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All Journal Hydrogen: Jurnal Kependidikan Kimia Al-Ijtimā: Jurnal Pengabdian Kepada Masyarakat
Poeloengan, Vikky Pramudya Herdiansyah
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Religion Humanities Chemistry Economics, Econometrics & Finance Education Other

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Pengaruh Pupuk Organik Cair Dari Limbah Tahu Terhadap Pertumbuhan Benih Jagung Di Desa Kencong Kabupaten Jember Poeloengan, Vikky Pramudya Herdiansyah; Mufida, Lutfi Diah; Wahyuningtyas, Dwi; Rohman, Faris Sahrur; Hidayah, Ida Nur; Naibaho, Pedro Renardo; Pratama, Riska Ayu; Pratama, Deven Agni
Al-Ijtimā': Jurnal Pengabdian Kepada Masyarakat Vol 5 No 1 (2024): Oktober
Publisher : Lembaga Penelitian, Publikasi Ilmiah dan Pengabdian kepada Masyarakat (LP3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53515/aijpkm.v5i1.160

Abstract

The tofu making process produces solid waste and liquid waste. Most of the liquid waste is disposed of directly into the river causing pollution to the river and other water sources. Therefore tofu liquid waste processing is needed to reduce environmental pollution and benefit the wider community, one of which is by utilizing tofu liquid waste into liquid organic fertilizer by fermentation. The fermentation process takes 15 days with the addition of EM4, rumen, sugar solution, and water. All ingredients are mixed and put into a closed container. This activity was carried out in Ponjen Hamlet, Kencong Village. This activity involved KKN student and farmer group. The forms of activities carried out were visits to the Ponjen Hamlet farmer group, conducting interviews, observations, fertilizer making practices, observing corn seeds, data processing, and drawing conclusions.
Synthesis and Application of CaO-MgO Catalyst from Dolomite for Biodiesel Production Poeloengan, Vikky Pramudya Herdiansyah; Pratama, Ananda Melati Octa; Saputro, Erwan Adi
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 1 (2026): February 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i1.19579

Abstract

Dependence on dwindling fossil fuels drives the development of biodiesel as a renewable alternative energy. However, the use of homogeneous catalysts, which are difficult to separate, non-reusable, and generate waste, remains a major obstacle. This review aims to examine the potential of dolomite-based heterogeneous catalysts (CaO–MgO) as a more sustainable solution. These catalysts are synthesized through the calcination of dolomite, an abundant carbonate mineral with main components of CaCO₃ and MgCO₃, and can be modified by adding Fe₂O₃, Fe₃O₄, SiO₂, or Na doping to enhance catalytic activity, surface area, and bifunctional properties. Various vegetable oil feedstocks such as Crude Palm Oil (CPO), used cooking oil, tamanu oil, and canola oil have been successfully converted into biodiesel via transesterification (and simultaneous esterification-transesterification) using these catalysts, yielding biodiesel >90% with quality that meets national and international standards. Thus, the synthesis of CaO–MgO catalysts from dolomite promises an effective, economical, and environmentally friendly application for large-scale biodiesel production.
Co-Authors Dwi Wahyuningtyas Erwan Adi Saputro Hidayah, Ida Nur Mufida, Lutfi Diah Naibaho, Pedro Renardo Pratama, Ananda Melati Octa Pratama, Deven Agni Pratama, Riska Ayu Rohman, Faris Sahrur