Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Development of a Hydroponic Recycle System using the Visible Light-reactive Titanium Dioxide Photocatalyst for Sterilization of Nutrient Solution(I) - Determination of factors -

가시광 감응형 광촉매에 의한 수경재배용 배양액의 재이용 살균시스템 개발(I) - 광촉매 필터 요인시험 -

  • Chung, Sung-Won (Dept. of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Ha, Yu-Shin (Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Lee, Jong-Won (Agriculture Civil Engineering, Kyungpook National University) ;
  • Park, Jong-Min (Dept. of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Kwon, Soon-Hong (Dept. of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Lee, Ki-Myung (Bio-Industrial Machinery Engineering, Kyungpook National University)
  • Received : 2010.09.28
  • Accepted : 2010.11.17
  • Published : 2010.12.25
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Abstract

We produced a basic system of sterilization of nutrient solution based on the characteristics of coated filter with the visible light-reactive titanium oxide photocatalyst according to the findings of the first stage. We developed a model system with a proper number and arrangement of filter elements, the visible light-reactive titanium oxide photocatalyst according to findings from the basic performance test. Main results of this study were as followers; The ceramic filters showed the best performance of sterilization of nutrient solution. The visible light-reactive titanium oxide photocatalyst sterilized more effectively the nutrient solution under the sunlight than UV light. The sterilization performance by passing repeatedly through a few filter was more efficient than that by treating simultaneously with a large number of filters. The filter with 15ppi in pore size, 20 mm in thickness, and 3 layers in titanium oxide coating was desirable in the intensity and sterilization performance.

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References

  1. Benoit, F. 1992. Practical guide for simple soilless culture techniques. p. 33. European Vegetable R&D center, Belgium.
  2. Lee, I. H. 1999. Development of equipment for recycling of nutrient solution in green house by utilizing of UV-photocatalytic disinfection. Final report of the research project, Ministry Agticulture & Forestry, Gwacheon, Republic of Korea.
  3. Lee, K. M. 2007. Development of a Hydroponic Recycle System using the Visible Light-reactive Titanium Oxide Photocatalyst for Sterilization and Purification of Nutrient Solution. Final report of the research project, Ministry Agticulture & Forestry, Gwacheon, Republic of Korea.
  4. Miyama, Y., K. Sunada and K. Hashimoto. 2002. Photocatalytic water treatment of tomato hydroponic culture system using solar light. Proceedings of the 14th International conference on photochemical conversion and storage of solar energy W2-P-34.
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