DOI QR코드

DOI QR Code

CHARACTERISTICS OF A WATER-PURIFICATION SYSTEM USING IMMOBILIZED PHOTOSYNTHETIC BACTERIA BEADS

  • Kim, Joong-Kyun (Division of Food Science and Biotechnology Pukyong National University) ;
  • Park, Kyoung-Joo (Division of Food Science and Biotechnology Pukyong National University) ;
  • Cho, Kyoung-Sook (Division of Food Science and Biotechnology Pukyong National University) ;
  • Nam, Soo-Wan (Department of Biotechnology and Bioengineering, Dong-Eui University) ;
  • Kim, Yong-Ha (Division of Chemical Engineering, Pukyong National University)
  • 발행 : 2005.10.31

초록

The characteristics of nitrogen removal by the free cell and the immobilized cell of R. capsulatus were investigated. Denitrification by R. capsulatus cells resulted in reduction of ORP with the rapid depletion of DO and the increase of pH. Without accumulation of nitrite, the removal efficiencies of ${NO_3}^-$-N for the free cell and the immobilized cell were 99.1 and 99.3%, respectively. During the three-month experiment of goldfish breeding equipped with a water-purification biofilter, the average values of pH and total cell numbers present in an aquarium were not significantly different between water-purification system and the control. The average concentrations of ${NH_4}^+$-N and ${PO_4}^{2-}$-P in water-purification system were relatively low, compared to that in the control. Goldfish died at $11^{th}$, $16^{th}$, $43^{rd}$, and $67^{th}$ days in the control, while goldfish died at $10^{th}$, $20^{th}$, and $39^{th}$ days in the water-purification system. On the days of goldfish's death, the total concentrations of nitrogenous compounds except for ${NO_2}^--N$ were higher than those on the other days of the experiment, especially with the concentrations of ${NH_4}^+$-N ranging from 7.4 to 13.5 mg/L. The water-purification system also showed the less turbidity of water with more active movement of goldfish than the control. PVA gel beads showed almost the full denitrifying ability even after the long-term experiment. As a result, the water-purification system was effective to remove nitrogenous compounds with better survival of goldfish.

키워드

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피인용 문헌

  1. Purification of aquarium water by PVA gel-immobilized photosynthetic bacteria during goldfish rearing vol.14, pp.2, 2009, https://doi.org/10.1007/s12257-008-0195-0
  2. EFFECTS OF THE HERBICIDE, BUTACHLOR, ON NITROGEN FIXATION IN PHOTOTROPHIC NONSULFUR BACTERIA vol.12, pp.4, 2007, https://doi.org/10.4491/eer.2007.12.4.136