Experimental Study of Wet Anaerobic Fermentation by Fresh Water Hyacinth

In this study,fresh hyacinth was cut up to 0.3 cm pieces and then mixed with fermentation liquor with different ratios for batch fermentation experiments(25 ℃).The total weight of the mixture was 3 000g.Biogas characteristics,raw materials,energy utilization were studied and analyzed to give the theoretical foundation of anaerobic fermentation of water hyacinth.The results indicated that the average biogas yield potential of fresh water hyacinth is higher than other common fermentation materials,so it was chose as the ideal materials for large scale biogas project.Higher concentrations of fermentation could increase the gas efficiency,but it is easy to arising acidification process which lead to waste of carbon and lower potential of biogas energy production.