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Process analysis and optimization of solid waste haulage in Enugu Metropolis

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Abstract

The present state of solid waste management in Enugu Metropolis constitutes a major environmental challenge to residents of the city. Hence, this study is aimed at assessing solid waste transportation in Enugu Metropolis and optimizing the process for effective resource utilization. Several field datasets on the characteristics as well as geographical locations of the dumpsters were collected for various locations using GPS navigation device and stopwatch. A total of eight waste collection routes were identified, each with distinct characteristics. The results revealed that the haul distances for the eight routes ranged from 2.53 to 11.1 km, accounting for between 16.43 and 50.57% of the collection route. The actual haul time varied from 0.43 to 1.22 h with an average of 0.75 h. Haul equations developed based on regression approach, yielded R2 values ranging from 0.69 to 0.94 for different days. After the optimization of the haul routes, new routes were found that resulted to the reduction in travel distances ranging from 0 to 64.4% while haul time would thin down to 7 min and 12.4 min of the original values. Insights provided by this study can be used by policymakers for the effective management of solid waste.

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Authors and Affiliations

  1. Department of Civil Engineering, University of Nigeria, Nsukka, Nigeria

    Chidozie C. Nnaji

  2. Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg, South Africa

    Chidozie C. Nnaji

  3. Africa Centre of Excellence for Sustainable Power and Energy Development, University of Nigeria, Nsukka, Nigeria

    Chidozie C. Nnaji

  4. Department of Civil Engineering, University of Cross River State, Calabar, Nigeria

    Nkpa M. Ogarekpe

Authors
  1. Chidozie C. Nnaji
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  2. Nkpa M. Ogarekpe
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Contributions

CN conceptualized the study and wrote the first draft. The data collection and analysis were carried out by CN. NO wrote some sections of the paper. CN and NO revised the paper.

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Correspondence to Nkpa M. Ogarekpe.

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Nnaji, C.C., Ogarekpe, N.M. Process analysis and optimization of solid waste haulage in Enugu Metropolis. J Mater Cycles Waste Manag 26, 620–634 (2024). https://doi.org/10.1007/s10163-023-01864-9

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  • DOI: https://doi.org/10.1007/s10163-023-01864-9

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