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The feasibility of incorporating a dedicated treatment zone for controlled anaerobic stabilization of leachate within a bioreactor landfill was investigated at laboratory scale. Three cylindrical simulated landfill reactors were constructed; two reactors (control and test) of equal
size received a synthetic waste mixture and were operated with leachate recirculation, while a third dedicated treatment zone reactor with a waste pine bark medium was seeded with anaerobically digested sludge to initiate methanogenesis. Each reactor was individually operated until both the
control and test reactors exhibited similar acidogenic phase behavior, and the dedicated treatment zone reactor fully developed active methanogenesis. The dedicated treatment zone reactor was then connected to the test reactor to compare performance of bioreactor landfills with or without
dedicated treatment zones, and eventually to the control reactor to demonstrate flexibility and effectiveness for treatment of excess leachate from newer landfill cells or areas as well. The overall experimental results indicated that more rapid and complete waste stabilization, as measured
by gas and leachate indicator parameters, was achieved with leachate recirculation and a dedicated treatment zone than leachate recirculation alone.
Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.