PERENCANAAN PENGEMBANGAN INSTALASI PENGOLAHAN AIR BAKU PDAM GIRI TIRTA DI BENDUNG GERAK SEMBAYAT KEC. BUNGAH KAB. GRESIK

Adhinda Dwi Putra Ramadhani, Tri Budi Prayogo, Very Dermawan

Abstract


ABSTRAK: Kebutuhan air sangat penting bagi semua makhluk hidup, salah satunya adalah air permukaan.
Air permukaan tidak bisa langsung di konsumsi tetapi harus melalui pengolahan terlebih dahulu. Salah satu
instalasi pengolahan air baku di PDAM Giri Tirta Kabupaten Gresik saat ini yang berada di Legundi dan
Krikilan Kecamatan Driyorejo kapasitas sudah maksimal dan hanya bisa melayani 11 kecamatan. Saat ini di
Kabupaten Gresik ada 5 kecamatan yang belum terlayani oleh PDAM Gresik, yaitu Kec. Bungah, Sidayu,
Panceng, Dukun dan Ujungpangkah. Oleh karena itu perlu adanya pengembangan baru untuk peningkatan
kapasitas. PDAM Gresik merencanakan pengembangan instalasi pengolahan air pada kecamatan bungah
tepatnya berada pada Bendung Gerak Sembayat. Pada perhitungan studi ini didapatkan kebutuhan air sebesar
840 liter/detik dan kapasitas pengolahan sebesar 924 liter/detik pada tahun 2036. Air baku berasal dari sungai
Bengawan Solo bagian hilir. Sistem pengaliran air dari intake ke proses pengolahan dilakukan dengan bantuan
pompa. Perencanaan yang akan digunakan adalah bak pengumpul, aerasi, koagulasi, flokulasi, flotasi,
sedimentasi, filtasi. Perencanaan ini dilengkapi dengan rumah pembubuh tawas, kaporit, kapur serta saluran
penguras dan bak sirkulasi.
Kata kunci: Instalasi pengolahan air, Bak unit, Batas baku mutu kualitas air.
Abstract : The needs water are very important for all living creatures, which one of them is surface water.
Surface water can not be consumed directly, it must be processed first. One of the water treatment plants in
PDAM Giri Tirta Gresik regency that located in Legundi and Krikilan, Driyorejo district, has a maximum
capacity and can only serve 11 districts. Currently in Gresik regency there are 5 districts that have not been
served by PDAM Gresik, such as Bungah, Sidayu, Panceng, Dukun, and Ujungpangkah. Therefore, there is a
need for new development to increase capacity. PDAM Gresik is planning the development of water treatment
plant in Bungah sub-district, located at Sembayat Barrage. In this study obtained the water requirement is 840
l/s and processing capacity is 924 l/s in 2036. The sources of raw water us from the downstream of Bengawan
Solo river. The water instalation system is consist of sluice gate as intake and pump to deliver water from
intake to water treatment plant. Planning of water treatment consist of tub reservoir, aeration, coagulation,
flocculation, flotation, sedimentation, and filtration. This plan is equipped with alum house, chlorine, lime, and
drainage and circulation tub.
Keywords: Water treatment plant, Tub unit, Water quality standard limit

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