The practice of disposing of waste in conventional dry-tomb landfills is not sustainable. A sustainable
alternative is the landfill bioreactor and its variations. Landfill bioreactor approach includes specific design and operation
techniques to enhance waste degradation and landfill gas (LFG) production. Although this approach has
been known to landfill researchers and practitioners for a few decades, there are only a few successful field-scale
landfill bioreactors in operation. This paper provides a comprehensive review of technological challenges with
landfill bioreactors and associated design and operational details. A key issue that should be addressed by a landfill
bioreactor designer is moisture and gas movement within a waste matrix that changes its properties continuously in
time and space. The design components such as the leachate collection and removal system (LCRS), leachate recirculation
system, and gas collection system could be severely impacted if the traditional landfill design and operation practice is not modified
to take into consideration the behavior of waste matrix in time and space. Considering that a landfill bioreactor can be used as a biomass
waste to energy facility, this paper details the LFG generation processes, the factors affecting the LFG generation and theoretical
LFG generation estimation techniques as well as the important design, construction and operational issues associated with landfill bioreactors.
Keywords: Anaerobic waste degradation, biocell, landfill bioreactors, leachate recirculation.
Rights & PermissionsPrintExport