Abstract:
This work was carried out to treat wastewater from alcohol plant by nano-Fe and modified nano-Fe. The investigated parameters for the system treated by the nano-Fe were number of dilution, initial pH of wastewater, shaking rate, ratio of nano-Fe to volume of wastewater whereas the explored parameters for the system treated by the modified nano-Fe were type and quantity of supporter and quantity of the secondary metal (Pd). The preliminary results indicated that the treatment efficiency increased with the increase of dilution time and ratio of nano-Fe0 to volume of wastewater and the decrease of initial pH of wastewater while the shaking speed had slightly effect on the removal efficiency of color, COD and BOD. The utilization of chitosan as a supporter provided the better performance than that of silica and the addition of Pd slightly promoted the treatment efficiency. Comparison between the treatment efficiency of nano-Fe[superscript o] and modified nano-Fe, the modified nano-Fe, nano-Fe on 0.1 g chitosan, was suitable for treating wastewater from alcohol plant. At optimum condition, dilution 50 times, initial pH 3, shaking rate 170 rpm, ratio of nano-Fe to volume of wastewater 12.5 g/l, approximately 93.9 90.5 and 60.8 of color, COD and BOD was decreased within 6 hr reaction time. The reduction rate of color, COD and COD followed the first order reaction with the rate constant of 0.85 0.76 and 0.57 hr-1, respectively.