ENGINEERING JOURNAL CHIANG MAI UNIVERSITY

Volume 26, No. 01, Month APRIL, Year 2019, Pages 181 - 192

Effect of retention time on dry basis biogas production from broiler manure with rice husk bedding

Narayut Wongsamut, Rotsukon Jawana and Pruk Aggarangsi

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This article focuses on finding design and operating conditions of dry fermentation biogas system using broiler manure mixed with rice husk bedding as input substrate. The research was conducted in 1000-liter plug-flow dry anaerobic reactors with horizontal paddle agitator. Total solid content of input for this experiment was controlled at 25% with reactor retention time of 30 and 60 days. The results for biogas yield at retention time of 30 and 60 days were 0.239±0.016 and 0.249±0.016 Nm3 /kg VSadded with average CH4 content of 48.9±0.6% and 52.0±0.9% respectively. The removal efficiency of total solids were 45.17±2.76% and 79.55±8.88% for the retention time of 30 and 60 days respectively and corresponding the removal efficiency of volatile solids were 53.76±3.57% and 84.32±8.37%. In addition for the retention time at 60 days, the measured NH3-N is in the range of 2,409±208 mg/l which shall not affect methanogen microorganism activity compared to 4,017±221 mg/l for 30-day retention time which can lead to process inhibition.

Keywords

Retention Time/ Dry Fermentation/ Broiler Manure/ Biogas

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