Enhancement of biogas production by addition of bovine blood and magnesium sulphate (hard water) to the substrate

This research was done ascertain how to enhance biogas production by introducing Bovine blood (as source of nutrient) and MgSO₄  (for water hardness) into a slurry of mixture of cow and poultry dungs in a bio digester. Local digesters were fabricated. Mixture of piggery and poultry dungs were used as feedstock or substrate. The retention time of 21 days was allowed. At the end of the retention time, it was observed that; bovine blood which started with 19.9 g increased to 231 g. The set up with MgSO4 which started with 24.3 g increased to 136.3 g. the last one which serve control for comparison started with 4.2 g ended up with 80 g. it was noticed that there was initial speed and increase in the set with magnesium sulphate. This is attributed to positive nature of enzymatic activities of Magnesium Sulphate. But that of bovine blood surpassed it. This research is recommending that in the production of biogas, the following should be used. First is mixture of substrate which is called co-digestion. It enhances production. Other ones include addition of bovine blood and measured amount of Magnesium sulphate. Also, the research revealed that the more bovine blood added, the more gas production enhanced.