Landfill Gas Flow through Solid Waste


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This course is designed to provide a basic understanding of processes affecting the transport of landfill gas through solid waste, to introduce existing models for describing these processes, and to illustrate how these models can be used to design gas collection wells and gas collection well systems. Participants will acquire a fundamental understanding of landfill gas flow and collection and an appreciation for the modeling tools that can guide the design and operation of landfill gas collection systems.

Upon completion of this course, the attendee will be able to:

  • Describe the processes, problems and opportunities of landfill gas transport through solid waste
  • Discuss the components of landfill gas generation including the influence of moisture, waste composition, waste age
  • Demonstrate the application of analytical and numerical models to the design of vertical and horizontal gas collection wells, gas collection well systems, and operation of existing gas collection system.

Course Length

65 minutes

Presenter Biography

PAUL T. IMHOFF, Ph.D. is an Associate Professor in the Department of Civil and Environmental Engineering at the University of Delaware, Newark, DE, USA. Dr. Imhoff received his degrees in Civil and Environmental Engineering at the University of Cincinnati (BS), University of Wisconsin (MS), and Princeton University (MA, PhD). Dr. Imhoff’s teaching and research interests are in several areas of environmental engineering, but in general focus on the movement of fluids and mass transfer processes in porous media. He has worked for over 15 years on the impact of nonaqueous phase liquids (NAPLs) (e.g., gasoline) on groundwater. In the last 7 years he has employed field, laboratory, and computer modeling techniques to understand and describe the movement of gas and liquid in landfills and to advance technologies for improved capture of landfill gas. Methane oxidation in biologically active cover soils and measurements of airborne methane emissions are the focus of ongoing research projects.


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