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Enhanced solubilisation of the residual fraction of municipal solid waste.

På svenska

Author

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).

Publishing year

2008

Language

English

Pages

995-1000

Publication/Series

Water Science and Technology

Volume

57

Issue

7

Document type

Journal article

Publisher

IWA Publishing

Topic

  • Industrial Biotechnology

Keywords

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

Status

Published

ISBN/ISSN/Other

  • ISSN: 0273-1223