubble

미세기포를 이용한 Spirulina platensis의 입자 부상분리 특성 및 수거효율

  • Gwak, Gyu-Dong (Department of Environmental Engineering, Chonbuk University) ;
  • Kim, Mi-Sug (Korean Urban Regeneration Technology Institute) ;
  • Kwak, Dong-Heui (Department of Environmental and Chemical Engineering, Seonam University)
  • 곽규동 (전북대학교 환경공학과) ;
  • 김미숙 ((사)한국도시재생기술연구원) ;
  • 곽동희 (서남대학교 환경화학공학과)
  • Received : 2013.09.23
  • Accepted : 2013.10.15
  • Published : 2013.10.15
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Abstract

Since algae had been issued an environmental problem, water blooms, deepened due to increase of retention water basin in Korea as well as a biomass resource for producing biofuel, this study conducted a series of experiments for Spirulina platensis using the flotation process with micro-bubble. To elevate utilization of collected-algae, this study focused on omitting or minimizing coagulant's doses as changing a cultivation period and condition affected on physical property change of algae. Two coagulants, PAC and Chitosan, were used to test the collecting rate of algae and the result found no difference between two rates. For flotation experiments without adding the coagulant, dried algae weight (passing 14 days after cultivation for 20 days) detected high separation efficiency 98.2 % and it (passing 7 days after long-term cultivation for 28 days) presented good separation efficiency 91.9 %. Chlorophyll's separation efficiency showed a similar tendency with the case of the dried algae weight. In endogeny conditions, a light source and a carbon source were not considerably affected on the flotation separation efficiency. Thus, this study confirms that algae biomass may be collected without the coagulant during the endogeny condition period after enough cultivation time, 3 weeks.

Keywords

References

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