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

Authors

  • تقوی, دکتر کامران استادیار گروه مهندسی بهداشت محیط آموزشکده بهداشت دانشگاه علوم پزشکی و خدمات بهداشتی درمانی گیلان
  • مصداقی نیا, دکتر علیرضا استاد گروه مهندسی بهداشت محیط دانشگاه علوم پزشکی و خدمات بهداشتی درمانی تهران
Abstract:

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.

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volume 8  issue 29

pages  8- 15

publication date 2000-03

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