DECOMPOSITION MODELLING

 

Objective:  What do we need from landfill decomposition models to effectively assess landfilling options?

Schedule:

0:00 - 0:05  Introduction

0:05 - 0:20  Presentation 1 and questions

0:20 - 0:35  Presentation 2 and questions

0:35 - 1:00  Focused discussion

1:00 - 1:15  Presentation 3 and questions

1:15 - 1:30  Presentation 4 and questions

1:30 - 1:55  Focused discussion

1:55 - 2:00  Wrap-up

Discussion:

The discussion time will center on a series of questions.  Some of the discussion time will be spent in small groups generating ideas and reporting back to the overall group; other time will be for open discussion before the whole audience.  The chair will lead the discussion time and keep it on track.  The discussion will be steered into the examination of the following questions:

  • What do we need to know about waste composition?
  • What do we need to know about the physical character of placed waste?
  • How much microbiological detail is enough?
  • Is there something we can monitor to check if our model is working?
  • Do decomposition models have problems with parameter uniqueness/identifiability?
  • What limits further improvements in decomposition models?
  • What are our priorities for improving the modelling of degradation?
  • To what extent does improved decomposition modelling depend on improved understanding of coupled processes (eg, gas, water flow, settlement)?
  • How can we facilitate coupling of decomposition models to other landfill models (eg, settlement models)?
  • Is there scope for a committee to develop a decomposition model to serve as a benchmark to benefit research/practice (similar to the IAWPRC/IAWQ/IWA activated sludge model)?

Although all of the above questions will not be examined, the chair will use them to focus discussion.  They will also be used during pre-conference e-mail communications with the platform presenters to help them refine and orient their presentations appropriately.

Presentations:

Vavilin, Vasily 

Modelling chemical and biological processes of solid waste anaerobic digestion.
Affiliation: Water Problems Institute, Russian Academy of Sciences, Moscow, Russia. 

Martin, Duncan
‘Rčaction front’ mechanism in anaerobic decomposition
Affiliation:  Dept of Chemical Environmental Sciences , University of Limerick, Limerick, Ireland.

Maltby, Van
Development of model parameters for prediction of methane production from paper 
Affiliation:  NCASI, Western Michigan University, Kalamazoo, USA

McDougall, John
Simulating controlled infiltration and leachate recirculation in landfilled waste
Affiliation: School of Built Environment, Napier University, Edinburgh, UK

Chair

Mark Milke, Department of Civil Engineering, University of Canterbury, New Zealand, m.milke@civil.canterbury.ac.nz

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