Pengaruh Preozonasi Terhadap Proses Koagulasi-flokulasi dan Disinfeksi di Instalasi Pengolahan Air Minum (IPAM) Ngagel I Kota Surabaya

Saud, Muhamad Nur Ibnu Luthfi (2023) Pengaruh Preozonasi Terhadap Proses Koagulasi-flokulasi dan Disinfeksi di Instalasi Pengolahan Air Minum (IPAM) Ngagel I Kota Surabaya. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses pengolahan air baku melalui Instalasi Pengolahan Air Minum (IPAM) umumnya masih bergantung pada metode konvensional. Beberapa proses dimaksud berupa koagulasi-flokulasi (memisahkan padatan terlarut) dan klorinasi (untuk disinfeksi). Penggunaan bahan kimia (koagulan dan disinfektan) terkadang perlu ditambahkan berlebih, namun tentu dapat mempengaruhi biaya operasional, pembentukan hasil samping (senyawa toxic), serta terhadap kesehatan jika terakumulasi dalam tubuh makhluk hidup. Salah satu upaya untuk menyelesaikan persoalan tersebut adalah dengan menambahkan preoksidasi. Preoksidasi menggunakan gas ozon disebut sebagai preozonasi. Gas ozon (O3) bersifat reaktif (oksidator yang baik) dan lebih kuat dari klorin, sehingga dapat mengurangi disinfektan (klorin) dan kebutuhan koagulan (alum) melalui proses oksidasi. Mengacu dari hal tersebut, maka penelitian ini bertujuan untuk mengetahui pengaruh preozonasi terhadap proses koagulasi-flokulasi dan disinfeksi. Metode penelitian adalah dengan menambahkan gas ozon sebelum (preozonasi) proses koagulasi-flokulasi dan disinfeksi. Preozonasi dilakukan dengan variasi laju alir (1 L/menit, 2 L/menit, dan 3 L/menit) dan waktu kontak gas ozon (10 menit, 20 menit, dan 30 menit). Hasil penelitian mendapatkan bahwa kondisi optimum dicapai cukup dengan menggunakan laju alir 2,2 L/menit dan waktu kontak 12 menit yang ditambahkan koagulan 40 mg/L dan klorin 45 mg/L. Variasi tersebut mampu menurunkan kebutuhan koagulan sebanyak 15% (7 mg/L) dan klorin 6% (3 mg/L), serta penyisihan parameter kekeruhan 46% (37 NTU), warna 29% (5,2 PtCo), TSS 48% (39 mg/L), COD 36% (3,4 mg/L), serta amonia 95% (0,6 mg/L). Kesimpulan penelitian ini bahwa penambahan preozonasi di IPAM Ngangel I dapat mengurangi kebutuhan bahan kimia (koagulan dan klorin) dan menyisihkan polutan (warna, kekeruhan, TSS, COD, dan amonia), serta biaya bahan kimia jika ditinjau dari aspek ekonomi.
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The raw water treatment process through the Drinking Water Treatment Plants (DWTPs) generally still relies on conventional methods. Some of the processes referred to coagulation-flocculation (to separate dissolved solids) and chlorination (for disinfection). The use of chemicals (coagulants and disinfectants) sometimes needs to be added excessively, but also can certainly affect operational costs, the formation of by-products (toxic compounds), as well as health if they accumulate in living things. One of the solutions to solve this problem is by adding preoxidation. Preoxidation using ozone gas is known as preozonation. Ozone gas (O3) is reactive (good oxidizing agent) and stronger than chlorine, so it can reduce the need for disinfectants (chlorine) and coagulants (alum) through the oxidation process. Referring to this, this study aims to determine the effect of preozonation on coagulation-flocculation and disinfection processes. The research method is by adding ozone gas before (preozonation) the coagulation-flocculation and disinfection. Preozonation was carried out with variations in flow rate (1 L/min, 2 L/min, and 3 L/min) and ozone gas contact time (10 minutes, 20 minutes, and 30 minutes). The results showed that the optimum conditions were achieved simply by using a flow rate of 2.2 L/minute and a contact time of 12 minutes with the addition of 40 mg/L coagulant and 45 mg/L chlorine. These variations were able to reduce 15% (7 mg/L) of coagulant and 6% (3 mg/L) of chlorine and also the parameters turbidity 46% (37 NTU), color 29% (5,2 PtCo), TSS 48% (39 mg/L), COD 36% (3,4 mg/L), and ammonia 95% (0,6 mg/L). The conclusions of this study is that the addition of preozonation in Ngangel I DWTP can reduce the need for chemicals (coagulants and chlorine) and remove pollutants (color, turbidity, TSS, COD, and ammonia), as well as the chemical costs from an economic perspective.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	air baku, disinfeksi, flokulasi, koagulasi, preozonasi
Subjects:	Q Science > QD Chemistry > QD547 Flocculation, precipitation, adsorption, etc. T Technology > TD Environmental technology. Sanitary engineering > TD259.2 Drinking water. Water quality T Technology > TD Environmental technology. Sanitary engineering > TD433 Water treatment plants T Technology > TD Environmental technology. Sanitary engineering > TD455 Chemical precipitation. Coagulation. Flocculation. Water--Purification--Flocculation.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25101-(S2) Master Thesis
Depositing User:	Muhamad nur ibnu luthfi saud
Date Deposited:	04 Aug 2023 06:14
Last Modified:	05 Aug 2023 01:25
URI:	http://repository.its.ac.id/id/eprint/101872

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