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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Unri Conference Series: Community Engagement
Bintang Sipartogi Panjaitan
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Engineering

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The Effect of Thermal and Alkaline Pretreatment in POME (Palm Oil Mill Effluent) as a Substrate for Dark Fermentation Process on Biohydrogen Production Amna Citra Farhani; Bintang Sipartogi Panjaitan; Ni Wayan Arya Utari
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 3 (2026): June 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i3.1222-1231

Abstract

Palm Oil Mill Effluent (POME) is a promising substrate for biohydrogen production through dark fermentation, although pretreatment is often required to enhance hydrogenogenic activity. This study evaluated the effects of alkaline (NaOH) and thermal pretreatments on POME characteristics and hydrogen production. Fresh POME was sieved and adjusted to initial pH values of 6, 7, or 8 using 6 M NaOH, with or without heat shock treatment (100 °C for 60 min). Batch fermentation was conducted at 60 °C for 24 h, while pH, oxidation-reduction potential (ORP), and dissolved oxygen (DO) were monitored. Pretreatment shifted POME conditions from acidic and oxidative to neutral-alkaline and reductive environments, with several treatments achieving ORP values below −200 mV, indicating favorable anaerobic conditions. Refrigerated storage reduced pH and increased ORP, whereas NaOH addition increased pH and lowered ORP. Hydrogen production varied among treatments. The highest yield was obtained from fresh POME adjusted to pH 7, producing 0.03655 g H₂ with an ORP of approximately −514 mV. In contrast, stored POME subjected to pH 7 adjustment and heat shock produced substantially lower hydrogen yields. In a second batch, pH 8 treatments generated 0.01157–0.02002 g H₂, representing 2.4–3.1 times higher production than the controls, while pH 6 treatments showed the lowest yields. Overall, neutral-to-alkaline pH and strongly negative ORP were associated with improved biohydrogen production.
Pengembangan Umkm untuk Meningkatkan Kesejahteraan Masyarakat di Desa Pagaruyung, Kampar, Riau Erpiani Siregar; Yusmarini Yusmarini; Usman Pato; Dewi Fortuna Ayu; Shanti Fitriani; Emma Riftyan; Yossie Kharisma Dewi; Bintang Sipartogi Panjaitan; Yusni Maulida
Unri Conference Series: Community Engagement Vol 7 (2025): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.7.552-558

Abstract

Pagaruyung Village, Kampar, Riau, has great potential in the agricultural sector, particularly in the abundant production of pineapples. However, these agricultural products have not been fully utilized to improve the welfare of the community. One effort to optimize this potential is by developing Micro, Small, and Medium Enterprises (MSMEs) based on pineapple processing. The objective of this community service activity is to improve the capacity of MSME actors in business management to support the welfare of the community in Pagaruyung Village, Kampar, Riau. The activity involved 16 MSME members and village officials through pre-tests, material delivery, practice, interactive discussions, and post-tests. The results of the activity showed an increase in participants' knowledge and skills in business management, financial recording, product innovation, packaging techniques, and digital marketing strategies. A comparison of the pre-test and post-test results showed an increase in the average score of the participants, which was an indicator of the success of the training. In addition, a community of MSME actors in Pagaruyung Village was formed as a forum for collaboration and sustainable business development with the support of village officials. This activity had a positive impact not only on improving individual capacity but also on strengthening village MSME institutions, which is expected to contribute to improving the community's welfare in a sustainable manner.
Co-Authors Dewi Fortuna Ayu Dewi, Yossie Kharisma Erpiani Siregar Ni Wayan Arya Utari Riftyan, Emma Shanti Fitriani USMAN PATO Yusmarini Yusmarini Yusni Maulida