REMOVAL OF NATURAL ORGANIC MATTER FROM DRINKING WATER BY HYBRID COAGULATION/ADSORPTION-MEMBRANE FILTRATION

The aim of this study is to determine both the changing value of dissolved organic carbon (DOC) in water samples taken from influent of Kagithane Drinking Water Treatment Plant in Istanbul, and determine the removal efficiency of DOC, by separately applying coagulation, adsorption and membrane filtration methods to obtain the desired limits these methods are capable of producing. In this study, alum and FeCl3 were chosen as the coagulant, and clay as the adsorbent. For membrane filtration, an OF polypropylene (PP) hollow fiber membrane was used. The removal efficiencies of DOC and UV254 were compared using alum and FeCl3 and the results showed that FeCl3 is more effective for removal in comparison to alum. In the adsorption section of the study, removal efficiencies of 30 to 40% were observed. In the membrane filtration section DOC removal efficiency was determined to be 32%. The result of this study showed that applying the coagulation method using FeCl3 is more effective and economical for the removal of organic matters compared to the adsorption and membrane filtration method. Applying both coagulation and membrane filtration methods were shown to be the most effective way for efficient removal of organic matter.