Respiratory Inhibition of Sphaerotilus by Potassium Ferrate
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概要
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Potassium ferrate (K_2FeO_4) is a strong oxidant that might replace chlorine in the disinfection of water. K_2FeO_4 strongly inhibited the respiration of the bacterium Sphaerotilus, which frequently causes filamentous bulking in a ctivated sludge. To identify the mechanism by which K_2FeO_4 caused inhibitio, the distribution of iron sorbed by the bacterium was investigated by a modification of the method of Romano and Peloquin. Iron that penetrated into the cells inhibited the endogenous respiration of Sphaerotilus. The inhibition of the dehydrogenase activity of the bacterium by the ferrate was then studied. This enzyme activity was strongly inhibited by K_2FeO_4,but was restored by the addition of 2-mercaptoethanol. Lineweaver-Burk plots showed that K_2FeO_4 was a non-competitive inhibitor of the respiration of Sphaerotilus.
- 1989-06-25
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