flavobacterium filum flavobacterium filum flavobacterium filum is a gram-negative and non-motile bacterium from the genus of flavobacterium which has been isolated from activated sludge from a wastewater treatment plant from pohang in korea. flavobacterium filum scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: flavobacterium species: f. filum binomial name flavobacterium filumryu et al. 2007 type strain cip 109743, dsm 17961, emb34, kctc 12610, lmg 24723