4. CONCLUSIONS
This study investigated the effectiveness of cow
dung for biogas production and presented the performance
characteristics of the anaerobic digestion in batch and
semi-continuous operations. Under these conditions, the
cow dung digestion reaches 47% VS reduction and
approximately 48.5% COD reduction with biogas yield of
0.15 L biogas/kg VSadded. Despite large variations in
pollutants concentrations, an improved performance of
anaerobic digestion of the biodegradable fraction of cow
dung was achieved. The results showed that cow dung