Microbial bioremediation of heavy metals from effluent discharge of metal processing industries

Abstract

In this study the microbial bioremediation was carried out from effluent discharge of metal processing industries using the isolate bacterial strains. The microbiological analysis total of 6 industrial effluents samples were collected from various industries, and total of 42 isolates were obtained among these isolates Achromobacter sp. (8), predominantly obtained followed by Bacillus sp. (5), Shigella sp. (7), Salmonella sp. (7), Pseudomonas sp. (5), Corynebacterium sp. (3), Staphylococcus sp. (3), Proteus sp. (2), Exigoubacterium sp. (1) and Microbacterium (1), among them one isolate SR6a (Achromobactor) was resistant to Cu at higher concentration (2000ppm) and considered as potential heavy metal degrading isolate. The some isolates such SR3f (Bacillus), SR4g (Achromobactor), SR5c (Bacillus), and SR3a (Pseudomonas) were multi heavy metal degrading ones. All these isolates from metal industrial effluents showed the heavy metal resistance against Copper, Nickel, Cadmium, Zinc and Mercury. the isolate SR6a identified as Achromobactor sp. was able to degrade the heavy metal up to 3000 ppm concentration and can be very useful for the application in the environmental bioremediation.