Portfolio of Landfill Projects

    Stabilisation
    Project Manager for Landfill 2000 - A Field Trial of Accelerated Waste Stabilisation

    Project Objective
    This study investigated alternative landfill management procedures designed to accelerate the stabilisation processes occurring in municipal solid wastes (MSW). The Landfill 2000 test cells were located at Dewsbury Landfill, UK. The work was carried in two purpose built prototype waste processing cells each containing 1000 tonnes of MSW. The research objectives were to:

    • Establish optimum cell conditions that would give a three year waste degradation period
    • Quantify the methane generating potential of the waste/sewage sludge mix
    • Determine the biological condition of the waste digestate after a three year period and assess its suitability as an environmentally friendly soil conditioning medium
    Codisposal
    Project Manager for Landfill Codisposal Studies

    During the early 1990's. the guidance in the UK's Waste Management Paper 26, for the practice of co-disposing industrial waste with domestic refuse was re-assessed by the Department of the Environment. At this time, the draft EC Landfill Directive (91/C190/01) proposed controls and loading limits for co-disposal as a means of sorbing and storing non-degradable components of liquid waste, wherein the solid components of domestic refuse present a wide variety of physical and chemical surfaces which may interact with fluids passing over them. To determine the ability of refuse to alter the nature of the incoming waste, it was deemed essential to consider both the physico-chemical absorptive properties of the refuse together with the initial and future characteristics of the landfill.

    Studies initiated by the Department of the Environment were designed to evaluate the effects of acid and organic ligand on both the release and retention of heavy metals by aged and recently emplaced refuse; to determine the chemical stability and partitioning of the retained metal within refuse; and to provide additional data on metal loadings which may be safely co-disposed.
    Microbiology
    Project Manager for the Assessment of UK Funded Projects on Landfill Processes

    The Programme funded by the UK Department of Trade and Industry was not operated in isolation. It has leant heavily on landfill research conducted in the UK (notably funded through the Dept of Environment) and elsewhere (particularly the USA). Although the DTI-funded programme has been innovative in some respects, in others it has developed an existing line of research. Regardless of this, there was a need to assess whether any of the findings made in the programme have already found applications or are likely to be applied in the control of landfill gas production with or without more research.
    Groundwater
    Project Expert for the Long-Term Monitoring of Non-Contained Landfills

    Main Objectives of the Study

    • To produce long-term monitoring data for landfill gas and leachate for non-contained landfill sites, so that the effects of modern and historic landfill practices may be compared and further information gathered on the long-term impact of waste disposal activities, in order to provide the UK Department of Environment with the technical background needed to establish and improve waste management policy and to conduct EC negotiations
    • To provide practical experience of recommended landfill monitoring protocols, and to identify improvements
    • To identify and assess leachate attenuating mechanisms, based on both field and laboratory studies
    Leachate Treatment
    Project Manager for Leachate Treatment Field Trials

    This study, which was carried out in 1994, was intended to demonstrate the operational features of a pilot-scale anaerobic digester linked to a secondary stage nitrification plant for the on-site treatment of landfill leachate.
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