• 한국토양비료학회지
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• 제46권6호
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• pp.673-680
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• 2013

Phosphorus accumulating microorganisms (PAOs) are influenced by various environmental factors and heavy metals. This study was performed to evaluate the effects of the selected heavy metals on the growth and phosphorus removal capacity of Bacillus sp. 3434 BRRJ, Pseudomonas aerunogisa, and Bacillus Subtilis, well known as PAOs. The heavy metals used in this study included Cu, Cd, As, and Zn. The $IC_{50}$ (median inhibition concentration) values of Bacillus sp. 3434 BRRJ for the Cu, Cd, As, and Zn were 8.07 mg $L^{-1}$, 0.18 mg $L^{-1}$, 73.62 mg $L^{-1}$ and 0.25 mg $L^{-1}$, respectively. The $IC_{50}$ values of Pseudomonas aerunogisa for the Cu, Cd, As, and Zn were 4.45 mg $L^{-1}$, 0.16 mg $L^{-1}$, 18.51 mg $L^{-1}$ and 2.34 mg $L^{-1}$, respectively. The $IC_{50}$ values of Bacillus Subtilis for the Cu, Cd, As, and Zn were 3.81 mg $L^{-1}$, 0.18 mg $L^{-1}$, 11.31 mg $L^{-1}$ and 0.47 mg $L^{-1}$, respectively. The phosphorus removal efficiencies of the three bacteria, Bacillus sp. 3434 BRRJ, Pseudomonas aerunogisa, and Bacillus subtilis were 93.12%, 71.81%, and 65.31%, respectively. Based on the results of the three PAOs obtained from the study, it appears that Bacillus sp. 3434BRRJ may have the best results in terms of their growth rate and P removal efficiencies.

• 한국환경농학회지
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• 제30권2호
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• pp.216-222
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• 2011

Alcaligenes sp.의 인 제거에 대한 환경인자로 각각 온도, pH, 탄소원의 효과를 알아본 결과 $25^{\circ}C$, pH 7, glucose+acetate이 탄소원일 때 인 제거효율이 가장 좋은 것으로 확인 할 수 있었다. 5가지 중금속의 독성효과에 따른 Alcaligenes sp.의 생장은 중금속의 농도가 높아질수록 억제되었으며, $IC_{50}$값은 구리 5.03 mg/L, 카드뮴 0.08 mg/L, 아연 0.73 mg/L, 비소 282.20 mg/L, 니켈 4.74 mg/L로 나타났다. 모든 중금속의 농도가 높아질수록 생장이 억제되어 인 제거 역시 억제되는 것을 확인 할 수 있었다.