혐기소화액에서분리한아질산산화세균의생장특성 (Growth Characteristics of Nitrite Oxidizing Bacteria Isolatedfrom Anaerobic Digestion Liquor)

서지정보

· 발행기관 : 유기성자원학회
· 수록지 정보 : 유기물자원화 / 18권 / 1호 / 73 ~ 80페이지
· 저자명 : 김영준, 장재은, 장현민

초록

음식물류폐기물혐기소화액으로부터아질산성질소를산화하는세균2종, NOB1 과NOB2를분리하여이들의아질산성질소산화능및온도, pH, 용존산소의농도에따른생장특성을조사하였다. 분리된두균주모두최적의생장조건은pH 7.0과배양온도35℃로나타났으며용존산소의농도가높을수록생장율이상승하는것으로나타났다. 두균주의생장을억제하는요인으로는pH와용존산소가효과적인것으로나타났는데, pH 5.0 및9.0에서, 용존산소1.0 ppm 이하에서생장율이현저히감소하는결과를보여주었다. 특히,아질산성질소의산화능력은1.0 ppm 이하의농도에서1.0 ppm 이상에서보다약50% 감소하는것으로나타났다. 두균주의생성율및질소산화능은NOB2가NOB1에비해약2배이상높은것으로조사되었다.

영어초록

Two nitrite oxidizing bacteria, NOB1 and NOB2, were isolated from anaerobic digester liquer offood wastewater and analyzed for their growth characteristics and the ability to oxidize nitriteunder different temperature, pH, and DO( dissolved oxygen) concentrations. Both of the isolatedstrains have shown the best growth at pH 7.0 and at 35℃, and also shown higher growth ratewith the increasing dissolved oxygen concentrations. As the factors to restrict the growth ofthese strains, parameters such as pH and DO were found to be effective ones, by increasing (upto 9.0) or decreasing pH (up to 5.0), or lowing DO below 1.0 ppm.Especially, the ability tooxidize nitrite in both strains was about 50% lower in below 1.0 ppm of DO than above of 1.0ppm. NOB2 was found to be two times greater in both the growth rate and the nitrite-oxidizingability than NOB1.

참고자료

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