<論文>生物学的有機物窒素の同時除去に関する基礎的研究 : 脱窒菌の増殖特性

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Pseudomonas denitrificans were cultivated in a flask. Then the influence of total ion concentration, nitrate concentrtion, nitrite concentration and pH on the growth was considered. The results are the following. THe glowth velocity on aerobic condition was 1.5 times as large as that on anaerobic condition. The growth may be inhibited over 1.0g-ion/l of the total ion concentration on aerobic and anaerobic condition. On aerobic condition, when ammonium was sufficient to increase, nitrate was not related with the growth. On the one hand, on anaerobic condition, when nitrate was sufficient to increase, ammonium was not necessarily. But the high concentration of nitrate inhibited the growth by the formation of nitrite, and the low concentration of nitrate could not enough promote the growth. The suitable concentration of nitrate may be about 5.0×10^<-2>mol/l. When the initial pH was prepared between pH 5.2 and pH 9.3,P. denitrificans increased, while they did not increase at the lower than pH 5.2 or the higher than pH 9.3. We got 0.151 hr^<-1> for μ_<max> anaerobic condition.
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