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Riyadini Utari
Politeknik Ilmu Pelayaran Semarang, Indonesia
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Analisis Kualitas Air Laut Berdasarkan Parameter Fisika dan Kimia (Kekeruhan, DO, pH dan TDS) di Wilayah Perairan Jawa Tengah Indah Nurhidayati; Aryanti Fitrianingsih; Amad Narto; Riyadini Utari; Shabrina Putri Chairandy; Anang Budi Nugroho
Bulletin of Community Engagement Vol. 6 No. 1 (2026): Bulletin of Community Engagement
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51278/bce.v6i1.2224

Abstract

The increase of shipping activities and the entry of domestic, agricultural, and industrial waste through large rivers carry organic and inorganic pollutant loads into the waters of Central Java, becoming a contributing factor to marine environmental pollution. This will affect the seawater quality so that it will damaging the ecosystem. Maintaining seawater quality is one of the most important things, so a scientific study was conducted by analyzing seawater quality based on Physical and Chemical parameters. The analysis was carried out using the Pollution Index (IP) Method and testing on turbidity, dissolved oxygen (DO), acidity level (pH) and Total Dissolved Solids (TDS). Seawater samples were taken at KSOP Semarang, Rembang Sea, Semarang Sea, Kendal Sea, Batang Sea, Cilacap Sea and Kebumen Sea at different times for three consecutive days. Turbidity measurements used a Thermo Scientific type TN-100 Turbiditymeter. TDS measurements used an Extech Instrument type Exstik II TDS Meter. DO measurements used a DO Meter AZ 8430. pH measurements used an OHAUS type Aquasearcher pH Meter. There are four areas which declared to meet the quality standards, those are KSOP Semarang IP value of 0.891, Semarang Sea with IP of 0.891, Batang Sea with IP of 0.970, and Kebumen Sea with IP of 0.851. While the other three seas indicate light pollution, namely the Rembang Sea with IP of 3.867, Kendal Sea with IP of 1.219, and Cilacap Sea with IP of 1.802. Factors influencing the seawater’s physical and chemical parameters include anthropogenic activities such as runoff from land, waste disposal, port activities, and coastal erosion, besides, natural factors including rainfall, river flow, and geological conditions. The impact of changes in physical and chemical parameters on marine ecosystems and human activities are reduction in marine tourism, sedimentation in shipping lanes and ports, reduced biodiversity also a disruption of marine ecosystems.
Analisis Penurunan Kinerja Burner Incinerator terhadap Efektivitas Pengolahan Sludge Oil dan Pencegahan Pencemaran Laut di MV Geopark Venus Narendra Bagaskara; Ely Sulistiyowati; Riyadini Utari
Jurnal Universal Technic Vol. 5 No. 2 (2026): Jurnal Universal Technic
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/unitech.v5i2.4689

Abstract

This study examines the decline in incinerator burner performance on MV Geopark Venus as an effort to prevent marine pollution from ship-generated waste. The research used a descriptive qualitative method through direct observation in the engine room, interviews with the Chief Engineer and First Engineer, documentation, and manual book review during sea practice from August 2024 to August 2025. Data were analyzed using a fishbone diagram with the 4M approach, namely Machine, Material, Method, and Man Power. The findings show that burner performance decline was caused by dirty or clogged nozzles, dirty sludge inlet strainer, residue accumulation on the baffle plate and furnace, poor sludge quality, improper flushing practice, and low crew discipline in planned maintenance. These conditions triggered repeated flame failure, unstable combustion, excessive smoke, waste accumulation on board, and potential violation of marine pollution prevention rules. The study implies that periodic cleaning, diesel oil flushing after sludge burning, stricter Planned Maintenance System supervision, and crew refreshment training are essential to maintain incinerator reliability.
Co-Authors Amad Narto Anang Budi Nugroho Aryanti Fitrianingsih Ely Sulistiyowati Indah Nurhidayati Narendra Bagaskara Shabrina Putri Chairandy