Production and partial characterization of bioemulsifier from a chromium-resistant actinobacteria

► The first study on emulsifiers production by Streptomyces sp. MC1 is presented. ► The cultivation factors have a significant influence on emulsifier production. ► Streptomyces sp. MC1 is able to produce emulsifier in presence of Cr(VI). ► Emulsifier presented high thermo-stability and partial water solubility. ► Emulsifiers possess promising prospects for remediation of metal-contaminated sites.