Comparison of Three Practical Processes for Purifying Wine Distillery Wastewaters

  1. L. I. Romero
  2. D. Sales
  3. E. Martínez de la Rosa 1
  1. 1 Department of Chemical Engineering, Faculty of Sciences, University of Cadiz, Apdo.40, E-11510 Puerto Real (Cadiz), Spain.
Revista:
Process Biochemistry International

ISSN: 1359-5113

Año de publicación: 1990

Volumen: 25

Páginas: 93-96

Tipo: Artículo

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Resumen

Wine alcohol distilleries produce eight volumes of high strength waste (vinasses) from every volume of ethanol. This waste has an acidic character and a high organic content (20-25 g 1-1 COD). This paper examines three microbiological treatments (aerobic, mesophilic anaerobic, and thermophilic anaerobic) for the reduction of vmasses strength. The processes were studied to optimise operating conditions of each process in order to achieve an adequate purifying performance. Once optimum operating conditions had been attained, biodegradable COD removals around 90% were achieved in all cases, but optimum HRTs were eight days for aerobic, six for mesophilic anaerobic, and four for thermophilic anaerobic processes. A schematic flow-diagram for the complete purifying of vinasses using the three processes is given.