STUDI PROSES KOAGULASI AIR BAKU UNTUK AIR BERSIH DI WILAYAH BENCANA PASCA TSUNAMI KABUPATEN ACEH BESAR

Ignasius D.A. Sutapa

Abstract


The coagulation – flocculation process in potable water treatment is very important to be studied in greater detail, since it has a very major impact on subsequent water purification processes and the quality of the water product. Types of coagulant that are commonly used are aluminum sulfate (alum) and poly-aluminum chloride (PAC). The objective of this research was to determine the optimum coagulant type and concentration to be applied for the treatment of surface water in post-tsunami disaster areas. This research is urgently required to design clean water installation in such area. Jar test of coagulants was performed to measure the efficiency of coagulation and sampling interval. From the obtained results, it can be concluded that the raw water turbidity influences the sedimentation time. At turbidity below 15 NTU, the optimum sedimentation time was 5 minutes. At turbidities above 15 NTU, the sedimentation was quicker, namely 1 minute. Based on jar test results on Krueng Raya river water, it can be observed that this river water can be treated with aluminum sulfate coagulant at 20 ppm dose. When PAC coagulant was used, the optimum dose was 15 ppm.

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Jurnal Teknik Kimia Indonesia Asosiasi Pendidikan Tinggi Teknik Kimia Indonesia