ارزیابی کارایی صافی های دو لایه ای در بهبود کیفیت آب در تصفیه خانه ی شهر آبادان

Abstract Introduction: Nowadays, the greatest of process type used in treatment of beverage water is conventional treatment. That it cannot remove organic matter effectively. Filtration is one of the most important treatment processes used in water treatment plant.The one of approaches, modification of conventional rapid sand filters into dual or multimedia filters. Methods: This study was results from of pilot study that with the purpose of assessment performance was using of GAC and Anthracite in dual media filter filters in Abadan water treatment plant in removal of TOC, Fe, Mn, No3-and NH4+ in Drinking Water by GAC and Anthracite in dual - media filters in Abadan water treatment plant. All parameters were measured according to sections of Standard Methods APHA et al. The t-test and regression equations were calculated. Results: Samples were collected in summer from the inlet and outlet of each pilot filter and the outlet of the filtration unit. Turbidity, Total Organic Carbon (TOC), Fe, Mn, NO3- and NH4+ were measured in each sample for three different low, medium, and high filtration rates. Pilot No.2 had a maximum efficiency in the removal of the parameters that removal average of turbidity, TOC, Fe, Mn, NO3-, NH4+, respectively. So, the best performance of GAC-sand filter is in EBCT=20 min during loading rate of 35 l/d. Conclusion: In general, both pilot filters performed better at low surface loading rate. More specifically, pilot scale No. 2 showed better removal of parameters and longer empty bed contact time (EBCT) in that surface loading rate.