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Influence of phenols and furans released during thermal pretreatment of olive mill solid waste on its anaerobic digestion

Caroca, E. ; Serrano, A. ; Borja, R. ; Jiménez, A. ; Carvajal, A. ; Braga, A.F.M. ; Rodriguez-Gutierrez, G. ; Fermoso, F.G.

Waste management (Elmsford), 2021-02, Vol.120, p.202-208 [Periódico revisado por pares]

United States: Elsevier Ltd

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  • Título:
    Influence of phenols and furans released during thermal pretreatment of olive mill solid waste on its anaerobic digestion
  • Autor: Caroca, E. ; Serrano, A. ; Borja, R. ; Jiménez, A. ; Carvajal, A. ; Braga, A.F.M. ; Rodriguez-Gutierrez, G. ; Fermoso, F.G.
  • Assuntos: Anaerobiosis ; Furans ; Methane ; Methane production ; Olea ; Phenolic and furan compounds ; Phenols ; Plackett-Burman Design ; Solid Waste ; thermal pretreated OMSW
  • É parte de: Waste management (Elmsford), 2021-02, Vol.120, p.202-208
  • Descrição: •Plackett-Burman design assess individual phenols and furans effect on CH4.•The individual and combined effect of mixtures of phenols and furans were evaluated.•Vanillin had a negative significant effect on both Gmax and.Rmax•Hydroxymethylfurfural had a negative significant effect on Gmax, but improved.Rmax•Ty, F, DHPG and HT were stimulators instead of inhibitors. The application of thermal pretreatments to facilitate its anaerobic digestion has associated phenols and furans production, which are commonly identified as inhibitory compounds. Phenols and furans extraction can be done from a liquid phase produced after the thermal pretreatment. In the present study this dephenolized liquid phase (DLP) showed an increase of 42% in methane yield compared to the raw liquid phase (LP) demonstrating the inhibitor character of such compounds. The main extracted phenols and furans were: 3,4-Dihydroxyphenylglycol (DHPG), Hydroxytyrosol (HT), Tyrosol (Ty), Vanillic acid (AcV), Hydroxymethylfurfural (HMF), Vanillin (V) and Furfural (F).This study also aimed to evaluate the individual effect on methane production of these specific phenols and furans the within the mixture of several ones from LP. The evaluation of the individual compounds over the methanogenesis of a dephenolized liquid phase showed that only V was inhibitory on both methane yield and methane production rate. HMF had a significantly negative effect on methane yield, but improved the methane production rate instead. Ty, F, DHPG and HT favoured the methane yield and production rate. Additionally, it was observed that negative effect of some individual phenols and furans was counteracted by the positive effect of other compounds.
  • Editor: United States: Elsevier Ltd
  • Idioma: Inglês
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