EFFECT OF BACTERIAL ISOLATE AND NUTRIENT ADDITION IN BIOGAS PRODUCTION FROM CO-DIGESTION OF MIXTURE OF ANIMAL MANURE

<p><strong>Abstract</strong></p>\n<p>This research was carried out to ascertain the effect of bioaugmentation and the addition of nutrients during anaerobic digestion leading to biogas production. The feedstock used is a mixture of pig and poultry dung at the ratio of 4:1. <em>Shigella flexineri and Bacillus paramycoides</em> were isolated and used alongside bovine blood and meat extract. After 21 days of anaerobic digestion, the digester with S.flexineri produced gas of 10g and 95.5g for days 2 and 21 respectively. B. paramcoides gave 4.2g and 100.5g in the same manner. For the digester with bovine blood, it gave 20g and 232.2g. While the one with meat extract produced 3g and 63.9g for day 2 and day 21 respectively. From the results and findings, the following recommendations were made. The use of anaerobic bacteria to augment the activities of the indigenous methanogens will increase biogas production. The use of bovine (cow) blood or other source of nutrients will enhance gas production. The addition of meat or protein extract has no significant effect on biogas production.</p>\n<p><strong>Keywords: </strong>co-digestion, augmentation, methanogens, biogas, anaerobic, extract</p>