PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Production of unicellular protein and reduction in contamination from the amount of vinasse
Autor/es:
LENCINA MARIA F; REARTE SAMANTA; ALBARRACIN PATRICIA M.; ROBINSON ADA
Lugar:
Tucumán
Reunión:
Congreso; ISSCT congress Argentina 2019; 2019
Resumen:
Vinasse from ethanol distilleries is a highly contaminating industrial waste and is produced in large quantities. Through biotechnology, it can be used to produce protein while reducing contamination. A strain of the yeast Candida utilis was isolated and grown under different concentrations of aqueous formulations of vinasse, from 10 to 50% [mL/mL]. Experimental trials were carried out in batch reactor with vinasse. Growth of the microorganism was monitored using a carbon dioxide sensor (CO2), and parameters measured were: total nitrogen, COD (chemical demand of oxygen), pH and conductivity, at the beginning and end of each trial. Every 2 hours, the OD (optical density in a liquid environment) was measured to determine cellular concentration. In total nitrogen there was an enrichment of 136% in the environment composed of 50% [mL/mL] of vinasse; the average removal of the chemical demand of oxygen was 43%; pH was 4% lower than at the beginning; and the conductivity was reduced to 9%. Monitoring of yeast growth by measuring the carbon dioxide concentration through time and the OD, showed a fermentation period of 21 hours. Candida utilis strain can develop in a batch reactor with vinasse, in aqueous solutions of 50% [mL/mL] and produce a protein enrichment as well as removing COD. The process reduces the contamination of the main industrial effluent of Tucumán.