Anaerobic Digestion of Dairy Manure and Rice Straw in Batch Reactor for Biogas Production

Abstract

Abstract. Anaerobic digestion of dairy manure and rice straw was conducted to produce biogas in batch reactor. Influence of temperature and substrate concentration were investigated. The experimental results showed that compared to room temperature and themophilic condition, mesophilic condition is more suitable for anaerobic digestion with 1.69 kgTS·m -3 ·d -1 of organic loading rates, 0.237 m 3 ·kg TS -1 of total solid (TS) biogas yields, and 0.401 m 3 ·m -3 ·d -1 of volumetric biogas yield respectively. Among five kinds of substrate concentration, 10% was more suitable for anaerobic digestion to produce biogas with total biogas production amount of 4710 mL after 30 days and 30 days was suitable retention time. These results could provide theoretical data for practical biogas engineering.