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All Journal AUSTENIT Jurnal SOLMA
Putra, Aldony Reco
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Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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INVESTIGATION OF FACTORS CAUSING CRACKS IN PRIMARY AIR TUBE BOILERS (CASE STUDY) Putra, Aldony Reco; Syafrullah, Muhammad Deddy; Yuliansyah; Tolusha, Muhammad Rizky; Mahendra, Nanda Yusril
AUSTENIT Vol. 17 No. 1 (2025): AUSTENIT: April 2025
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v17i1.10318

Abstract

The primary air tube in the boiler is an important component because it has the function of supplying air that will be used in the combustion process. The reliability of the function of the primary air tube contributes to the quality of the combustion results in the boiler. The purpose of this study is to investigate and analyze the causes of cracks that occur in the primary air tube boiler. The method used in conducting the analysis is using SEM (Scanning Electron Microscope) and microstructure. SEM testing will be used to study the morphology of the crack surface in detail, identify the crack propagation mechanism, and see any indications of corrosion or other elements that may be the cause of damage. Meanwhile, microstructure analysis aims to observe the internal composition of the material to ensure whether there is a structural mismatch that affects the strength and resistance of the material to operational conditions. Based on the test results obtained, there are indications of cracks due to square groove welding found in observations with 100x and 400x magnification only on samples 125 and 126. In the microstructure test with the same sample, indications of cracks were also found that occurred from the outside of the stainless compound due to residual stress and changes in atomic structure at the time of its formation and coupled with the corrosive fuel used, but have not spread to the inner carbon steel material.
Penerapan Mikrobubble Generator Untuk Peningkatan Kadar Oksigen Terlarut (DO) Pada Pengolahan Limbah Cair Rumah Sakit Anwar, Zainuri; Dzaky, Muhammad Irfan; Rifa’i , Ahmad Imam; Putra, Aldony Reco; Roihan, Mohammad; Saputra, Fajri Bayu; Natanegara, Muhammad Audhi
Jurnal SOLMA Vol. 15 No. 1 (2026)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v15i1.21120

Abstract

Pendahuluan: Limbah cair medis dapat mencemari lingkungan jika tidak dikelola dengan baik. Salah satu cara untuk memperbaiki baku mutu limbah cair yaitu dengan mengingkatkan kadar oksigen terlarut (DO). Studi ini bertujuan untuk menerapkan teknologi Microbubble Generator (MBG) untuk meningkatan kadar oksigen terlarut pada limbah cair medis. Metode: Transfer teknologi yang terdiri dari desain dan pabrikasi perangkat mikrobubble, pengujian kelayakan, dan pemasangan pada instalasi pengolahan limbah cair. Hasil: Terjadi peningkatan kadar oksigen terlarut pada limbah cair setelah pemasangan microbubble generator dari 0,4 mg/l menjadi 7,7 mg/L. Kesimpulan: Mikrobubble generator merupakan solusi teknologi tepat guna yang modern, efisien, dan layak diterapkan.
Co-Authors Mahendra, Nanda Yusril Muhammad Irfan Dzaky Natanegara, Muhammad Audhi Rifa’i , Ahmad Imam Roihan, Mohammad Saputra, Fajri Bayu Syafrullah, Muhammad Deddy Tolusha, Muhammad Rizky Yuliansyah Zainuri Anwar