Wijaya, Ade Indah Ayu Pratiwi (2025) Penggunaan Gelombang Ultrasonik Sebagai Alternatif Desinfeksi. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kualitas air memainkan peran penting dalam mendukung kesehatan masyarakat dan keberlanjutan lingkungan. Salah satu indikator kualitas air adalah keberadaan mikroorganisme patogen seperti Escherichia coli yang dapat membahayakan kesehatan manusia. Penelitian ini bertujuan untuk mengevaluasi efektivitas gelombang ultrasonik frekuensi 40 kHz dalam menurunkan konsentrasi Escherichia coli pada air sumur dan efluen instalasi pengolahan air limbah (IPAL) domestik.
Penelitian dilakukan menggunakan dua jenis alat ultrasonik, yaitu alat rakitan (U1) dan alat komersial (U2), dengan durasi perlakuan selama 60 dan 120 menit. Parameter yang diamati meliputi konsentrasi Escherichia coli menggunakan metode Most Probable Number (MPN), suhu, dan pH selama perlakuan.
Hasil menunjukkan bahwa pada air sumur, konsentrasi Escherichia coli menurun dari 2 × 10⁴ menjadi 2 × 10³ MPN/100 mL (U1) dan 3 × 10³ MPN/100 mL (U2) setelah 120 menit. Pada efluen IPAL domestik, konsentrasi menurun dari 6 × 10⁶ menjadi 1,5 × 10⁶ MPN/100 mL (U1) dan 2 × 10⁶ MPN/100 mL (U2). Suhu berkisar antara 29,8–31,2 °C dan pH tetap netral (6,9–7,3), tanpa perubahan signifikan. Meskipun perlakuan ultrasonik mampu menurunkan jumlah Escherichia coli, hasil yang diperoleh tidak memenuhi standar baku mutu air bersih menurut Permenkes Nomor 2 Tahun 2023, yaitu 0 MPN/100 mL. Oleh karena itu, teknologi ini dinilai lebih efektif sebagai metode pendukung dalam menjaga kualitas air selama proses penyimpanan dan distribusi, guna meminimalkan risiko kontaminasi ulang oleh mikroorganisme patogen.
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Water quality plays an important role in supporting public health and environmental sustainability. One indicator of water quality is the presence of pathogenic microorganisms such as Escherichia coli, which can be harmful to human health. This study aims to evaluate the effectiveness of 40 kHz ultrasonic waves in reducing Escherichia coli concentration in well water and domestic wastewater treatment plant (WWTP) effluent.
The study was conducted using two types of ultrasonic devices, namely an assembled device (U1) and a commercial device (U2), with treatment durations of 60 and 120 minutes. Parameters observed included Escherichia coli concentration using the Most Probable Number (MPN method), temperature, and pH during the treatment.
Results showed that in well water, E. coli concentration decreased from 2 × 10⁴ to 2 × 10³ MPN/100 mL (U1) and 3 × 10³ MPN/100 mL (U2) after 120 minutes. In the domestic WWTP effluent, the concentration decreased from 6 × 10⁶ to 1.5 × 10⁶ MPN/100 mL (U1) and 2 × 10⁶ MPN/100 mL (U2). Temperature ranged from 29.8-31.2 °C and pH remained neutral (6.9-7.3), with no significant changes. Although ultrasonic treatment was able to reduce the number of Escherichia coli, the results obtained did not meet the quality standard of clean water according to Permenkes No. 2 of 2023, which is 0 MPN/100 mL. Therefore, this technology is considered more effective as a supporting method in maintaining water quality during the storage and distribution process, to minimize the risk of recontamination by pathogenic microorganisms.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Gelombang ultrasonik, pengolahan air, Mikroorganisme, Desinfeksi, Metode Most Probable Number (MPN), Ultrasonic waves, Water treatment, Microorganism, Disinfection, Most Probable Number (MPN) |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD430 Water--Purification. |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Environmental Engineering > 25201-(S1) Undergraduate Theses |
| Depositing User: | Ade Indah Ayu Pratiwi Wijaya |
| Date Deposited: | 25 Jul 2025 03:56 |
| Last Modified: | 25 Jul 2025 03:56 |
| URI: | http://repository.its.ac.id/id/eprint/121571 |
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