Biogas Production from Swine Manure Co-Digestion with Hyacinth

Abstract

The suitable ratio between swine manure and hyacinth for biogas production was considered. From Ratchaburi Province, the swine manure and hyacinth were taken from the pig farm and natural canal, respectively. For this study, mixing ratios between swine manure with hyacinth are 0:100, 25:75, 50:50, 75:25 and 100:0, considered by dry basis. The anaerobic digesters were studied total mixing volume 300 ml in 500 ml volumetric flask on shaker. Total dry substrate is 2 g every ratio, swine manure and hyacinth. And microbial inoculum from pig farm is 3 g (dry basis). The experimental results showed the proportion of 0:100 illustrate the maximum quantity of biogas accumulated equal 243.48 ml. And the ratio of 100:0 shows the minimum cumulative biogas volume equal 33.60 ml. The analysis of the gas production, the blend of swine manure per hyacinth has the highest percentage of methane ratio is 0:100 (CH4=6.4%), and the lowest percentage is the ratio of 100:0 (CH4=0.5 %). For carbon dioxide production, the highest percentage of carbon dioxide is ratio of 0:100 (CO2=4.1 %) and the lowest is ratio 100:0 (CO2=0.9 %). Percentage of methane to compare with total percentage of methane and carbon dioxide has the highest percentage is the ratio of 25:75 (CH4=63.9 %), and the lowest percentage is the ratio of 100:0 (CH4=35.7 %). The highest to compare the lowest, percentage of methane per total percentage of methane and carbon dioxide is percentage of methane ratio 25:75 more than ratio 100:0 is 1.79.