INVESTIGATING THE FIELD CAPACITY OF A MUNICIPAL REFUSE DUMPSITE AT THE UNIVERSITY OF MAIDUGURI, BORNO STATE- NIGERIA

Alfred Ndahi Jones, Ibrahim Shettima Muhammad, Abubakar Sadiq Muhammed

Abstract


This study was conducted to assess the Field Capacity (water holding potential of solid waste per kilogram prior to leaching) of municipal solid waste at the University of Maiduguri dumpsite. To determine the field capacity of municipal solid waste a lysimeter was constructed to simulate the activities within the refuse dumpsite. The method consisted of applying dynamic compaction to a representative sample of rubbish collected from the university waste dumpsite to simulate three depths, at 0.0, 0.5 and 1.0m, respectively. The results show that the higher the compaction of the sample, the smaller the amount of water required to satisfy the field capacity and thus to start the leaching process. Similarly, field capacity was found to be inversely proportional to the dry field density, with an optimum value of 0.38l/kg. It is noteworthy that the results obtained from the study could be used to understand the capacity of other landfills with similar characteristics using extrapolation. Therefore, it is highly possible for engineers to apply the results of this work to design the dimensions of the device required to control leachate production with greater accuracy.

 

KEYWORDS: Field Capacity, Solid Waste, Leachate, Lysimeter


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