Johan Syafri Mahathir Ahmad

ORCID: 0000-0001-6543-4051
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About
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Research Areas
  • Microbial Fuel Cells and Bioremediation
  • Wastewater Treatment and Nitrogen Removal
  • Waste Management and Recycling
  • Water Quality Monitoring Technologies
  • Heavy Metal Pollution Remediation
  • Enhanced Oil Recovery Techniques
  • Petroleum Processing and Analysis
  • Recycling and Waste Management Techniques
  • Heme Oxygenase-1 and Carbon Monoxide
  • Legal Studies and Policies
  • Biofuel production and bioconversion
  • Municipal Solid Waste Management
  • Urban Transport Systems Analysis
  • Management and Optimization Techniques
  • Biodiesel Production and Applications
  • Anaerobic Digestion and Biogas Production
  • Insect Utilization and Effects
  • CO2 Sequestration and Geologic Interactions
  • Computer Science and Engineering
  • Methane Hydrates and Related Phenomena
  • Fecal contamination and water quality
  • Porphyrin and Phthalocyanine Chemistry
  • Additive Manufacturing and 3D Printing Technologies
  • Engineering and Technology Innovations
  • Economic Growth and Fiscal Policies

Universitas Gadjah Mada
2017-2024

University of Tsukuba
2017-2019

Universiti Malaysia Terengganu
2012

Abstract The increase in waste at landfills has become a difficult problem to solve. Educational institutions are one of the largest contributors generation, especially food waste. They required have their own processing facilities. Therefore, this study evaluates potential environmental impact BSFL based within campus environment. facility is located PIAT, Yogyakarta. This employs E-LCA approach assess impacts, with data analysis conducted using SimaPro v.9.5.01 software and ReCiPe Midpoint...

10.1088/1755-1315/1489/1/012058 article EN IOP Conference Series Earth and Environmental Science 2025-04-01

Crude oil is an indispensable energy feedstock for daily activities, although some amounts of metallic porphyrins components with undesired characteristics have been identified. These constituents are assumed to originate from the geochemical process chlorophyll and heme derivatives. In addition, their chemical structures thoroughly characterized using spectroscopy techniques, while several analytical methods were adopted in detection concentration quantification crude oils. The demerits,...

10.22146/ijc.62521 article EN cc-by-nc-nd Indonesian Journal of Chemistry 2021-05-07

Di Selogiri, Wonogiri, Jawa Tengah, terdapat banyak kegiatan tambanh emas tradisional yang masih menggunakan merkuri sebagai proses amalgamasi dalam pengolahan emas. Mobilitas merupakan faktor penting untuk memahami resiko pencemaran dan remediasi. Tujuan penelitian ini adalah menganalisis mobilitas pada limbah tambang atau tailing ada di lokasi penelitian. Sepuluh sampel diambil dari kolam penampungan limbang tambang, kemudian konsentrasi total diukur dengan AAS. Fraksinasi diulakukan...

10.14710/jil.22.3.803-807 article ID cc-by Jurnal Ilmu Lingkungan 2024-01-06

Berbagai macam teknologi telah diterapkan pada Instalasi Pengolahan Air Limbah (IPAL) domestik, namun tidak diketahui secara pasti realibitas dan kinerjanya. Penelitian ini membahas tentang realibilitas IPAL di Bulaksumur Residence untuk pemenuhan standar kualitas efluen jika akan dibuang langsung ke lingkungan air kelas 4 digunakan sebagai penyiraman taman. beroperasi kontinyu kinerja diamati selama 82 hari. menggunakan sistem aerasi intermittent dengan memanfaatkan resirkulasi limbah...

10.33019/fropil.v9i1.2387 article ID FROPIL (Forum Profesional Teknik Sipil) 2021-06-28

Batik wastewater produced in the batik industry Bayat, Klaten Regency, contains chromium and phenol, which pass quality standard. This study aimed to evaluate ability of tuff breccia from area reduce phenol concentration wastewater. Mineralogical chemical characterization was conducted investigate breccia's mineralogical composition. A batch regeneration test The indicates that consists fragments, minerals (quartz, plagioclase), clay (smectite illite). results show grain size pH value...

10.37577/sainteks.v5i1.531 article EN cc-by-nc-sa Sainteks Jurnal Sains dan Teknik 2023-03-26

Plastic waste will potentially cause serious environmental problems. In this study aluminum-plasticspackaging is recycled into pellets for alternative fuel. pelletized using an extruder with temperature variations of 140°C, 160°C and 180°C. Then, the calorific value, moisture content, density compressive strength pellet were measured. The value 38.79 mJ/ Kg. shows good results because it exceeds standard solid fuel more than 600 kg/m 3 . Meanwhile, exceeding specified experiencing increase...

10.4028/p-rj26ci article EN Key engineering materials 2022-05-16

The Techno Park basin, built as an extension of a small tributary the Code River primarily acts retention basin for runoff during rainy season. It improves quality water that has been degraded by domestic wastewater discharge from surrounding community. Therefore, this study aims to assess extent which can be improved with aeration technology. technology is Microbubble Generator (MBG) using 100 Watts submersible pump three horizontal nozzles at depth 40 cm surface. Furthermore, profiles...

10.22146/jcef.3599 article EN cc-by-sa Journal of the Civil Engineering Forum 2021-12-17
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