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Physicochemical Properties, Heavy Metal Contamination, and Resource Recovery Potential of Petroleum Sludge in Indonesia Fadilah, Siska Nuri; Setiawan, Wahyu; Setiawan, Pratama; Putri, Aninda; Gulo, Fakhili
Indonesian Journal of Chemistry Vol 26, No 2 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.110376

Abstract

Petroleum sludge (PS) is a hazardous waste rich in hydrocarbons and heavy metals, posing significant risks to the environment. Although numerous studies have been conducted globally, a comprehensive characterization of PS originating from Indonesia remains scarce. This study aims to fill this gap by conducting a thorough physicochemical characterization, environmental pollution assessment, and sustainable utilization potential evaluation of PS. The results revealed that the sludge contains a high oil content (15.56%), an extremely high COD level, and is dominated by iron as a heavy metal (4,585.67 mg/L). The TCLP analysis showed that Pb exceeded the regulatory threshold, indicating a significant leaching potential and toxicity risk. BET analysis indicated a mesoporous structure with a specific surface area of 4.73 m2/g, suggesting its potential use as an adsorbent or catalyst support. The high elemental composition of carbon (25.05%), hydrogen (3.10%), and calorific value (3,418 kcal/kg) further highlights its potential for thermochemical conversions such as pyrolysis or gasification. These findings provide a scientific foundation for PS management in Indonesia and highlight its potential conversion into value-added resources, thereby supporting circular economy strategies and sustainable development goals.
Implementation of Renewable Energy Based Kemplang Drying House Technology in Talang Pangeran Ulu Village South Sumatra Setiawan, Pratama; Jeri, Muhammad; Aprillianti, Intan Cahyani; Gultom, Jogi Imanuel; Musyahada, Maulia
Jurnal Pengabdian UNDIKMA Vol. 7 No. 2 (2026): May
Publisher : LPPM Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jpu.v7i2.19293

Abstract

This community service program aims to introduce renewable energy innovation through the development of a solar-powered kemplang drying house constructed with polycarbonate material in Talang Pangeran Ulu Village, South Sumatra. The initiative was designed to address the limitations of conventional sun drying, which is highly dependent on weather conditions and often results in prolonged drying times and inconsistent product quality. The implementation adopted a training and mentoring approach conducted in two stages. The first stage provided technical guidance on the design, construction, and operation of the solar-powered drying house. The second stage focused on enhancing participants’ capacity in digital marketing for product promotion through social media and e-commerce platforms. The activities applied a Participatory Rural Appraisal (PRA) approach, encouraging community involvement through discussions and practical demonstrations. Evaluation instruments included pre-test and post-test questionnaires, observation sheets to assess operational skills, and temperature measurements inside the drying house. The evaluation employed a one-group pre-test–post-test design, and the collected data were analyzed using descriptive quantitative techniques to determine improvements in participants’ knowledge and skills. The results indicated that the drying house increased the internal temperature from approximately 32°C to 45–50°C, representing an increase of about 13–18°C. This condition accelerated moisture evaporation and improved drying efficiency. With daily production reaching 8,000–10,000 pieces, the kemplang exhibited more uniform dryness and better hygiene. Additionally, improved product quality and the adoption of digital