Construction and Performance Evaluation of Locally Built PVC-Based Biogas Digesters

This study investigated the construction and performance of three locally-built biogas digesters designed to produce biogas from various organic material combinations. Conducted during the harmattan season with suboptimal temperatures (below 30°C) and lacking a stirrer mechanism, the experiment faced challenges resulting in low biogas yield within the initial 14-day retention period. A 7-day extension produced minimal biogas, emphasizing the negative impact of cooler temperatures and the need for longer retention times. To improve biogas production, the study recommends utilizing fresh organic waste for enhanced mixing, ensuring airtight digesters to prevent gas loss, and employing materials with high heat retention, wear resistance, and corrosion resistance. These improvements aim to optimize biogas digester performance, particularly in cooler climates. Keywords: biogas, digester, Biogas Purification, Renewable Energy, Sustainable Technology