Scenario Analysis on Operation Efficiency for Waste Collection and Transport: A Case Study in Da Nang City, Vietnam

Hong Dang Nguyen, Thi Tuong Vi Le, Vu Chi Mai Tran, Yasuhiro Matsui

Research output: Contribution to journalArticle

Abstract

The authors focused on the major alternatives to waste collection and transport practices used in Da Nang city. GPS devices and a GIS software
were used to survey and analyze the detailed tracking data on 3 current practices; “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 using a detailed operation category: moving forward and backward, waste collection waste, unloading
and other activities. Using multi-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 the door-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.
Original languageEnglish
Article number134
Number of pages13
JournalJournal of Environmental and Social Sciences
Volume5
Issue number1
Publication statusPublished - Jan 12 2018

Keywords

  • Waste collection and transport
  • Operation efficiency
  • GPS
  • GIS
  • Scenario estimation
  • Sensitivity analysis
  • Person-hour

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