PEMBERDAYAAN INDUSTRI TEMPE MAHER DALAM PEMANFAATAN LIMBAH CAIR TEMPE DENGAN PENAMBAHAN STARTER KOTORAN SAPI DAN SUBSTRAT JERAMI PADI (ORYZA SATIVA) SEBAGAI ENERGI BIOGAS MELALUI PENDEKATAN ASSET-BASED COMMUNITY DEVELOPMENT (ABCD)NIM.: 21106030074Muhammad Rofiq Rista Al HazzaauthorThis community-based research was conducted at the Maher Tempe Industry in Bantul with the objectives of identifying local assets, empowering partners in utilizing tempe liquid waste into biogas, and analyzing biogas quality as scientific validation of the community service program through the Asset-Based Community Development (ABCD) approach. Tempe liquid waste, cow dung, and rice straw are organic wastes that have the potential to cause environmental pollution if not properly managed; however, they contain organic matter that can be utilized as renewable energy feedstock. This study employed an experimental method through anaerobic fermentation in a batch-type digester with a 60-day retention time. Two substrate variations were used: P0 (tempe liquid waste and cow dung) and P1 (tempe liquid waste, cow dung, and rice straw). The analyzed parameters included fermentation temperature and pH, methane gas content using Gas Chromatography–Flame Ionization Detector (GC-FID), and calorific value using Gas Chromatography–Thermal Conductivity Detector (GC-TCD). Social evaluation was conducted using a Likert-scale questionnaire to assess the partner’s response to program implementation. The results showed that the fermentation process occurred within a temperature range of 29–30°C under mesophilic conditions. The final pH values were 7.08 for substrate P0 and 6.99 for substrate P1. GC-FID analysis indicated that the combustible gas component was predominantly methane (CH₄), reaching 99.247% in P0 and 99.995% in P1. The calorific values obtained were 14.31 MJ/Nm³ for P0 and 23.45 MJ/Nm³ for P1. These results indicate that the addition of rice straw as a carbon source improved the energy quality of the produced biogas. Therefore, the utilization of tempe liquid waste combined with cow dung and rice straw with a 60-day retention time is capable of producing biogas with high methane content and good calorific value, while supporting asset-based community empowerment.660 Teknologi Kimia dan Ilmu yang Berkaitan2026-01-29UIN SUNAN KALIJAGA YOGYAKARTA;FAKULTAS SAINS DAN TEKNOLOGIThesis