Thermophilic Anaerobic Digestion of Winery Waste (Vinasses): Kinetics and Process Optimization

  1. L. I. Romero 1
  2. D. Sales 1
  3. D. Cantero 1
  4. M. A. Galán 1
  1. 1 Departamento de Ingeniería Química, Facultad de Ciencias, Universidad de Cadiz, 11510 Puerto Real (Cadiz), Spain
Revista:
Process Biochemistry

ISSN: 1359-5113

Año de publicación: 1988

Volumen: 23

Páginas: 119-125

Tipo: Artículo

GOOGLE SCHOLAR

Otras publicaciones en: Process Biochemistry

Resumen

Vinasses from wine-distilleries has a high organic contaminant load (16-25 g COD 1- 1) an acidic character (pH about 3,8),and are discharged at almost 90°C. For this reason, this paper examines the viability of the thermophilic anaerobic process as an alternative to mesophilic process for the reduction of waste strength. Start-up and acclimatisation of the digesters until attainment of steady-state conditions, and kinetic studies for the thermophilic anaerobic process to achieve an optimum purifying performance were realized. Substrate utilization and methane production models, both proposed by Chen and Hashimoto, predicted accurately theperformance of the process and may be used in the design of treatment units. Once optimum operating conditions had been attained (at four days retention time and 4.25 kg COD m- 3 day-• load density) COD removal of 88% and 0.25 m3CH4 kg- 1COD added were achieved.