A process was developed at the University of Pretoria through which it became possible to simultaneously purify organic effluents and produce a constant quality Single Cell Protein (SCP) product under non-aseptic conditions. Performance of the process as applied to a sugar-furfural effluent is described. The organism selected was Aspergillus fumigatus, a thermotolerant filamentous fungus. Typical yield is 0.56 g biomass per g COD utilized. The amino acid profile of the biomass compares well with other edible protein sources. It was possible to reduce the COD concentration in the effluent from ± 8000 mg/L to ± 150 mg/L.

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