Comamonas denitrificans is a Gram-negative, oxidase- and catalase-positive, motile bacterium with a polar flagellum from the genus Comamonas and family Comamonadaceae, which was isolated from an activated sludge.

[3][4] Its colonies are yellow-white colored.

[4] Unlike other species of Comamonas, C. denitrificans can reduce nitrate to nitrogen gas.

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