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IJESD 2015 Vol.6(6): 419-424 ISSN: 2010-0264
DOI: 10.7763/IJESD.2015.V6.629

Purification of Deep Water in a Dam Lake Using Micro-Bubbles and/or Eco-Bio-Ring

M. Sadatomi, A. Kawahara, K. Kurogawa, and T. Akasaki

Abstract—This study is aiming at finding an efficient method to purify deep water in Midorikawa-dam Lake in Kumamoto Pref., Japan. The biological oxygen demand (BOD) of the water at first was 46 mg/L in the worst case. In the test, micro-bubbles were periodically supplied into the water in 80 L tank by a multi-fluids-mixer patented by Sadatomi and Kawahara. The bubbling rate were changed as QG = 1.0 L/min and 2.0 L/min to study its effect. In addition, the Eco-Bio-Ring including aerobic bacteria (Bacillus bacterium), sold by Big Bio Co. Ltd., Japan, were immersed in two tanks of the three in order to study its effect. As a result, it was cleared that QG = 1.0 L/min was enough to reduce the BOD to about 6-10 mg/L within two weeks, and the Eco-Bio-Ring was effective to reduce turbidity.

Index Terms—Aerobic bacteria, lake, micro-bubble, water purification.

M. Sadatomi, A. Kawawara, K. Kurogawa, and T. Akasaki are with the Dept. of Advanced Mechanical Systems, Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan (e-mail: sadatomi@mech.kumamoto-u.ac.jp, akimaro@mech.kumamoto-u.ac.jp).


Cite:M. Sadatomi, A. Kawahara, K. Kurogawa, and T. Akasaki, "Purification of Deep Water in a Dam Lake Using Micro-Bubbles and/or Eco-Bio-Ring," International Journal of Environmental Science and Development vol. 6, no. 6, pp. 419-424, 2015.

General Information

  • ISSN: 2010-0264 (Print); 2972-3698 (Online)
  • Abbreviated Title: Int. J. Environ. Sci. Dev.
  • Frequency: Bimonthly
  • DOI: 10.18178/IJESD
  • Editor-in-Chief: Prof. Richard Haynes
  • Executive Editor: Ms. Nancy Y. Liu
  • Indexing: Scopus (CiteScore 2021: 0.8), Google Scholar, CNKI, ProQuest, EBSCO, etc. 
  • E-mail: ijesd@ejournal.net