Abstract
Removal of lead (Pb) from sewage water by phytorid sewage treatment plant was studied at Agriculture College, Maharajbag, Nagpur to examine the efficacy of the phytorid sewage treatment plant in Pb removal from the sewage water, and to determine the optimum condition using response surface methodology. A Box-Behnken model was employed as an experimental design. The effect of three independent variables hydraulic loading or flow (50 - 150 m3 .d-1), dilution (10 - 80 %) and spatial length (16 - 100 %) was studied on Pb removal from the sewage water in bench mode of the experiment. The optimal conditions of Pb removal were found to be flow of 86 m3 .d-1, dilution of 78% and spatial length of 55 per cent. Under these experimental conditions, the experimental Pb removal obtained was 0.0035 mg.l-1. The proposed model equation using the RSM showed good agreement with the experimental data, with a coefficient of determination (R2 ) of 98.30 per cent. The result showed that optimised condition could be used for the efficient removal of the Pb from the sewage water.
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