Experimental Investigation On Biogas Production From Anaerobic Co-Digestion Of Water Hyacinth And Fish Waste

Abstract

Co-digestion of various wastes and biomass feedstock has been shown to improve the digestibility of the materials and biogas yield. In this study, the co-digestion of water hyacinth and fish waste was studied at different mixing proportions. The anaerobic digestion was carried out in batch digester reactors sized 500 ml and were charged to 10 % of total vol-ume. Co-digestion was conducted for a retention period of 21 days in mesophilic temperature ranging 25.3 °C to 33.4 °C. The research revealed that the highest biogas production was observed from the combination of FW:WH, at 1:2 ratio. The maximum biogas recorded was 0.56 liters with compo-sition of 73.3 % CH4. Furthermore, the water hyacinth also recorded 0.46 liters with the composition of 70 % CH4 which suggest economical feasibility. The overall results showed that blending water hyacinth with fish waste had significant improvement on the biogas yield.

Keywords: co-digestion, anaerobic digestion, biogas, water hyacinth, fish waste