Page 65 - Implementation of ITU-T international standards for sustainable management of waste electrical and electronic equipment: The path to a circular economy in Costa Rica

Implementation of ITU-T international standards for sustainable management of waste
electrical and electronic equipment: The path to a circular economy in Costa Rica

Figure 37 - Representativeness of importers samples in the surveys

3.6.1.3 WEEE generation projections for 2020-2030

Annual WEEE generation by tracer between 2020 and 2030 was projected applying a dynamic
model. The estimation is based on products ages, using imports and the average lifetime of
EEE as inputs.

The following considerations were taken into account for modelling future flows:
– EEE imports estimates for 2021–2030 were made using average annual growths. This
annual growth was obtained from imports statistics from 2007 to 2020
– Average lifetimes reported by importers in the survey were used (Table 3). Due to the
differences between estimated weights for Costa Rica and those reported for TVs and
CRT monitors, it was decided to use the information from the Global E-waste Observatory
- 2020: Quantities, flows and the circular economy potential.
– It was assumed that EEE imports in a particular year becomes WEEE following a normal
distribution probability. Figure 38 shows the accumulative curves of generated WEEE with
respect to the ingress year into the market of each tracer’s EEE.
– Years 2008–2020 are used to calibrate the model. WEEE projections from 2021 to 2030
are elaborated using EEE import projections for the period 2021–2030.

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