Author(s)

Mostafa A. Warith

Abstract

The techniques that can be used to enhance biological degradation in landfills include: leachate recirculation, addition of nutrients, shredding, sludge and buffer solutions addition, lift design, temperature and moisture content management. Manipulation of these variables promotes a more conducive environment for microbial activity. This paper presents the results of a leachate recirculation experiment into three solid waste cells. The leachate was recirculated over a period of 65 weeks, and effluent samples were obtained on a weekly basis and analyzed for pH, BOD, and COD concentrations. The experimental results indicated that addition of supplemental materials to leachate during recirculati

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