diaphorobacter nitroreducens diaphorobacter nitroreducens diaphorobacter nitroreducens is a gram-negative bacterium from the genus of diaphorobacter which has been isolated from activated sludge in japan. diaphorobacter nitroreducens scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: diaphorobacter species: d. nitroreducens binomial name diaphorobacter nitroreducenskhan and hiraishi 2003 type strain cip 107294, dsm 15985, jcm 11421, na10b