Effect of ultrasound pre-treatment in the anaerobic co-digestion of cattle manure with food waste and sludge

  • G. Quiroga /
  • L. Castrillón /
  • Y. Fernández-Nava /
  • E. Marañón /
  • L. Negral /
  • J. Rodríguez-Iglesias /
  • P. Ormaechea
Journal ar
Bioresource Technology
  • Volumen: 154
  • Fecha: 01 enero 2014
  • Páginas: 74-79
  • ISSN: 18732976 09608524
  • Tipo de fuente: Revista
  • DOI: 10.1016/j.biortech.2013.11.096
  • Tipo de documento: Artículo
  • Editorial: Elsevier Ltd
This paper presents a study of the effect of applying ultrasound pre-treatment in the production of methane when co-digesting mixtures of cattle manure with food waste and sludge. A series of experiments were carried out under mesophilic and thermophilic conditions in continuously stirred-tank reactors containing 70% cattle manure, 20% food waste and 10% sewage sludge. Ultrasound pre-treatment allows operating at lower HRT, achieving higher volumetric methane yields: 0.85LCH4/L day at 36°C and 0.82CH4/Lday at 55°C, when cattle manure and sewage sludge were sonicated. With respect to the non-sonicated waste, these values represent increases of up to 31% and 67% for mesophilic and thermophilic digestion, respectively. © 2013.

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