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3.6 Proposed Reverse Logistics System’s Estimated Cost
There is a need to structure the collection points and the truck with appropriate
containers for the storage of lamps. An initial investment is essential for the purchase
of these containers for each collection point and for the truck. In order to estimate the cost of this reverse logistics system, the initial investment is determined
by the purchase value of these containers. For monthly costs, labor, logistics,
decontamination and lamp recycling costs are considered.
Manpower was established based on avoiding work overload and idleness. For
this, an amount considered ideal for drivers and recyclable material collectors was
raised.
For the logistical cost, fuel, maintenance, oil and tire changes were considered.
Finally, the decontamination and recycling process has a fixed price for each
fluorescent lamp.
4 Results and Discussions
To be structured and proposed the collection system, it was essential to divide the
study into two parts. In the first part, the data of the municipality were collected,
in Sect. 4.1. In the second part, the entire reverse logistics system was proposed,
according to Sect. 4.2
4.1 Estimated Consumption of Lamps
The measurement of the built area of each region, performed using the Google Earth
Pro software, is shown in Table 1. The residential area of the city is approximately
14.97 km
2 .
With data referring to the demographic census carried out in 2016 by IBGE, a
value of 4011.51 inhabitants/km
2 was found for the new relative population (IBGE
2016).
According to the National Household Sample Survey (PNAD) conducted in 2015
by IBGE, the southern region of Brazil has an average of 2.8 residents per household
(IBGE 2015a, b). Table 1 shows the estimated number of houses in each region.
Based on the structure of a popular home, six were considered as the average
number of rooms per household. According to the manufacturers, the fluorescent
lamp has a useful life of 10,000 h. For a lamp that stays on for an average of six
hours a day, it is estimated to last for 4 years and 7 months.
Table 1 shows the number of lamps discarded monthly.
Once the quantity of discarded lamps was estimated and, the division of the
municipality into regions, it was surveyed which are the regions with the greatest
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