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Enhanced solubilisation of the residual fraction of municipal solid waste.

In English

Författare

Summary, in English

The Swedish ordinance banning the landfilling of organic material after 2005 has led to rapid developments towards waste incineration, while biological alternatives have been less studied. In this study, biological alternatives for enhanced methane production from residual municipal waste (the remaining waste fraction after source separation) are investigated. The strategies investigated were recirculation of leachate, recirculation of leachate with aeration, flooding of the solid bed, and enzyme addition after initial leaching in an anaerobic, batch, two-stage digestion process with recirculation of digested leachate. The degree of solubilisation of organic compounds achieved was higher for initial digestion in a two-stage anaerobic digestion system followed by the addition of cellulolytic enzymes than in the other strategies investigated. The overall net solubilisation achieved was 0.48 g COD/g VS(added) corresponding to an increase of 34%. In addition, the digestion time was considerably reduced using this strategy. For the other strategies investigated the solubilisation yields obtained were similar, 0.31 g COD/g VS(added).

Publiceringsår

2008

Språk

Engelska

Sidor

995-1000

Publikation/Tidskrift/Serie

Water Science and Technology

Volym

57

Issue

7

Dokumenttyp

Artikel i tidskrift

Förlag

IWA Publishing

Ämne

  • Industrial Biotechnology

Nyckelord

  • biogas
  • enzymatic hydrolysis
  • grey waste
  • landfill directive
  • residual waste

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0273-1223