Augmented in-situ bioremediation of landfill leachate by electron acceptor supplementation using naturally occurring earth minerals: Reaction wall theory

A number of leachate treatment methods are suggested that incorporate iron rich reactive walls. Reactive walls can be placed downgradient of landfill, where they will intercept escape leachate as it travels away from the landfill. A number of research projects have been started at the University of Oklahoma to study leachate degradation under iron and/or sulfate reducing environments. Examination of cores from downgradient of the close Norman landfill indicates that iron and sulfate reduction activity has occurred. Microcosms designed to stimulate iron or sulfate reduction indicate that full strength landfill leachate can be degraded under iron or sulfate reducing conditions.