생명과학회지 (Journal of Life Science)

  • 제9권3호
  • /
  • Pages.268-275
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  • 1999
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
권호 표지

폐수처리를 위한 고정화 Rhodopseudomonas sp.균의 특성

Characteristics of Immobilized Rhodopseudomonas sp. for Wastewater Treatment

  • 이범규 (부경대학교 식품생명공학부 생물공학전공) ;
  • 김상희 (부경대학교 식품생명공학부 생물공학전공) ;
  • 김중균 (부경대학교 식품생명공학부 생물공학전공)
  • 발행 : 1999.06.01
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초록

고저화된 Rp.palustris균을 이용한 양식장 폐수주으이 질산염 제거를 위하여 Rp.palustris균의 고정화를 위한 담체를 조사하였는데, 탈질능력과 내구성을 실험한 결과 agar,k-carrageenan,그리고 PVA 3종의 담체주우 3% agar가 가장 적합한 담체이었다.Agar bead 내부로의 기질 이동 및 sheer stress를 고려해볼 때 최적 bead 크기는 직경 4mm 였고,접종되는 세포의 양은 25mg dry $cells/cm^2$gel 이었다. 탄소원으로 ethanol이 가장 적합하였고,최적 C:N ratio는 1.5이며,온도와 pH는 각각$31^{\circ}C$,PH 6 이었다. 이러한 조건에서의 최대 탈질율은 인공합성폐수의 경우 $345{\MU}{\ell};N_2/Cm^3 gel{\cdot}hr;이었으며,;modifed MYC 배지의; 경우는; 450{\MU}{\ell}};N_2/Cm^3 gel{\cdot}hr $이었다.

Rhodopseudomonas sp. was immobilized in three supports(agar, k-carrageenan, and PVA) in order to remove nitrate in wastewater coming from fish farm. Among them 3% agar was the most suitable support when denitrification rate and bead durability were tested. Optimum bead size was 4mm-diameter when the substrate transfer into the bead and shear stress for bead were considered, and optimum cell loading was 25mg dry $cells/cm^2$gel gel. Ethanol was the best as a carbon source, and optimum C:N ratio, temperature and pH were 1.5:1, $31^{\circ}C$,, and 6, respectively. Under these conditions the maximum denitrification rate in synthetic wastewater was $$345{\MU}{\ell};N_2/Cm^3 gel{\cdot}hr;and that in modified MYC medium was 450{\MU}{\ell}};N_2/Cm^3 gel{\cdot}hr $$.

키워드

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