It is possible to reduce the levels of caffeine and tannin
waste and by-products of coffee to increase their use in
animal feed. Physical (percolation), chemical (alcohol
extraction) or microbiological (fermentation) methods may
help reducing caffeine content and enhance animal
performances (Brand et al., 2000). Drying followed by
several months of storage may reduce the amount of
antinutritional factors (Bressani et al., 1973). Coffee pulp
fermented with Aspergillus niger was used successfully at