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All Journal Buletin Poltanesa Jurnal Elektronika dan Teknik Informatika Terapan
Septaviola Dini Utami
Politeknik Perkapalan Negeri Surabaya
Agriculture, Biological Sciences & Forestry Computer Science & IT Education

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The Treatment of Water Using Activated Carbon Adsorption and Sand Filtration: Physical Characteristics Analysis for Clean Water Production Imaniah Sriwijayasih; Anda Iviana Juniani; Dika Rahayu widiana; Fitroh Resmi; Septaviola Dini Utami; Eky Novianarenti; Anisa Ayuk Lestari; Raisha Risandra Rabbani
Poltanesa Vol 27 No 1 (2026): June 2026
Publisher : P3KM Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/tanesa.v27i1.3821

Abstract

The Kalibaru River in Indonesia faces significant pollution challenges due to industrial and human activities, threatening ecosystem balance and water quality. To address this, a sand and carbon filter-based water filtration system is employed to improve water quality to grade 2 clean water standards.The method involves filtration using sand filters, carbon filters. Results show improved water quality with parametersThe decrease in turbidity from 6 NTU (March) to 5 NTU (June) indicates the filtration system's ability to remove suspended particles. Additionally, the decrease in electrical conductivity from 179.83 umhos (March) to 173.41 umhos (June) and TDS from 95.9 mg/L (March) to 92.7 mg/L (June) shows the system's ability to reduce dissolved ion concentrations.The stability of pH between March (7.58) and June (7.38) indicates that the filtration system does not affect the water's pH balance, remaining within the class 2 water quality standard (6-9). The relatively stable water temperature between March (27.5°C) and June (27°C) also shows that the filtration system does not significantly affect the water temperature  with Indonesian Government Regulation No. 82 of 2001.The system effectively removes contaminants, reduces turbidity, and kills pathogenic bacteria, making the water suitable for recreation, freshwater aquaculture, livestock, agriculture, and other uses. Regular monitoring and maintenance are necessary to sustain water quality.Indonesia's river water quality has been declining due to industrial pollution, pesticide and fertilizer use, and plastic waste. To combat this, efforts are being made to improve wastewater management, promote sustainable agriculture practices, and enhance public awareness.  
Analisis Pengendalian Kebutuhan Material Reparasi Sistem Flexible Ducting pada Ruang Akomodasi Kapal MT Musi Rikky Leonard Rikky; Ovi Prina Gastriani; Septaviola Dini Utami; Irkham Fatody Suryawan
Jurnal Elektronika dan Teknik Informatika Terapan ( JENTIK ) Vol. 4 No. 1 (2026): Maret: Jurnal Elektronika dan Teknik Informatika Terapan (JENTIK)
Publisher : Politeknik Kampar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59061/jentik.v4i1.1514

Abstract

This study analyzes material requirement control for the repair of insulated aluminum flexible ducting in the accommodation spaces of MT Musi. The objectives are to determine the required duct size and length, compare the planned requirement with actual field utilization, and formulate a controlled procurement approach for ship HVAC repair. A case study approach was employed by integrating damage inspection, general arrangement drawings, repair lists, room-dimension measurements, heat-load calculations using the Air Handling Unit Calculation method, duct-diameter selection, and verification of the actual material used. Heat loads were determined based on transmission, solar radiation through windows, lighting, equipment, occupants, and humidity control. The predominant forms of damage included joint leakage, deformation, and duct constriction caused by service age and the ship’s operating environment. The selected material was an 8-inch flexible duct, corresponding to an airflow requirement range of approximately 200–225 mm and the specifications stated in the repair list. The initial planned length across four decks was 34 m. After applying a 10% allowance, the requirement increased to 37.4 m and was rounded up to 38 m. Measurements of the removed ducting indicated an actual requirement of 36 m, resulting in a difference of 2 m or 5.56%. The integration of engineering calculations, route tracing, and field verification produced a more controlled procurement estimate while reducing the risks of material shortages and excessive waste.
Co-Authors Anda Iviana Juniani Anisa Ayuk Lestari Dika Rahayu Widiana Eky Novianarenti Fitroh Resmi Imaniah Sriwijayasih Irkham Fatody Suryawan Ovi Prina Gastriani Raisha Risandra Rabbani Rikky Leonard Rikky