Performance Characteristics of a Pilot Anaerobic Digester Fed by Farmer’s Market Wastes

[摘要] In this study, anaerobic digestion of farmer’s market waste was studied in the long run and the monitoring of operating parameters is reported to provide detailed operational data for field applications. A continuous feeding of farmer’s market wastes with a dry matter of 5% for 160 days were carried out using a 100 L pilot scale CSTR type anaerobic digester under mesophilic operation conditions. Hydraulic retention time (HRT) and organic loading rate (OLR) were kept around 30 days and less than 3.0 kg oDM/m3.day, respectively. During the 160 days feeding period, daily and volumetric biogas production values were reported to be 20-146 L/day and 0.3-2.0 L/L/day, respectively. This corresponds to an average biogas production 535 L/kg oDM, which means that between 40 and 100 m3 of biogas per wet ton of farmer’s market waste could be produced. In conclusion, this study provides a representative operational data for field application of anaerobic digester running on farmer’s market (mostly fruit and vegetables).

[关键词] Bio-methane;Farmer’s market;Solid waste;Trace element