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All Journal Jurnal Ilmu Lingkungan Jurnal Reka Lingkungan Journal of Degraded and Mining Lands Management Indonesian Journal of Biotechnology IJEMS (Indonesian Journal of Environmental Management and Sustainability) IDENTIFIKASI: Jurnal Ilmiah Keselamatan, Kesehatan Kerja dan Lindungan Lingkungan Abdimas Universal Jurnal Green Growth dan Manajemen Lingkungan EUNOIA: Jurnal Pengabdian Masyarakat Biodiversitas Journal of Biological Diversity
Sipahutar, Merry Krisdawati
Universitas Balikpapan
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Nursing Public Health Social Sciences Transportation Other

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Penerapan Keselamatan Dan Kesehatan Kerja Di Kapal Tugboat Pada PT. Rusianto Bersaudara Mahendra, Analta Syahdu Cesar; Noeryanto, Noeryanto; Sipahutar, Merry Krisdawati
EUNOIA Vol 5 No 2 (2026): Juli 2026
Publisher : Program Studi D4 K3 Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/eunoia.v5i2.1156

Abstract

Penerapan keselamatan dan kesehatan kerja (K3) merupakan aspek penting dalam operasional kapal tugboat yang memiliki tingkat risiko tinggi, seperti bahaya mekanis, kebakaran, cuaca ekstrem, dan aktivitas kerja di lingkungan yang sempit serta dinamis. Penelitian ini bertujuan untuk menggambarkan penerapan sistem K3 di kapal tugboat milik PT Rusianto Bersaudara, sebuah perusahaan pelayaran yang bergerak dalam jasa penarikan dan pemanduan kapal. Metode yang digunakan meliputi observasi langsung di atas kapal, wawancara dengan awak kapal, serta telaah dokumen prosedur keselamatan perusahaan. Hasil kajian menunjukkan bahwa perusahaan telah menerapkan beberapa komponen penting K3, seperti penggunaan alat pelindung diri (APD), pelaksanaan inspeksi rutin peralatan keselamatan, pelatihan keselamatan kerja, serta penerapan prosedur darurat. Meskipun demikian, ditemukan beberapa hambatan seperti keterbatasan pemahaman awak kapal terhadap prosedur tertentu, kurangnya dokumentasi inspeksi, dan kebutuhan peningkatan frekuensi pelatihan keselamatan. Penelitian ini menyimpulkan bahwa penerapan K3 di kapal tugboat PT Rusianto Bersaudara telah berjalan cukup baik namun masih memerlukan peningkatan dalam aspek pengawasan, kompetensi awak kapal, dan pemeliharaan peralatan keselamatan untuk mencapai standar keselamatan pelayaran yang optimal.
An Efficiency and Environmental Impact of Hospital Wastewater Treatment Systems in Balikpapan, Indonesia Merry Krisdawati Sipahutar
Jurnal Green Growth dan Manajemen Lingkungan Vol. 16 No. 1 (2026): Jurnal Green Growth dan Manajemen Lingkungan
Publisher : Program Studi Magister Manajemen Lingkungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jgg.161.04

Abstract

This study evaluated the performance and environmental implications of hospital wastewater treatment systems in Balikpapan, Indonesia, a rapidly urbanizing city with expanding healthcare infrastructure. Wastewater samples from three representative hospitals (Type A: large referral; Type B: regional; Type C: private mid-scale) were analyzed for physicochemical parameters, heavy metals, pharmaceuticals, and microbial contaminants following APHA (2023) and USEPA Method 3050B protocols. Influent samples exhibited high organic loads (BOD₅: 210–450 mg/L; COD: 420–780 mg/L), far exceeding national discharge limits. Overall removal efficiencies ranged from 70–86%, with only Hospital A’s integrated aerobic–anaerobic–chlorination system achieving regulatory compliance. Persistent pollutants, including heavy metals (Hg, Pb, Cd) remained detectable in effluents, with incomplete removal (<50%) and ecological Risk Quotients (RQ) exceeding 1. Microbial analysis revealed high concentrations of total coliforms (10⁴–10⁶ CFU/mL) and E. coli (10³–10⁴ CFU/mL), indicating incomplete disinfection. Comparative assessment underscored that operational management, maintenance frequency, and operator training were equally crucial as system design in determining treatment efficiency. The findings emphasize the urgent need to incorporate tertiary treatment technologies and enhance regulatory enforcement to mitigate pollutant release, protect aquatic ecosystems, and safeguard public health in tropical developing cities.
Biodegradation of benzene by a novel Rhodococcus sp. MKS26 isolated from petroleum refinery wastewater for remediation of hydrocarbon-contaminated environments Sipahutar, Merry Krisdawati; Abdullah , Rosnah; Duc, Ha Danh
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11279

Abstract

Petroleum refinery activities are major sources of benzene contamination that contribute to the degradation of industrial soils and water resources, posing significant environmental and ecological risks. Biological remediation using indigenous microorganisms represents a sustainable alternative to conventional physicochemical treatments for restoring hydrocarbon-contaminated environments. This study aimed to isolate and characterize an efficient indigenous benzene-degrading bacterium from petroleum refinery wastewater and evaluate its biodegradation performance under different environmental and nutritional conditions. The isolate, designated Rhodococcus sp. MKS26, was identified by morphological characterization and 16S rRNA gene sequence analysis. Benzene degradation was evaluated under varying substrate concentrations, pH, temperature, nutrient composition, oxygen availability, and metal ion supplementation, while biodegradation kinetics were analyzed using the Michaelis–Menten model. Phylogenetic analysis placed strain MKS26 within the Rhodococcus erythropolis clade. Under optimal conditions (50 mg/L benzene, pH 7.0, and 30 °C), strain MKS26 removed 95.8 ± 1.2% of benzene within 72 h. Benzene degradation followed Michaelis–Menten kinetics, with a maximum specific degradation rate (Vmax) of 1.2 mg/mg/h and a half-saturation constant (Ks) of 8-12 mg/L. Benzene removal was enhanced by succinate, inorganic nitrogen, adequate oxygen, and Fe²+. The strain also maintained stable activity in non-sterile refinery wastewater. These findings demonstrate the potential of Rhodococcus sp. MKS26 as an indigenous bioaugmentation agent for benzene-contaminated wastewater and hydrocarbon-polluted industrial environments.
Co-Authors Abdullah , Rosnah Agustiani, Siti Nurul Aina, Asty Nur Auliyyah, Roja Bandaso, Agchel Randa Budiharto, Alam Duc, Ha Danh INDRAYANI INDRAYANI Iwan Zulfikar Kansip, Kansip Mahendra, Analta Syahdu Cesar Muhamad Ramdan, Muhamad Muhammad Adam Mukminin, Inayah Ummul Noeryanto, Noeryanto Nur Falah Setyawati Pratama, Ryan Putra Putra, Chandra Kurniawan Ryan Angga Pratama Savero, Gavra Simamora, Jose Hendrik Marulitua Simon, Natalin Markus Sesa Sri Wahyuni Tiraninda, Nurizka Xuan, Nguyen Thi Kim Yuliana, Lina Zainul, L.M.