The research was conducted to determine the rate of decline in water level of cassava opaque by using biomass energy from palm fronds. Drying is done by using a drying chamber with a length of 130 cm, width 90 cm and high 120 cm. The drying chamber is formed in such a manner that is equipped with a chimney, two-level drying rack and 2 drums as heat sources. Drying heat sources derived from biom…