Protein enrichment of pineapple waste with Saccharomyces cerevisiae by solid state bioprocessing

Saccharomyces cerevisiae was assessed to increase protein levels of pineapple waste (PW) by solid state bioproccssing (SSB) with and without nitrogen supplementation. PW (10 g) was inoculated with S. cerevisiae. Optimum protein content (22% dry basis), which is 3.5-fold the original protein content, reached at 48 h of incubation when 0.25% (NH 4 ) 2 SO 4 was added to medium. Thus, fermented PW can be successfully converted into a protein-rich feed by SSB.