Feasibility Study of Methane Generation from Swine Manure and Eichhornia Crassipes [Mart.] Solms

Abstract

This research was made to study the feasibility of methane generation from swine manure and water hyacinth (Eichhornia Crassipes [Mart.] Solms) under mesophilic conditions. The component of Eichhornia Crassipes [Mart.] Solms was analyzed before pretreatment that was 21.47% cellulose, 14.98% hemicellulose and 9.88% lignin respectively. Eichhornia Crassipes [Mart.] Solms was pre-treated by using the physical pre-treatment and physicalchemical pre-treatment method. The experiment was batch-test operated within forty days of fermentation when incubated at 37 °C. The highest methane production was obtained from water hyacinth physical pre-treatment with a swine manure ratio of 50:50, Hmax 490 ml, Rmax 0.90 ml h-1 and a yield of 135 ml CH4/ g TVS removal respectively. In terms of physicalchemical pre-treatment for water hyacinth, the highest methane production was obtained with water hyacinth to swine manure 50:50 ratio with Hmax 290 ml, Rmax 0.59 ml h-1 and a yield of 130 ml CH4/ g TVS removal respectively. These results showed that the physical pre-treatment method was suitable as a water hyacinth pretreatment for methane production. In terms of economic feasibility, it was evaluated that the cost, net present value (NPV), a benefit to cost ratio (B/C ratio) and payback period (PBP) were 64.27 USD, 12,116.60, 10.52 and thirteen months respectively. Finally, this research will be useful for aquatic invasive species management and biogas production.