Utilization of Cassava Wastes for Value Added Products: An Overview

Different categories of wastes and residues generated during cassava processing must be properly managed so as not to constitute environmental hazard. The huge cost of treatment and disposal create avenue for alternative uses to be explored. This study reviewed the various value added products which can be produced from cassava wastes substrate as feed-stock for bio-energy. Theoretically, it was estimated that one kilogram of cassava peelings will yield 118 g of bio-methane and 226 g of bio-ethanol, one liter of cassava wastewater will yield 16 g and 9 g of bio-ethanol and bio-methane, respectively. Whereas 20 g and 10 g of bio-ethanol and bio-methane, respectively will be obtained from one liter of bagasse. These was also compared with the estimated values obtained based on Chemical Oxygen Demand (COD): 23.9 g of CH4/g COD in one liter of cassava wastewater, Volatile Solids (VS): 23.1 g of CH4/g VS in one liter of cassava wastewater and Total Solids (TS):22.9g of CH4/g TS in one liter of cassava wastewater and 0.414 g using Buswell's equation. This is study can be utilized when making decision on the potentials of cassava wastes for value added products.