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DETERMINATION OF PARAMETERS FOR DESCRIPTION OF WATER BALANCE IN LANDFILLS WITH STABILISED MUNICIPAL SOLID WASTES

The deposit of untreated waste is forbidden since June 2005 in Germany and since January 2004 in Austria. Wastes for deposit must be pre-treated thermally or mechanical-biologically and have to fulfil the stability criteria of the Waste Storage Ordinance (AbfAblV). Due to the changed waste characteristics in opposite to untreated wastes, high emplacement densities are achievable with pre-treated wastes. Caused by high loads attained by overlaying waste layers on MBT landfills, low hydraulic conductivities could be already ascertained in laboratory and in situ tests.

The present article deals with the hydraulic conductivity by landfills of wastes which are differently pre-treated and stabilised in accordance with the German Waste Storage Ordinance (AbfAblV). The investigations include mechanical biological treated (MBT) wastes from full stream and part stream digestion plants as well as slag from a municipal solid waste incineration (MSWI). One intention of investigation is to point out that by waste modification higher hydraulic conductivity is attainable. Landfill operators have thus the possibility - already during the emplacement of the particularly critical layers close to the landfill basis - to influence the hydraulic conductivity of the landfill body and to stregthen its stability.

Copyright:	© IWWG International Waste Working Group
Quelle:	Specialized Session E (Oktober 2007)
Seiten:	7
Preis:	€ 0,00
Autor:	Dipl.-Ing. Katja Friedrich Dr.-Ing. Dirk Weichgrebe
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