<![CDATA[Natural resources on Earth consist of abiotics and biotics. Water, including biotic natural resources is one of the most important elements in supporting the survival of human life. One of water source which was widely used by resident around the Yogyakarta State University was the water of Institute of Development and Quality of Education Assurance (Lembaga Pengembang dan Penjamin Mutu Pendidikan) of Yogyakarta State University. This water resource was used to fulfill the needs of employees, the institute visitors, and traders around Karangmalang Culinary Park. However, the prior observation showed that the color of the water was prone to muddy and contains many sediments substances. This research was aimed to filter the water of that institute into pure water according to the physics parameter. This research was conducted by utilizing biomass waste in the form of teak, husk, and coconut fiber to be processed into active charcoal which later used to filter the water. Additional materials used in this research were sand and gravel. The result of water’s total dissolve solid (TDS) has decreased by using the three active charcoal of biomass waste. Among those activated charcoal, the carbon which formed by teak showed the most significant result. Furthermore, in Fe content test, the most significant result of decreasing Fe content was showed by activated charcoal from husk base material. It can be concluded that the most effective activated charcoal material was formed by teak biomass waste which has a large pore structure.Keywords: active charcoal, biomass waste, filtration.]]>
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