Alfianita, Julia (2025) Kemampuan Membran Nanofiltrasi dalam Pengolahan Air Minum (Studi Kasus: Air Kali Jagir Surabaya). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kali Jagir merupakan salah satu anak Sungai Brantas, memiliki peran penting sebagai sumber air baku untuk PDAM Surya Sembada Kota Surabaya. Lokasi di hilir Sungai Brantas membuat Kali Jagir menjadi tempat akumulasi bahan pencemar yang berasal dari segmen hulu dan tengah. Aktivitas manusia di sepanjang Sungai Jagir yang meliputi sektor domestik dan industri turut menyumbang bahan pencemar yang mengakibatkan parameter seperti Kekeruhan, TDS, TOC, dan Total Coliform memiliki konsentrasi yang tinggi. Penelitian ini bertujuan untuk menganalisis kinerja membran nanofiltrasi dan menganalisis pengaruh operational time, penggunaan filter pasir sebagai pretreatment,perbedaan recovery rate dan jenis membran nanofiltrasi pada rangkaian teknologi membran nanofiltrasi dalam menurunkan parameter Kekeruhan, TDS, TOC, dan Total Coliform pada pengolahan air minum. Air baku diolah terlebih dahulu diolah menggunakan koagulan Al₂(SO₄)₃ yang kemudian diumpankan menuju filter pasir dengan kecepatan filtrasi 0,4 m/jam sebagai pretreatment sebelum diolah menggunakan membran nanofiltrasi. Membran nanofiltrasi yang digunakan yaitu dengan recovery rate 30% dan 60%. Jenis membran yang digunakan adalah NF30-2514 dan NF90-2514. Rangkaian reaktor dioperasikan secara intermittent selama 10 hari dengan tekanan 60 psi. Analisis pengujian sampel pada parameter Kekeruhan, TDS, TOC, dan Total Coliform berdasarkan Permenkes RI No. 02 Tahun 2023. Hasil diperoleh pada pengolahan membran nanofiltrasi dengan variasi pretreatment filter pasir, recovery rate, dan perbedaan jenis membran memberikan pengaruh pada efektivitas penyisihan parameter kekeruhan, TDS, TOC, dan Total Coliform. Unit pengolahan membran nanofiltrasi menggunakan pretreatment dengan recovery rate 60% pada Membran NF90-2514 menunjukkan kinerja tertinggi dengan rejection rate rata-rata sebesar 83,58% untuk kekeruhan (outlet: 0,46 NTU), 69,65% untuk TDS (outlet: 118,5 mg/L), 51,18% untuk TOC (outlet: 3,08 mg/L), dan 100% untuk Total Coliform (outlet: 0 MPN/100 mL). Sementara itu, variasi terbaik dari kelompok tanpa filter pasir yaitu dengan recovery rate 60% dan Membran NF90-2514, dengan rejection rate rata-rata pada kekeruhan 82,06% (outlet: 0,94 NTU), TDS 65,76% (outlet: 155,50 mg/L), Total Coliform 99,14% (outlet: 7,50 MPN/100 mL), dan penyisihan TOC 35,86% (outlet: 5,54 mg/L).
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The Kali Jagir is one of the tributaries of the Sungai Brantas, playing a crucial role as a raw water source for PDAM Surya Sembada in Surabaya. Its downstream location within the Sungai Brantas makes the Kali Jagir a site for the accumulation of pollutants originating from upstream and midstream segmentsHuman activities along the Kali Jagir, including domestic and industrial sectorscontribute to pollutant loads, leading to high concentrations of parameters such as Turbidity, TDS, TOC, and Total Coliform. This study aims to analyze the performance of nanofiltration membranes and examine the effects of operational time, the use of sand filter as pretreatment, variations in recovery rates, and different types of nanofiltration membranes within the nanofiltration membrane technology system in reducing Turbidity, TDS, TOC, and Total Coliform parameters in drinking water treatment. The raw water is pretreated using Al₂(SO₄)₃ coagulant before being fed into a sand filter (slow sand filter) with a filtration rate of 0.4 m/h as a pretreatment stage before undergoing nanofiltration membrane treatment. The nanofiltration membranes used have recovery rates of 30% and 60%. The membrane types applied are NF30-2514 and NF90-2514. The reactor system operates intermittently for 10 days under a pressure of 60 psi. Sample analysis for Turbidity, TDS, TOC, and Total Coliform parameters follows the Indonesian Ministry of Health Regulation No. 02 of 2023. The results obtained from nanofiltration membrane treatment with variations in sand filter pretreatment, recovery rates, and membrane types showed significant effects on the removal efficiency of turbidity, TDS, TOC, and Total Coliform parameters. The nanofiltration membrane unit utilizing sand filter pretreatment and operating at a 60% recovery rate with the NF90-2514 membrane demonstrated the highest performance, achieving average rejection rates of 83.58% for turbidity (outlet: 0.46 NTU), 69.65% for TDS (outlet: 118.5 mg/L), 51.18% for TOC (outlet: 3.08 mg/L), and 100% for Total Coliform (outlet: 0 MPN/100 mL)Meanwhile, the best performance among the group without sand filter pretreatment was also achieved at a 60% recovery rate using the NF90-2514 membrane, with average rejection rates of 82.06% for turbidity (outlet: 0.94 NTU), 65.76% for TDS (outlet: 155.50 mg/L), 99.14% for Total Coliform (outlet: 7.50 MPN/100 mL), and 35.86% for TOC (outlet: 5.54 mg/L).
Key words: nanofiltration, recovery rate, rejection rate, sand filter
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Kata kunci: Filter Pasir, membran nanofiltrasi, recovery rate, rejection rate. Key words: nanofiltration, recovery rate, rejection rate, sand filter |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering 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: | Julia Alfianita |
| Date Deposited: | 21 Jul 2025 02:06 |
| Last Modified: | 21 Jul 2025 02:06 |
| URI: | http://repository.its.ac.id/id/eprint/120118 |
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