COMPARISON BETWEEN BIODIGESTERS OPERATED IN PILOT SCALE FOR BIOGAS PRODUCTION FED WITH BOVINE MANURE

Abstract

Comparative study between two biodigesters operated on a pilot scale for biogas production and organic material reduction from bovine manure at two different concentrations, through variables validated for the treatment of anaerobic sludge from station for biological sanitary sewage treatment. After the biodegradation period (29 days), the volume of biogas produced was higher in the biodigester I (more diluted), and removal of organic matter measured as Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) was 51-61,6% and 26.9-43.8% in the biodigesters I and II, respectively. The analysis of the Specific Methanogenic Activity (SMA) in the biodigester I and II were 36 and 17 mL CH4.g-1 SSV.h-1 of methane gas produced Normal Temperature and Pressure (NTP), respectively. The control variables used in this study were suitable.