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Waste Fermentation and Sand – no Problem?

Anaerobic digestion of biowaste and organic fraction from municipal solid waste (OFMSW), containing certain amounts of contraries such as sand, gravel, glass and plastics is a rather young technology. The growing experience with industrial scale implementation shows the necessity of changing the overall process.

Separation of contraries such as sand, gravel, glass and plastics as a pre-treatment for anaerobic digestion of biowaste and the organic fraction of municipal solid waste (OFMSW) is chiefly implemented to protect the plant equipment. This applies mainly to wet anaerobic digestion but recently also to dry anaerobic digestion. Scum layers are a common problem in wet anaerobic digestion and recently also for the anaerobic digestion of Renewable Raw Materials. Anaerobic digestion (AD) of suspensions containing particulate matter has been widely implemented over the past twenty years. Problems with contraries removal and development of scum layers in the AD reactor are discussed. The technology of anaerobic digestion is therefore possibly not appropriate for suspensions containing particulate matter. The pre-treatment for removal of contraries is generally used only for protection of the equipment and has no further purpose as to energy efficiency, waste management or lower emissions from the plant.

incl. 16 Pages Presentation

Copyright:	© Wasteconsult International
Quelle:	MBT 2007 (Mai 2007)
Seiten:	29
Preis:	€ 0,00
Autor:	Dipl.-Biol. Kirsten Schu Dipl.-Ing. Reinhard Schu
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