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All Journal Jurnal Teknik Sipil IJOCE (International Journal of Offshore and Coastal Engineering) Jurnal Teknologi Lingkungan Lahan Basah
Arfena Deah Lestari
Universitas Tanjungpura
Civil Engineering, Building, Construction & Architecture Energy Engineering Environmental Science Immunology & microbiology Public Health

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Desalinasi Air Laut Menggunakan Metode Reverse Osmosis (Ro) Dengan Variasi Tekanan Pompa Dendi Dicky Yhavez; M Meddy Danial; Arfena Deah Lestari
Jurnal Teknologi Lingkungan Lahan Basah Vol 12, No 2 (2024): April 2024
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v12i2.76498

Abstract

Air merupakan kebutuhan utama manusia dalam aktivitas sehari-hari. Air laut (air asin) yang berlimpah di sekeliling masyarakat pesisir sulit untuk dimanfaatkan secara langsung karena mengandung garam mineral yang tinggi. Agar dapat digunakan, maka air tersebut harus didesalinasi sehingga layak. Salah satu metode untuk desalinasi adalah Reverse Osmosis (RO). Tujuan penelitian ini untuk mengetahui proses dan tingkat efektivitas metode RO dengan variasi tekanan pompa. Pengujian sampel dilakukan dengan pengujian kadar TDS, pH, salinitas, Fe, dan Mangan. Analisis data yang digunakan berupa analisis analitik dengan 2 variasi tekanan pompa yaitu Single Pump dan Double Pump. Hasil analisis menunjukkan bahwa proses desalinasi menggunakan metode RO memiliki 4 proses. Proses tersebut antara lain pre-treatment, pemberian tekanan, separasi membran dan stabilisasi. Pengolahan menggunakan metode RO pada variasi tekanan Single Pump dengan membran tipe BW (Brackish Water) memiliki nilai efektivitas penurunan parameter salinitas dan TDS sebesar 35,00%, dan 28,89%, sementara pada membran tipe SW (Saline Water) sebesar 95,00%, dan 69,01%. Selanjutnya pengolahan RO pada variasi tekanan Double Pump dengan membran tipe BW memiliki nilai efektivitas penurunan parameter salinitas dan TDS sebesar 35,00% dan 22,09%, sementara pada membran tipe SW sebesar 95,00% dan 72,21%.
Design and Construction of Flap Type Wave Maker Using Servo-Motor Equipped with The Reducer for Generating Waves in 3-D Wave Tank Mochammad Meddy Danial; Seno Darmawan Panjaitan; Arfena Deah Lestari; Jasisca Meirany; Teguh Suratman; Muhammad Abqari
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 2 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i2.19330

Abstract

Laboratory physical models in ocean engineering field are beneficial methods to conduct various research experiments. One of the most important equipment in the ocean engineering laboratory is a wave maker to generate and mimic the actual ocean wave. This research aims to design and construct a wave maker to generate waves on the wave tank with the dimensions of 7.5 m x 15 m x 1 m. The selected type of wave maker is a flap with hinged at the bottom, which is driven by a 3-phase motor 5 HP and gearbox reducer WPA 80 with a ratio of 1:40. The flap was connected to pulley B1-12 by shaft. There are three designs of wave maker system, i.e., stroke length of 0.5 m and the gearbox reducer with ratio 1: 40; stroke length of 0.5 m and the gearbox reducer with vbelt and pulley; stroke length of 0.05 m and the gearbox reducer with ratio 1: 40. The performance of the wave maker shows that the third design is more satisfying and suitable than the two others. However, the absorption structure must be added from both ends of the wave tank to reduce the wave reflection.
IDENTIFICATION OF SEA LEVEL RISE BASED ON TIDAL DATA USING THE LEAST SQUARE METHOD Retno Anjarwati; Mochammad Meddy Danial; Arfena Deah Lestari; Jasisca Meirany; Asep Supriyadi
Jurnal Teknik Sipil Vol 23, No 4 (2023): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i4.66656

Abstract

Flood occurs when water overflows its banks due to inadequate channel capacity. Flooding typically results from too much precipitation, which prevents the channel from handling the water flow and results in a deluge. Pontianak City frequently faces severe and protracted flooding when it rains. Both high rainfall and rising sea levels, which impact the Kapuas River, might result in flooding. This argument states that this study was done to anticipate sea level rise for the next six years, which will impact Pontianak City's water flow height using tidal data from Pontianak's Climatology Maritime Station from 2016 to 2021. The average rate of sea level rise, calculated using the least squares approach, is 1.579 cm/year. With an increase rate of 0.017 cm/year, the average sea level rise forecast for the Kapuas River for the next six years is 1.789 cm. It will be necessary to reduce floods in the future to avoid the effects of water flow.
Co-Authors Asep Supriyadi Dendi Dicky Yhavez M Meddy Danial Mochammad Meddy Danial Muhammad Abqari Retno Anjarwati Seno Darmawan Panjaitan Teguh Suratman