Overnight inoculum of cadmium resistant bacterial strains, including Micrococcus sp. (MU1) and Arthrobacter sp. (TM6). Were cultured in LB broth to give an initial cell concentration at OD600~0.2 and incubated at 28°C, 150 rpm for 4 h. Cell density was measured using spectrophotometer at OD600. Then, cells bacteria was enumerated by spreading on LB agar plate. All plates were incubated at 30C for 24-48 h until bacteria colony appearance. After that, a number of bacterial colonies were counted and calculated in colony-forming unit (CFU)/mL. The viable cells of Micrococcus sp. (MU1) and Arthrobacter sp. (TM6).