Batch anaerobic trials using a source-separated food waste as a substrate with inoculums of different origins were carried out under mesophilic conditions. Reactions were operated both with and without trace element (Co, Mo, Ni, Se, W) supplementation. Supplementation with trace metals had either neutral or slightly negative effects with inoculums originating from reactors with a high background level of metals, such as those for the co-digestion of biowaste and waste activated sludge. For inoculums from reactors treating food waste only, which inherently contain low levels of trace metals, supplementation with these metals increased methane production. In particular, Mo concentrations in the range of 3-12 mg per kg dry matter and Se concentrations of 10 mg per kg dry matter increased methane production to as high as 30-40%. Supplementation with a metal mixture (Co, Mo, Ni, Se and W) increased the methane production to the range 45-65% for inoculums with low background concentrations of trace metals. These findings may have an important impact in the commercial production of methane from food waste.

Effect of trace element supplementation on the mesophilic anaerobic digestion of foodwaste in batch trials: the influence of inoculum origin.

FACCHIN, VERONICA;FATONE, Francesco;CECCHI, Franco;BOLZONELLA, David
2013-01-01

Abstract

Batch anaerobic trials using a source-separated food waste as a substrate with inoculums of different origins were carried out under mesophilic conditions. Reactions were operated both with and without trace element (Co, Mo, Ni, Se, W) supplementation. Supplementation with trace metals had either neutral or slightly negative effects with inoculums originating from reactors with a high background level of metals, such as those for the co-digestion of biowaste and waste activated sludge. For inoculums from reactors treating food waste only, which inherently contain low levels of trace metals, supplementation with these metals increased methane production. In particular, Mo concentrations in the range of 3-12 mg per kg dry matter and Se concentrations of 10 mg per kg dry matter increased methane production to as high as 30-40%. Supplementation with a metal mixture (Co, Mo, Ni, Se and W) increased the methane production to the range 45-65% for inoculums with low background concentrations of trace metals. These findings may have an important impact in the commercial production of methane from food waste.
2013
anaerobic digestion; food waste; inoculum; mesophilic; trace elements; biogas
File in questo prodotto:
File Dimensione Formato  
Facchin Biochem Eng J 2013.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Dominio pubblico
Dimensione 135.39 kB
Formato Adobe PDF
135.39 kB Adobe PDF Visualizza/Apri

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/11562/469951
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 159
  • ???jsp.display-item.citation.isi??? 140
social impact