Scenario Analysis on Operation Efficiency for Waste Collection and Transport: A Case Study in Da Nang City, Vietnam
Journal Title: Journal of Environmental and Social Sciences - Year 2018, Vol 5, Issue 1
Abstract
The authors focused on the major alternatives towaste collection and transport practices used in Da Nang city. GPS devices and a GIS software were usedto survey andanalyze the detailed tracking data on 3 currentpractices; “Door-to-door collection by tricycle and transport by truck”, “Door-to-door collection and transport by truck”, and “Fixed time dustbin collection and transport by truck”.The operation efficiency indicators, such as unit operation time, person-hours/t and operation velocity were calculated usingadetailed operation category: moving forward and backward, waste collection waste, unloading and other activities. Usingmulti-regression analysis, the authors estimated the unit loading time and the unit waste amount for 4 types of containers, 240-L dustbin, 280-L dustbin, 660-L dustbin and Handcart. Using scenario analysis in Hoa Cuong Nam ward in the Hai Chau district, the operation efficiency of “Door-to-door collection by was 4.39 person-hours/t, which was lowest among the current 3 practices, and that of “Door-to-door collection and transport by truck” was 3.70 person-hours/t. “Fixed time dustbin collection and transport by truck” achieved the highest efficiency of 2.15 person-hours, which was less than half of “Door-to-door collection and transport by truck”. The operation efficiency of a separate collection of bio-waste by plastic bag was 3.49 person-hours/t. It was better than thedoor-to-door collection scenarios, which means it would be a feasible alternative that can replace door-to-door collection practices. The authors also conducted sensitivity analysis to clarify the impacts of policy factors such as truck capacity, collection frequency, and separation rate of bio-waste. The variation range of efficiency by collection frequency was larger than the range by truck capacity. The authors also found some conditions for the separate collection of bio-waste by plastic bag with better efficiencies than “Fixed time dustbin collection and transport by truck”, e.g., “7 times per week for bio-waste and once per week for other waste”. The variation range of efficiency by separation rate was largest among the influence factors considered in this study.
Authors and Affiliations
Yasuhiro Matsui
Keywords
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