Inverted Phase Fermentation and ultrasound pre-treatments of sewage sludge: Biochemical methane potentials

  • L. Negral /
  • E. Marañón /
  • A. García-Regüela /
  • Y. Fernández-Nava /
  • L. Castrillón
Journal ar
Journal of Residuals Science and Technology
  • Volumen: 10
  • Número: 3
  • Fecha: 01 julio 2013
  • Páginas: 147-152
  • ISSN: 15448053
  • Tipo de fuente: Revista
  • Tipo de documento: Artículo
Ultrasound disruption and Inverted Phase Fermentation -IPF- (enzymatic hydrolysis) were applied to sewage sludge. IPF is a novel technique for sludge thickening resulting in a clarified phase ("Liquid Phase" -LP-) beneath a thickened fraction ("Solid Phase" -SP-). An increased hydrolysis rate is obtained in both phases. Biochemical Methane Potentials after applying these pre-treatments were compared: 0.054 LCH4/ gVSo for untreated sludge, 0.065 LCH4/gVSo for sludge pre-treated with ultrasound at 7,500 kJ/kgTS, 0.226 LCH4/gVSo for the SP, and 0.264 LCH4/gVSo for the LP. Sludge pre-treated with ultrasound at 15,000 kJ/kgTS did not achieve the level of methane production untreated sludge did. © 2013 DEStech Publications, Inc.

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