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Characterisation of untreated and treated biodegradable wastes

By Andrew R. Godley, Jim Frederickson, Kathy Lewin, Richard Smith and N. Blakey


As part of a Defra sponsored project (WRT220), approximately 40 biodegradable wastes were characterised according to biodegradability (DR4 and BM100), total PTE content, C:N ratio and biochemical composition. Two leaching tests were employed; upflow percolation test and a one step LS10 test; eluates were analysed for TOC, pH, electrical conductivity, PTEs and a range of cations and anions. This paper contains a limited set of data for a selection of untreated and treated waste types representing four waste treatment processes (composting, MBT, MHT, anaerobic digestion). The DR4 and BM100 tests were found to be appropriate for a wide range of waste types but where possible they should be used in conjunction with other related tests. Longer-term MBT composting processes appeared to produce compost material with reduced ammonium concentrations and extractability of some PTEs. Carbon content (carbon analyzer - LECO) could be estimated as C = LOI/1.9 which is a routine operation. N LECO values were approximately 12% greater than the equivalent N Kjeldahl values

Year: 2007
OAI identifier:
Provided by: Cranfield CERES

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  4. (1996). D5975-96, Standard Test Method for Determining the Stability of Compost by Measuring Oxygen Consumption, doi
  5. (1999). Directive 1999/31/EC on the landfilling of waste. doi
  6. (2004). Effect of composting on extractability and relative availablity of heavy metals present in Calcuta municipal solid waste. doi
  7. (2005). Environment Agency (2005). Guidance on monitoring MBT and other pre-treatment processes for the landfill allowance schemes (England and Wales).
  8. (1999). Full-scale composting experiments at Morpeth.
  9. (2006). Guidance on the Landfill Allowance Schemes: Municipal waste.
  10. (2005). Leachate quality from landfilled MBT waste. doi
  11. (1977). Modified procedure to determine acid-insoluble lignin in wood and pulp,
  12. (1996). Nitrogen Total, In Methods of Soil Analysis. doi
  13. (2002). Soil improvers and growing media. Determination of Nitrogen. Modified Kjeldahl method, British Standards Institution London, UK, doi
  14. Soil improvers and growing media. Determination of organic matter content and ash, doi
  15. Soil improvers and growing media. Extraction of aqua regia soluble elements, doi
  16. (1995). Soil quality Part3: Chemical methods – section 3.13: Determination of Cd Cr Co Cu Pb Mn Ni and Zn in aqua regia extracts of soil – flame and electrothermal atomic absorption spectrometric methods, British Standards Institution, doi
  17. Specification for composted materials, British Standards Institution,
  18. (1977). Standing Committee of Analysts. Amenability of sewage sludge to anaerobic digestion
  19. (1991). Symposium: Carbohydrate methodology, metabolism, and nutritional implications in diary cattle, Methods for dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition, doi
  20. (1998). Water quality – Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy, doi

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