nitrobacter alkalicus nitrobacter alkalicus nitrobacter alkalicus is a nitrite-oxidizing bacteria from the genus of nitrobacter. nitrobacter alkalicus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: nitrobacter species: n. alkalicus binomial name nitrobacter alkalicussorokin et al. 1999 type strain an1, lmd 97.163