Background and purpose: Water treatment using granular activated carbon (GAC) and anthracite improves water quality by reducing turbidity, total organic carbon (TOC), Fe, Mn, NO3-, and NH4+. The present study investigated the operation of two dual media pilot filters de
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Background and purpose: Water treatment using granular activated carbon (GAC) and anthracite improves water quality by reducing turbidity, total organic carbon (TOC), Fe, Mn, NO3-, and NH4+. The present study investigated the operation of two dual media pilot filters designed to remove parametersin Abadan water meant plant. Analysis method: The present study is a quasi-experimental study in which two study units, two granular sand-activated carbon and anthracite-sand filters were constructed. Results: The results show that the GAC-sand pilot filter at a low hydraulic loading rate (HLR=35 m3/m2.d) increased the empty bed contact time (EBCT=20 min) which increased the efficiency of treatment.The maximum efficiency removal of mentioned parameters at hydraulic loading rate GAC-sand pilot filter were 93.73%, 93.70%, 47.91%, 16.92%, 31.95%, and 40.37%, respectively. Conclusion: Breakthrough occurred in the GAC-sand pilot filter at 75 h and low hydraulic loading rate, but occurred sooner for medium and high hydraulic loading rates at 49 and 26 h, respectively. So, the runtime for the anthracite-sand pilot filter at high, medium, and low hydraulic loading rates were 73, 46, and 24 h, respectively.
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