This research work is focusing on the toxicities\nof heavy metals of industrial origin to anaerobic digestion\nof the industrial wastewater. Photobacterium phosphoreum\nT3S was used as an indicator organism. The acute\ntoxicities of heavy metals on P. phosphoreum T3S were\nassessed during 15-min half inhibitory concentration\n(IC50) as indicator at pH 5.5ââ?¬â??6. Toxicity assays involved\nthe assessment of multicomponent mixtures using TU and\nMTI approaches. The results of individual toxicity indicated\nthat the toxicity of Cd, Cu and Pb on P. phosphoreum\nincreased with increasing concentrations and there\nwas a linear correlation. The 15-min IC50 values of Cd, Cu\nand Pb were 0.537, 1.905 and 1.231 mg/L, respectively,\nand their toxic order was Cd[Pb[Cu. The combined\neffects of Cd, Cu and Pb were assayed by equivalent\nconcentration mixing method. The results showed that the\ncombined effects of Cd ? Cu, Cd ? Pb, Cu ? Pb,\nCd ? Cu ? Pb were antagonistic, antagonistic and partly\nadditive. The combined effect of three heavy metals was\npartly additive.
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