The production of single cell protein from biogas slurry with high ammonia-nitrogen content by screened Nectaromyces rattus

In this study, a novel method was proposed to obtain single cell protein (SCP) in yeast by using biogas slurry as culture medium. The results show that Nectaromyces rattus was the most efficient at producing SCP among the 7 different yeasts studied. Acetic acid was a better pH regulator than hydroch...

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Bibliographic Details
Published in:	Poultry science 2021-09, Vol.100 (9), p.101334-101334, Article 101334
Main Authors:	Zhang, L., Zhou, P., Chen, Y.C., Cao, Q., Liu, X.F., Li, D.
Format:	Article
Language:	eng
Subjects:	ammonia nitrogen biogas slurry MICROBIOLOGY AND FOOD SAFETY Nectaromyces rattus single cell protein
Online Access:	Get full text
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Summary:	In this study, a novel method was proposed to obtain single cell protein (SCP) in yeast by using biogas slurry as culture medium. The results show that Nectaromyces rattus was the most efficient at producing SCP among the 7 different yeasts studied. Acetic acid was a better pH regulator than hydrochloric acid. After culture with the initial NH4+-N concentration 2,000 mg/L, C/N ratio 6:1, the initial pH 5.50 and rotation speed of 200 rpm, a total cell dry weight of 12.58 g/L with 35.96% protein content was obtained. Nineteen amino acids accounted for 46.85% of cell dry weight, and proline content was as high as 12.0% of the cell dry weight. However, sulfur-containing amino acids, including methionine and cystine, were deficient. Further research should focus on the high cell density culture to increase SCP production.
ISSN:	0032-5791 1525-3171