Analisis Pengaruh Penerapan Elektrokoagulasi sebagai Pretreatment terhadap Kualitas Air Hasil Desalinasi pada Sistem Reverse Osmosis

Wijaya, Tiar Kusuma (2026) Analisis Pengaruh Penerapan Elektrokoagulasi sebagai Pretreatment terhadap Kualitas Air Hasil Desalinasi pada Sistem Reverse Osmosis. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5019221097-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (2MB) | Request a copy

Abstract

Ketersediaan air bersih yang semakin terbatas mendorong pengembangan teknologi desalinasi, salah satunya Reverse osmosis (RO). Kinerja membran RO sangat dipengaruhi oleh kualitas air umpan sehingga diperlukan proses pretreatment untuk mengurangi kontaminan sebelum air memasuki membran. Salah satu metode pretreatment adalah elektrokoagulasi, yaitu proses pengolahan air dengan arus listrik dan elektroda logam untuk menghasilkan koagulan yang mengikat serta mengendapkan partikel pencemar. Penelitian ini bertujuan menganalisis pengaruh penerapan pretreatment elektrokoagulasi terhadap kualitas air hasil desalinasi pada sistem reverse osmosis. Variasi percobaan yang digunakan yaitu tanpa pretreatment, pretreatment elektrokoagulasi selama 10 menit, dan 20 menit. Hasil penelitian menunjukkan bahwa penerapan pretreatment elektrokoagulasi mampu meningkatkan kinerja sistem reverse osmosis dalam menyisihkan kontaminan. Peningkatan waktu pretreatment dari 10 menit menjadi 20 menit menurunkan rata-rata TDS air pretreatment dari 112 ppm menjadi 68,3 ppm dan 58 ppm, dengan efisiensi meningkat dari 89,13% menjadi 93,37% dan 94,34%. Rata-rata salinitas air pretreatment juga menurun dari 106,67 ppm menjadi 59,33 ppm dan 56,00 ppm, dengan efisiensi meningkat dari 89,44% menjadi 94,13% dan 94,46%. Nilai pH meningkat dari 6,97 menjadi 8,64 dan 8,91 setelah proses elektrokoagulasi, kemudian sedikit menurun setelah reverse osmosis menjadi 8,50 dan 8,73. Selain itu, pretreatment elektrokoagulasi meningkatkan debit air pretreatment dari 0,071–0,079 L/menit menjadi 0,080–0,089 L/menit pada pretreatment 10 menit dan 0,103–0,109 L/menit pada pretreatment 20 menit. Pengujian kualitas air pada variasi pretreatment 20 menit menunjukkan bahwa sebagian besar parameter telah memenuhi baku mutu. Namun, parameter pH, aluminium, Total Coliform, dan Escherichia coli masih belum memenuhi baku mutu. Dengan demikian, pretreatment elektrokoagulasi selama 20 menit merupakan kondisi terbaik dalam penelitian ini karena mampu meningkatkan kinerja reverse osmosis dalam menghasilkan air dengan kualitas yang lebih baik. Namun diperlukan penyesuaian pH, penurunan residu aluminium, dan proses desinfeksi agar air hasil desalinasi memenuhi seluruh persyaratan baku mutu
=======================================================================================================================================
The increasingly limited availability of clean water has encouraged the development of desalination technology, one of which is Reverse osmosis (RO). The performance of RO membrane is highly influenced by the quality of feed water; therefore, a pretreatment process is required to reduce contaminants before the water enters the membrane. One of the pretreatment methods is electrocoagulation, which is a water treatment process that utilizes electric current and metal electrodes to produce coagulants that bind and precipitate contaminant particles. This study aims to analyze the effect of applying electrocoagulation pretreatment on the quality of desalinated water produced by a reverse osmosis system. The experimental variations used were without pretreatment, 10 minutes of electrocoagulation pretreatment, and 20 minutes of electrocoagulation pretreatment. The results showed that the application of electrocoagulation pretreatment improved the performance of the reverse osmosis system in removing contaminants. Increasing the pretreatment time from 10 minutes to 20 minutes reduced the average pretreatmente water TDS from 112 ppm to 68.3 ppm and 58 ppm, with the removal efficiency increasing from 89.13% to 93.37% and 94.34%, respectively. The average pretreatmente water salinity also decreased from 106.67 ppm to 59.33 ppm and 56.00 ppm, with the removal efficiency increasing from 89.44% to 94.13% and 94.46%, respectively. The pH value increased from 6.97 to 8.64 and 8.91 after the electrocoagulation process, then slightly decreased after reverse osmosis to 8.50 and 8.73. In addition, electrocoagulation pretreatment increased the pretreatmente water flow rate from 0.071–0.079 L/min to 0.080–0.089 L/min for the 10-minute pretreatment and 0.103–0.109 L/min for the 20-minute pretreatment. Water quality testing of the 20-minute pretreatment variation showed that most parameters met the water quality standards. However, the pH, aluminum, Total Coliform, and Escherichia coli parameters still did not meet the water quality standards. Therefore, 20 minutes of electrocoagulation pretreatment was the best condition in this study because it improved the performance of the reverse osmosis system in producing water of better quality. However, pH adjustment, reduction of residual aluminum, and a disinfection process are still required to ensure that the desalinated water meets all applicable water quality standards.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Desalinasi, Elektrokoagulasi, Kualitas Air, Pretreatment, Reverse osmosis===================================================== Electrocoagulation, Desalination, Pretreatment, Reverse osmosis, Water Quality.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Tiar Kusuma Wijaya
Date Deposited:	04 Aug 2026 01:50
Last Modified:	04 Aug 2026 01:50
URI:	http://repository.its.ac.id/id/eprint/142458

Actions (login required)

View Item