Value addition of cassava and cassava wastes is necessitated by rapid post-harvest spoilage,
deterioration, low protein content and environmental pollution caused by the effluent and the other
associated wastes that poses aesthetic nuisance. Biogas plants of all sizes and varying levels of
technical sophistication not only recover the energy contained in cassava wastes but also eliminate
most of the animal and human health problems associated with contamination. Studies have shown the
technical feasibility and nutritional desirability of converting carbohydrates and their residues into
products containing a large amount of protein by means of microorganisms. Wastes transformation
offers the possibility of creating marketable value-added products. There exists a great potential in the
use of microorganisms such as fungi for the production of high quality feedstuffs from the abundantly
available agro-industrial wastes, particularly carbohydrate residues. Cassava wastes can be processed
and converted into value-added components such as methane (biogas), pig meat, ethanol, surfactant
and fertilizer etc. Attention is now focused on the by-products of the anaerobic decomposition of the
waste that takes place in a biodigester, which are the liquid fraction called biol and the solid fraction or
biosol, which are excellent fertilizers for a variety of crops. The present review addresses the progress
that has been made in each of these aspects with emphasis on the advantages of biol and biosol
fertilizers
Value addition of cassava and cassava wastes is necessitated by rapid post-harvest spoilage,
deterioration, low protein content and environmental pollution caused by the effluent and the other
associated wastes that poses aesthetic nuisance. Biogas plants of all sizes and varying levels of
technical sophistication not only recover the energy contained in cassava wastes but also eliminate
most of the animal and human health problems associated with contamination. Studies have shown the
technical feasibility and nutritional desirability of converting carbohydrates and their residues into
products containing a large amount of protein by means of microorganisms. Wastes transformation
offers the possibility of creating marketable value-added products. There exists a great potential in the
use of microorganisms such as fungi for the production of high quality feedstuffs from the abundantly
available agro-industrial wastes, particularly carbohydrate residues. Cassava wastes can be processed
and converted into value-added components such as methane (biogas), pig meat, ethanol, surfactant
and fertilizer etc. Attention is now focused on the by-products of the anaerobic decomposition of the
waste that takes place in a biodigester, which are the liquid fraction called biol and the solid fraction or
biosol, which are excellent fertilizers for a variety of crops. The present review addresses the progress
that has been made in each of these aspects with emphasis on the advantages of biol and biosol
fertilizers
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