Pengaruh Ketebalan Media dan Rate filtrasi pada Sand Filter dalam Menurunkan Kekeruhan dan Total Coliform
Submission Date: 2014-08-11 11:49:58
Accepted Date: 2014-09-14 00:00:00
Abstract
Pada penelitian ini dilakukan proses filtrasi dengan menggunakan sand filter sebagai salah satu metode dalam pengolahan air bersih. Pada sand filter proses penyaringan terjadi pada media filter yang sangat halus, seperti media filter pada unit slow sand filter. Kecepatan penyaringan yang diinginkan pada sand filter ini adalah kecepatan seperti pada unit rapid sand filter. Sehingga sand filter ini adalah penggabungan antara kelebihan yang dimiliki slow sand filter dan rapid sand filter. Variasi pada penelitian ini yaitu: tebal media pasir 80 cm dengan rate filtrasi 5 m3/m2.jam, tebal media pasir 80 cm dengan rate filtrasi 7,5 m3/m2.jam, tebal media pasir 100 cm dengan rate filtrasi 5 m3/m2.jam, tebal media pasir 100 cm dengan rate filtrasi 7,5 m3/m2.jam, tebal media pasir 120 cm dengan rate filtrasi 5 m3/m2.jam dan tebal media pasir 120 cm dengan rate filtrasi 7,5 m3/m2.jam. Pada penelitian ini digunakan air baku yaitu air Kali Surabaya dengan nilai rata-rata total coliform 90.000 per 100 ml sampel dan nilai rata-rata kekeruhan 87,4 NTU. Dihasilkan bahwa penyisihan total coliform pada variasi tebal media 120 cm dan rate filtrasi 5 m3/m2/jam dengan nilai efisiensi sebesar 99% dan kekeruhan paling baik terjadi pada variasi panjang variasi tebal media 100 cm dan rate filtrasi 5 m3/m2/jam dengan nilai efisiensi sebesar 98,27%.
Keywords
sand filter, slow sand filter, rapid sand filter, total coliform, kekeruhan, tebal media, rate filtrasi
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