Bioreactor Landfills & Leachate Recirculation 101


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A synopsis of industry perspectives on bioreactor landfills and leachate recirculation that highlights lessons learned at field scale and future research directions.

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

  • Discuss various industry perspectives on bioreactor landfills
  • Define bioreactor research directions including:
    • Design
    • Permitting
    • Operational challenges
    • Choice of devices
    • Landfill seep causes
    • Slope stability

Course Length

79 minutes

Additional information



Presenter Biography

ROGER B. GREEN is a scientist with Waste Management, Inc., in Cincinnati, Ohio. His responsibilities include: the development and evaluation of chemical and biological processes for waste treatment and remediation and providing technical support to the company’s soil bioremediation facilities and bioreactor landfill projects. He is involved in the company’s work on greenhouse gas emission quantification and modeling and biologically active landfill cover systems. Mr. Green has been employed by Waste Management since 1993. He earned Bachelor of Science and Master of Science degrees from the University of Cincinnati. Mr. Green is currently a Senior Scientist with Waste Management, Inc. In this role his responsibilities include the development, testing and evaluation of innovative chemical and biological processes for waste treatment and remediation. Mr. Green also provides technical support to the company’s network of BioSiteSM soil bioremediation facilities, which have treated over 12 million tons of soil contaminated with petroleum, pesticides, and explosives. He is a member of Waste Management’s bioreactor landfill program team and is responsible for study design, data collection, management, and analysis at the Outer Loop bioreactor project. He is also involved in the company’s research and development of biologically active landfill cover systems.

TIMOTHY G. TOWNSEND, Ph.D., P.E. is a professor in the Department of Environmental Engineering Sciences at the University of Florida. He received his Doctoral degree from the University of Florida in 1995. Dr. Townsend’s area of specialty in teaching and research is solid waste management. He teaches undergraduate and graduate students on a variety of waste-related topics, including landfill design and general solid and hazardous waste management. Areas of expertise include bioreactor landfills, construction and demolition debris, waste leaching, and management of special wastes. Past research efforts included examining the formation of odor-causing compounds as a result of drywall disposal in landfills and developing techniques for minimizing this problem. He has published over 100 technical publications on his research topics. He has consulted on landfill and solid waste issues throughout the US and abroad. Dr. Townsend is a registered professional engineer in Florida and currently serves as the Jones Edmunds Professor of Environmental Engineering at the University. P.E. License number 60283.


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