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KMID : 0380020070220030162
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Korean Journal of Biotechnology and Bioengineering
2007 Volume.22 No. 3 p.162 ~ p.167
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Ammonia Gas Removal by Bacillus subtilis IB101 and Optimization of Culture Media
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Kim So-Young
Noh Yong-Ho
Kang Sung-Gak
Kim Young-Bum
Jang Woo-Jin
Kim Dong-Joon
Yun Hyun-Shik
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Abstract
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Ammonia gas is one of the major pollutants which cause environmental pollution and damage to the human and the livestock. The objective of this study was to investigate the important parameters for the development of efficient removal of ammonia gas by Bacillius subtilis IB101 and to optimize the medium composition for the mass production of B. subtilis IB101. The ammonia gas removal efficiency was evaluated at different growth phases and by changing culture conditions (temperature, pH). The effect of (NH4)2SO4 concentration in preculture medium was examined. Medium optimization for the mass production of B. subtilis IB101 was performed by using Plackett-Burman design and one factor at a time method. The removal of ammonia gas was more efficient at exponential phase by 20% than at stationary phase. The ammonia gas removal was the highest at pH 4 and 30 ℃. There was not any significant influence of concentration of (NH4)2SO4 on the removal of ammonia gas. The components of optimized medium for the production of viable Bacillus subtilis IB101 was yeast extract 10 g/l, soluble starch 2.5 g/l, MgSO4 6 g/l, CaCl2 1.55 g/l, (NH4)2SO4 5 g/l, KH2PO4 0.75 g/l, soy bean meal 8 g/l.
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KEYWORD
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Ammonia gas, Bacillius subtilis IB101
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