INVESTIGATION OF DIFFERENT IMPELLER CONFIGURATION ON ANAEROBIC CO-DIGESTION OF MANURE AND ORGANIC WASTE FOR BIO-METHANE PRODUCTION
Keywords:
Impeller, anaerobic digestion, methane productionAbstract
This research aims to study the influence of the type of impeller on the anaerobic co-digestion of manure and organic waste obtained from supermarket. Each type of impeller used for biogas production have different configuration. The anaerobic digestion is carried out in a pilot-scale plastic digester attached to a water-displacement system to measure the volume of biogas produced over time. Three distinct type of impellers were observed such as the straight blade (6-SB), marine blade (6-MP) and pitch blade (4-PB). For this experiment the anaerobic congestion was monitored over a period of 90 days. Data collection included both biogas production rate and pH level during anaerobic digestion. Results demonstrated an improvement in biogas production due to the presence of agitation inside the digester. Agitation from an impeller with dominating axial flow pattern provided a more stable biogas production even though the organic loading rate is relatively high. An increase in average biomethane composition from 50% to 63% and the biogas production rate from 0.2 to 0.6 m3/kgvs resulted when 6-MB was used instead of 6-SB.
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