Aproveitamento de emulsão de oleo soluvel de corte para produção de proteina microbiana de Saccharomyces lipolytica

AUTOR(ES)

Maria Assima Bittar

DATA DE PUBLICAÇÃO

1995

RESUMO

A medium containing used cutting oil emulsion as carbon source was used by Saccharomyces lipolytica CCT 0913 for microbial protein production (SCP) and Chemical Oxygen Demand (COD) removal. It was utilized two culture medium, one of them containing (NH4)2SO4 its concentration was studied in the range of 2.5 to 15 g/1. In the other, containing NH4Cl, concentration was changed in the range of 0.1 to 1.5 g/1. In the medium containing (NH4)2SO4 it was verified the initial pH influence (5.0, 5.5 e 6.5) in cellular growth in erlenmeyers flasks. The best result (1.12 g/1 of cellular dried mass with 31.92% of protein) was obtained with 15 g/1 of (NH4)2SO4, initial pH 5.5 and 5% of cutting oil emulsion. With medium containing NH4Cl the fermentations were carried out in erlenmeyers and fermentors of 1 and 6 liters. In the 6 liter fermentor the percentage of cutting oil emulsion was changed in the range of 5 to 40% (v/v) in the culture medium. With 20% of cutting oil emulsion and 1.0 g/1 of NH4Cl it was possible to produce 3.19 g/1 of cellular dried mass and to reduce the medium COD from 6188 to 4596 mg/1.

ASSUNTO(S)

biotecnologia fermentação saccharomyces hidrocarbonetos

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