Single-Cell Protein Production by the Acid-Tolerant Fungus Scytalidium acidophilum from Acid Hydrolysates of Waste Paper

摘要

The bioconversion of waste paper to single-cell protein at pH Scytalidium acidophilum is described. Waste paper pretreated with 72% H2SO4 at 4°C was diluted with water to a pH of S. acidophilum produced higher yields in shake cultures than many other Fungi Imperfecti. In aerated cultures, productivity increased, and yields of 43 to 46% containing 44 to 47% crude protein were obtained. This compares favorably with Candida utilis, a yeast used commercially to produce single-cell protein. The chemical constituents and the essential amino acids of the fungal cells were similar to those of other fungi. The nucleic acid content was characteristic of microbes containing low levels of nucleic acid. The advantages of using S. acidophilum for single-cell protein production are discussed.