Anaerobic Co-digestion of Palm Oil Sludge, Cassava Peels, Cow Dung and Ground Eggshells: Process Optimization and Biogas Generation
Year: 2024
Type: article
Abstract: Indiscriminate disposal of crop and animal wastes have grown in acceptance across the globe as environmentally hazardous practices. This study used a 225L polyethylene digester that was especially made to produce biogas from anaerobic co-digestion of palm oil sludge, cassava peels, and cow dung using ground eggshells for pH stabilization, and greenhouse for temperature control. Cassava peels, palm oil sludge, cow dung, and water were combined in a ratio of 1:1:2:5.3 respectively and 1.3 kilogram of crushed eggshells was added. The bio-digestion system generated 650.60L of cumulative biogas throughout the 30-days sludge retention period. The pH averaged 6.0 and the slurry temperature averaged 34.76 oC during digestion, which is favorable for the production of biogas since microbial populations thrive under the hospitable conditions. The biogas produced after a hydraulic retention time (HRT) of over 20 days had the highest methane concentration of 60%, while days under 10 HRT had the lowest methane content, 45.5%. On the 13th day of anaerobic digestion, biogas output peaked at 34.90L and pH and temperature were maintained at 6.5 and 35.0 °C, respectively, the ideal ranges for a healthy process. An efficient technique for producing energy in the form of biogas was shown by optimized anaerobic co-digestion of animal and crop waste utilizing ground eggshells and a greenhouse for pH and temperature control. Future research should focus on developing more efficient, cheaper microbial agents, such as enzymes for biological pre-treatment of palm oil sludge to reduce lignin, which negatively impacts biogas generation.
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $575
OpenAlex ID: W4404979563