One- and two-stage anaerobic digestion of food waste aimed at recovering methane (CH4) and hydrogen and methane (H2 + CH4), respectively, were compared in order to assess the potential benefits from the two-stage process in terms of overall energy recovery. Results suggest that a two-stage process where the first reactor is properly operated in order to achieve a significant net hydrogen production, may display a 20% comparatively higher energy recovery yield as a result, mainly, of enhanced methane production as well as of the associated hydrogen production. The highest methane production of the two-stage process was due to improved hydrolysis and fermentation of food waste, with increased amounts of volatile fatty acids being readily available to methanogenesis.

Energy recovery from one- and two-stage anaerobic digestion of food waste

DE GIOANNIS, GIORGIA;MUNTONI, ALDO
;
SPIGA, DANIELA
2017-01-01

Abstract

One- and two-stage anaerobic digestion of food waste aimed at recovering methane (CH4) and hydrogen and methane (H2 + CH4), respectively, were compared in order to assess the potential benefits from the two-stage process in terms of overall energy recovery. Results suggest that a two-stage process where the first reactor is properly operated in order to achieve a significant net hydrogen production, may display a 20% comparatively higher energy recovery yield as a result, mainly, of enhanced methane production as well as of the associated hydrogen production. The highest methane production of the two-stage process was due to improved hydrolysis and fermentation of food waste, with increased amounts of volatile fatty acids being readily available to methanogenesis.
2017
Anaerobic digestion; Food waste; One-stage; Two-stage; Hydrogen; Methane
File in questo prodotto:
File Dimensione Formato  
WM-S-17-00742.pdf

accesso aperto

Descrizione: Articolo scientifico (submitted)
Tipologia: versione pre-print
Dimensione 842.75 kB
Formato Adobe PDF
842.75 kB Adobe PDF Visualizza/Apri
2017 DeGioannis et al - One stage Two stage.pdf

Solo gestori archivio

Descrizione: Articolo scientifico
Tipologia: versione editoriale
Dimensione 717.59 kB
Formato Adobe PDF
717.59 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/216025
Citazioni
  • ???jsp.display-item.citation.pmc??? 4
  • Scopus 125
  • ???jsp.display-item.citation.isi??? 104
social impact