ANALISIS KUALITAS SUMBER-SUMBER AIR UNTUK PENGELOLAAN PEMENUHAN KEBUTUHAN AIR BERSIH DI PULAU KECIL (STUDI KASUS: PULAU MERBAU)

Abstract

This research was conducted with the aim to find out the quality of water from several raw water sources that will be used as clean water sources. Raw water sources that do not meet clean water quality standards will be used as a basis for taking alternative water treatment methods so that the quality of clean water is obtained in accordance with the standards. The selection of water sources and treatment methods is also based on the socio-economic conditions of the Merbau Island community. The results of testing several sources of raw water obtained that the overall quality of rainwater meets clean water standards only the degree of acidity (pH) of rainwater (5.6) is still below the neutral pH standard. Whereas water sources from groundwater have several elements / substances that do not meet clean water standards including zinc (Zn) dissolved, dissolved iron (Fe) and KMnO4. Surface water in the Merbau Island region is categorized as brackish / peat water and has characteristics that do not meet clean water quality including color, turbidity, DHL, pH and organic matter (KMnO4) as well as iron and manganese. From the test results it is proposed that water treatment for rainwater sources is a slow sand filtratin system. Water Treatment with an Up-flow Slow Sand Filtration System and down-flow Slow Sand Filtration System from a grond water Source. As for water that comes from surface water is also categorized as peat water which has the characteristics of color, turbidity, organic matter and high cations and has a low pH, so it is recommended to use a conventional system with several stages of the process including oxidation, adsorption process, coagulation - flocculation processes and electrocoagulation processes. By looking at the current socio-economic conditions of the Merbau Island community, it is proposed that rainwater sources use a treatment system or without treatment, rain water is suitable for use as a source of clean water.