جذب (Cr (VI توسط MLSS.جذب (Cr (VI توسط MLSS در رآکتورهای بسته لجن فعال

ABSTRACT In this research which was performed with bench Scale, Adsorption of Cr(VI) from Industrial wastewater was studied & biological method of Activated sludge batch flow reactors utilized. This study indicated that Cr(VI) at first adsorped with cell walls of bacteria & then after Sedimentation it was intered to sludge & finally was removed from effluent. In this study Cr (VI) adsorption pattern was according to FreundlichIsoterm. The COD of synthetic wastwater was 3000 mg/L & Cr(VI) added to the reactors in three different stages with the Concentration of 5,10& 25mg/L. In the 1st to 3rd stage with 10,8.5 & 9 hrs detention time Cr(VI) adsorption ratio on MLSS was 88%, 70% & 95% respectively. According to the condition of this study Cr(VI) had no toxic effects on Activated sludge microorganisms in the reactors and the rate of microbial synthesis was increased.