Modeling of cod and bod at full-scale conventional and leachate recirculating landfills
Rapid technological advancements that employ various manufacturing processes have generated a wide spectrum of anthropogenic compounds, many of which generate municipal and/or hazardous waste. Disposal of such wastes have gone into landfills, as these are one of the most economically viable method of dispensation. Although fiscal mandates have been served, ecological concerns have arisen as a result of this practice. landfill disposal sites are subject to leachate generation, which might be followed by groundwater contamination, if not controlled. In keeping, attention has been focused on reversing the deterioration of aquatic and terrestrial environment through the collection and the treatment of leachate wastewater. As a cause of the magnitude of this problem, it has been necessary to explore methods that affect sufficiently but remain cost effective. Several alternatives have been developed; however, biological and physicochemical procedures have been widely used for treatment of leachates of diverse compositions, comprised of a variety of organic pollutants. While this particular method of treatment has been met with measurable success in terms of contamination removal, it has proven to be costly and technically challenging due to the special and temporal variability in leachate quantity and quality. Nevertheless, recirculation, despite the initial opposition, is, as yet, one of the best method available to manage modern landfills and treat their leachate. The benefits of leachate recirculation are explored here through modeling of the chemical oxygen demand (COD) and biological oxygen demand (BOD), and through a comparative presentations between the single pass and the recirculated leachates that are obtained from a full scale landfills. In this study, landfills leachate composition of BOD and COD are modeled as pseudo-first order kinetics, and the rates of disappearance of leachate contamination strength are estimated in terms of half-life concept. All data sets employed in the simulation were gathered ( and referenced) from full-scale landfill literature documentation. The results of this study confirmed the superiority of leachate recirculated landfills over single-pass leaching landfills.
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Bachelor of Science (B.S.)
College of Engineering
Dissertations, Academic -- Engineering;Engineering -- Dissertations, Academic
Length of Campus-only Access
Honors in the Major Thesis
Addasi, Deema, "Modeling of cod and bod at full-scale conventional and leachate recirculating landfills" (1995). HIM 1990-2015. 48.