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

Abstract:

:The bioconversion of waste paper to single-cell protein at pH <1 by Scytalidium acidophilum is described. Waste paper pretreated with 72% H(2)SO(4) at 4 degrees C was diluted with water to a pH of <0.1 and hydrolyzed. This yielded an adequate sugar-containing substrate for the growth of the fungus. A total of 97% of the sugars (glucose, galactose, mannose, xylose, arabinose) in the hydrolysates were converted to cell biomass. Microbial contamination was not observed. Based on the sugars consumed, 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.

journal_name

Appl Environ Microbiol

authors

Ivarson KC,Morita H

doi

10.1128/AEM.43.3.643-647.1982

keywords:

subject

Has Abstract

pub_date

1982-03-01 00:00:00

pages

643-7

issue

3

eissn

0099-2240

issn

1098-5336

journal_volume

43

pub_type

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