Open AccessStudi proses koagulasi air baku untuk air bersih di wilayah bencana pasca tsunami kabupaten aceh besar
Author(s) -
Ignasius D.A. Sutapa
Publication year - 2018
Publication title -
jurnal teknik kimia indonesia
Language(s) - English
Resource type - Journals
eISSN - 2686-4991
pISSN - 1693-9433
DOI - 10.5614/jtki.2009.8.1.3
Subject(s) - alum , turbidity , raw water , flocculation , coagulation , environmental science , sedimentation , environmental engineering , sulfate , water quality , water treatment , pulp and paper industry , chloride , waste management , chemistry , sediment , engineering , geology , psychiatry , biology , psychology , paleontology , ecology , oceanography , organic chemistry
Study on raw water coagulation process for potable water production in the post-tsunami disaster areas district aceh besarThe 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.Keyword: coagulant, efficiency, coagulation, water quality.AbstrakProses koagulasi flokulasi dalam pengolahan air minum sangat penting untuk ditinjau lebih jauh karena mempunyai pengaruh yang sangat besar terhadap proses purifikasi air berikutnya dan kualitas air produksi. Jenis koagulan yang sering dipakai adalah alumunium sulfat (alum) dan poly alumunium chloride (PAC). Tujuan penelitian ini adalah untuk menentukan tipe dan konsentrasi optimal koagulan yang diaplikasikan pada air baku berupa air permukaan di wilayah bencana pasca tsunami. Hal ini sangat diperlukan untuk membuat perencanaan rancangan instalasi pengolahan air bersih di wilayah tersebut. Jar test koagulan dilakukan untuk menentukan efisiensi koagulasi dan waktu sampling. Dari hasil penelitian ini dapat disimpulkan kekeruhan air baku mempengaruhi waktu sedimentasi. Pada kekeruhan di bawah 15 Nephelometric Turbidity Unit (NTU), waktu optimum sedimentasi adalah lima menit, tetapi pada air baku yang kekeruhannya di atas 15 NTU, waktu sedimentasi lebih cepat yaitu satu menit saja. Dari hasil jar tes yang dilakukan terhadap air di sungai Krueng Raya dapat dilihat bahwa air sungai Krueng Raya dapat diolah dengan bahan koagulan aluminium sulfat pada dosis 20 ppm, sedangkan jika menggunakan bahan koagulan PAC memerlukan dosis optimal 15 ppm.Kata kunci : koagulan, efisiensi, koagulasi, kualitas air