Produksi Biogas dari Campuran Feses Sapi dan Ampas Tebu (Bagasse) dengan Rasio C/N yang Berbeda (Biogas Production from Mixture of Dairy Manure and Bagasse with Different C/N Ratio)

Abstract

<p>he experiment was conducted to determine biogas quality produced from mixture of dairy manure and bagasse with different C/N ratio level, and to know the optimal mixture ratio. There were three group treatments based on C/N<br />ratio level : C/N ratio 22, 30, and 35 with three replications each. Nine units of 20 litre batch-feeding digesters were used during 30 days examination. The main data were BOD, COD, pH and VFA values, total biogas volume, and<br />methane value. C/N ratio of dairy manure and bagasse was 22, 12, and 198. Dry matter mixture was 7%. BOD value was decreased 54.33%, 27.89%, and 42.86%, COD value was decreased 35.85%, 8.29%, and 27.88% and biogas was<br />produced as much as 29.42 litre, 68.51 litre, and 114.73 litre by each treatment with methane values of 24.16%, 27.5%, and 23.38%. VFA value were 27.19 ml mol, 27.86 ml mol, and 30.73 ml mol respectively during operation. BOD and<br />COD value decrease, pH value, biogas temperature, and total biogas volume was different among treatment. The optimal mixture was C/N ratio 30 treatment. The results indicated that bagasse could be used as material mixture in biogas production.</p><p>(Key words : Biogas, Dairy manure, Bagasse, C/N ratio, Methane)<br /><br /></p>