Compost-like material or thermal valorization – impact on MBT Plant economics and environmental aspects – Case studies in Portugal and UK

The paper focuses on the utilisation of the solid product from the biological Treatment stages of three MBT Plants which treat the organic fraction of MSW by means of wet mechanical pre-treatment units followed by anaerobic digestion. The experiences of two MBT Plants in Portugal (CVO Valorlis and CVO Suldouro) which produce compost-like material are contrasted with the experiences at the MBT Bredbury Parkway (UK) which, by drying the digested solids, produces a RDF with low calorific value for further use in thermal valorisation. The impact of these two different approaches on the operating costs for the treatment of the digested solids as well as the environmental aspects for both valorization paths is discussed.

This article describes and compares two different ways to treat the dewatered digestate from an anaerobic digestion facility for the Organic Fraction from residual Municipal Solid Waste. At the Bredbury Parkway MBT the dewatered digestate is dried to >50% DSin order to be used as low calorific value RDF, while at the CVO Suldouro and the CVO Valorlis the dewatered digestate under goes a composting step in order to obtain a compost-like material that can be used for certain agricultural purposes.



Copyright: © Wasteconsult International
Quelle: Waste-to-Resources 2015 (Mai 2015)
Seiten: 12
Preis inkl. MwSt.: € 6,00
Autor: Dipl. Ing. Stephan H. Schulte
João Rita
Joel Braga
Chris Mannall
Dipl. Ing. Hans Kübler

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