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The Coal Authority and the Need for Ochre Utilisation. Andy Morritt Environment Manager The Coal Authority.

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Presentation on theme: "The Coal Authority and the Need for Ochre Utilisation. Andy Morritt Environment Manager The Coal Authority."— Presentation transcript:

1 The Coal Authority and the Need for Ochre Utilisation. Andy Morritt Environment Manager The Coal Authority

2 The Coal Authority was formed 1994 and it manages the Historic Liabilities created by successive generations of coal extraction. Shafts, surface hazards, tips, gas vents, and mine water discharges +680 LIABILITIES MANAGED

3 We now operate 35 Mine Water Treatment Schemes To comply with Water Framework Directive’s 2015 deadline for all controlled waterways to be of ‘a good ecological standard’ - The Coal Authority has increased its build programme from 4 schemes to 8 schemes per year. Scotland 11 England 16 Wales discharges of signification impact plus around 25 potential preventative schemes have been identified

4 Sludge Generation/Collection WetlandsDrying Bays Mobile Plant Industrial plant Estimated 15 to 20 year lifespan Component in substitute soils? Flexible Low Cost 6 to 12 months Landfill OCCS 18 – 24 months Belt/Filter Press Centrifuge Costly Landfill/ Cement Feedstock Generated daily Process engineering Expensive Landfill/ Secondary Feedstock? Old MeadowsHorden Ynysarwed NCMM Silkstone Woolley Polkemmet Silverdale

5 Sludge Quantity IMC Report 2000 Based on 14 operational schemes

6 Sludge Quantity Imperial College assumed 15% dry solids Base on sludge generated at 25 MWTS and 8 Discharges

7 Landfill Directive  Costs £17 per tonne to dispose of as commercial waste.  Landfill tax is set to rise dramatically.  Re designation of waste types.  Reduction in number of available disposal points.

8 Why does the Authority need options for sustainable ochre utilisation? The financial and logistical impact of the Landfill Directive. The financial and logistical impact of the Landfill Directive. The impact of the WFD on our MWTS build programme – the rapid increase in sludge volumes generated. The impact of the WFD on our MWTS build programme – the rapid increase in sludge volumes generated. To aid the development of strategic approach to sludge generation and disposal. To aid the development of strategic approach to sludge generation and disposal. Sludge generation tailored to end users requirements may influence the sizing of drying bays, lagoons or the use of other technologies to generate sludge Sludge generation tailored to end users requirements may influence the sizing of drying bays, lagoons or the use of other technologies to generate sludge

9 THE CURRENT SITUATION IS NOT SUSTAINABLE SLUDGE MANAGEMENT WILL SOON BECOME OUR SINGLE MOST IMPORTANT OPERATIONAL ISSUE WE NEED PRACTICAL, COMMERCIAL SOLUTIONS

10 Thank You


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