Landfilling of untreated municipal solid waste (MSW) generates environmentally hazardous gas and leachate emissions (El-Fadel et al., 1997). The aim of mechanical-biological waste pretreatment (MBP) is to anticipate this process in a controlled system and to avoid later emissions in the landfill (Leikam and Stegmann, 1997). Main source of these emissions is the microbial metabolism of the easily degradable organic waste compounds, i.e. carbohydrates, proteins, and lipids. The focus of our study was to elucidate the behaviour of these constituents, together with the more recalcitrant compounds lignin and plastics, in the course of different mechanical-biological pretreatments by degradative (wet-chemical) and non-degradative (NMR-spectroscopic) methods. From the composition of organic matter after MBP, conclusions will be drawn with regard to the remaining landfill emission potential.
The CIWM have recently featured an article by our very own Dr David Deegan in the latest edition of their magazine. The article explains why Tetronics International were unhappy to be informed recently that Defra ministers had taken the decision not to remove the derogation that allows Air Pollution Control residues to be disposed of to landfill at three times the standard waste acceptance criteria (3xWAC) threshold for hazardous landfill. Chief technical officer, David Deegan, explains why below:
The waste...
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