THE EFFECT OF VARIOUS OXIDANTS TO ALUM COAGULATION IN REMOVAL OF NATURAL ORGANIC MATTER IN DRINKING WATER PROCESSESMUHAMMAD FIRDAUS KAMAL, MUKHAMMAD RIFKI HENDIANTO, FAUZUL RIZQA AND EUIS NURUL HIDAYAHAbstract Natural organic matter (NOM) is a complex matrix of organic materials and a key component in aquatic environments. As a result of the interactions between the hydrologic cycle and the biosphere and geosphere, the water sources of drinking water generally contain NOM. The amount, character, and properties of NOM vary considerably according to the origins of the waters and depend on the biogeochemical cycles of their surrounding environments. The presence of NOM reduces the quality of raw water for drinking water by altering its organoleptic properties (color, taste, and odor), disrupting the deposition system and increasing the use of coagulant in drinking water production processes, fouling of membranes, blockages on the filter and distribution of drinking water. The presence of organic compound in raw water for drinking water will affect the disinfection process. The addition of chlorine to the disinfection process cause to disinfection by-product (DBPs) formation, such as trihalomethane and chlorophenol compounds which can lead to cancer. NOM can be eliminated through several methods such as coagulation and advanced oxidation processes. The purpose of this research is to know the effect of various oxidant to alum coagulation in removal of natural organic matter in drinking water processes.
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