Characteristic study on biomass derived flyash

In this study the most important chemical and physical properties of three kinds of fly ash originating from the circulating fluidized boiler incinerating agriculture and forest residues (i.e.rice husk, straw, wood chips, sawdust and bark) at a power plant (12+15MW) in Jiangsu province of China is determined The study clearly show that fly ash is fine (0.001-0.2 mm), and have poor specific surface area (about 5 m²/g). The mineral composition is SiO₂, CaCO₃, KCl. The fly ash is strong alkaline, and nutrient elements are enriched in the fly ash. The total concentrations of Cd, Hg, Pb below the limit values, therefore the fly ash can be used as fertilizer, but care should be taken.