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All Journal Jurnal Cakrawala Maritim Jurnal Teknologi Maritim
Luluk Kusminah, Imah
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Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Mechanical Engineering

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Penerapan Filtrasi Anaerobik di Masjid Sungai Geneng, Lamongan Tamimah, Ni'matut; Sa’diyah, Aminatus; Azis Ramadani, Tarikh; Luluk Kusminah, Imah; Puspita Sari, Devina; Trisna Nugraha, Anggara; Mahardhika, Pekik
Jurnal Cakrawala Maritim Vol. 8 No. 1 (2025): Jurnal Cakrawala Maritim
Publisher : P3M Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35991/jcm.v8i1.58

Abstract

Many areas in Indonesia still have water sources that are unsuitable for daily use. One such area is the vicinity of Sungai Geneng Mosque, Kembang Bahu District, Lamongan Regency. In this area, the water source contains high levels of lime and organic materials, making it unsuitable for consumption. To address this issue, the Corporate Social Responsibility (CSR) Team from Politeknik Perkapalan Negeri Surabaya (PPNS) implemented a water filtration application in the area. The filtration method used is the anaerobic filtration system. Based on the filtration results, high levels of lime were successfully reduced to meet health standards, making the water clean and safe for consumption. Additionally, the organic materials in the water were converted into biogas, which serves as an alternative energy source for cooking and environmentally friendly vehicles.
Pengaruh Variasi Temperatur dan Waktu Tahan Post Weld Heat Treatment pada Kekerasan Material A335 Grade P92 untuk Aplikasi Pembangkit Listrik Wahyu Restu, Eriek; Wahyudi, M Thariq; Karim, M; Anggara, Dika; Farrasy, Abiyyuda Putra; Luluk Kusminah, Imah; Toto Wibowo, Alvalo
Jurnal Teknologi Maritim Vol. 8 No. 1 (2025): Jurnal Teknologi Maritim
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35991/jtm.v8i1.50

Abstract

A335 Grade P92 steel is a martensitic high temperature which widely-applicated on power plan component with high pressure, therefor it required high tightness. Martensitic properties of material caused the high hardness and easily crack. So, Post Weld Heat Treatment is mandatory for A335 Grade P92 welding. This research analyzed the effect of temperature (705°C, 740°C, and 775°C) and holding time (60 and 120 minutes) of post weld heat treatment to hardness. Hardness test result was decreasing with the increasing of temperature and holding time of post weld heat treatment. Weld metal was obtained the highest hardness on specimen with 705°C of temperature and 60 minutes of holding time of post weld heat treatment with 302,85 kgf/mm2, otherwise the lowest hardness was 285,13 kgf/mm2 on 775°C of temperature and 120 minutes of holding time of post weld heat treatment. Microstructure result was obtained of ferrite, pearlite, and martensite on increasing of temperature and holding time of post weld heat treatment which shown the wider of grain.
Co-Authors Anggara Trisna Nugraha Dika Anggara Farrasy, Abiyyuda Putra Karim, M Mahardhika, Pekik Puspita Sari, Devina Sa’diyah, Aminatus Tamimah, Ni'matut Tarikh Azis Ramadani Toto Wibowo, Alvalo Wahyu Restu, Eriek Wahyudi, M Thariq