Characterization of a newly isolated strain Comamonas sp. ZF-3 involved in typical organics degradation in coking wastewater

Abstract

The aim of this study was to investigate the characteristic of a newly isolated strain Comamonas sp. ZF-3 involved in typical organics degradation in coking wastewater (CWW). The results showed that the isolated strain had efficient biodegradability of phenolic compounds and heterocyclic compounds in CWW, meanwhile, phenol and indole could be respectively used as sole carbon source for its growth, which demonstrated the bioaugmentation potential of the isolated strain in CWW treatment. During phenol and indole degradation processes, part of metabolites (e.g., 2,3-hexanedione, 2-ethyl-1-hexanol, nonanal, 2-propyl-1-heptanol, butanoic acid, butyl ester and butanoic acid, anhydride) remained in effluents, with NH4+-N concentration having no obvious reduction, which implied the biological treatment of CWW should be accomplished by complex microbial communities in many steps.