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Sustainability 2017, 9, 106 6 of 19

Mobilità) bus depot, so this location can be a potential site for the installation of the biomass power
plant and hydrogen production.
Sustainability 2017, 9, 106 6 of 19

Figure 5. Culture distribution in the territory of Trapani.
Figure 5. Culture distribution in the territory of Trapani.
However, since the availability of biomass in the Trapani area is not enough to cover the demand
However, since the availability of biomass in the Trapani area is not enough to cover the demand
of the power plant, it will have to accept to increase the radius of the area of biomass interception.
of the power plant, it will have to accept to increase the radius of the area of biomass interception.
For this reason, the analysis is extended to the province of Trapani.
For this reason, the analysis is extended to the province of Trapani.
In order to respect the conditions for the identification of the biomass harvesting area and to
In order to respect the conditions for the identification of the biomass harvesting area and to
contain the collection and transportation costs, the analysis is conducted considering the available
contain the collection and transportation costs, the analysis is conducted considering the available
resources in a radius not more than 70 km from the potential site of the power plant.
resources in a radius not more than 70 km from the potential site of the power plant.
Table 3 reports the available dry biomass residue in the province of Trapani. This area is divided
Table 3 reports the available dry biomass residue in the province of Trapani. This area is divided
in concentric zones, with a step of 10 km and the center fixed in the location of the ATM bus depot,
in concentric zones, with a step of 10 km and the center fixed in the location of the ATM bus depot, as
as shown in Figure 6. The map shows a heterogeneous mix of crops (olive, vineyard and straw) within
shown in Figure 6. The map shows a heterogeneous mix of crops (olive, vineyard and straw) within a
a radius of 10 km, rather than vineyards and extensive cultivations that are more widespread. The
radius of 10 km, rather than vineyards and extensive cultivations that are more widespread. The major
major crops of olives are concentrated in the region having a radius ranging between 40 and 50 km.
crops of olives are concentrated in the region having a radius ranging between 40 and 50 km.
Figure 7 reports the available biomass resource as a function of the distance from the ATM bus
depot. Fixing the fraction of collected biomass to 50%, the biomass demand from extensive cultivation
Table 3. Available dry residues in Trapani province, by type of cultivation.
can be satisfied with a collection radius ranging between 5 and 10 km, while the biomass demand
Available Dry Biomass Residue [t/Year]
from olives and vineyards cropping can be satisfied with a collecting radius ranging between 15 and
Distance [km]
20 km, as shown in Figure 8. Extensive Cultivations Olives Vineyards
10 17,960.94 3419.84 3782.56
2232.81
17,312.36
20
49,686.60
Table 3. Available dry residues in Trapani province, by type of cultivation.
30 50,465.28 2424.83 27,370.39
Available Dry Biomass Residue [t/Year] 35,798.84
40 55,058.61 3308.38
50 Distance [km] 33,338.85 12,020.64 20,569.28
Extensive Cultivations Olives Vineyards
60 10,155.51 1677.83 3940.85
10 17,960.94 3419.84 3782.56
20 49,686.60 2232.81 17,312.36
30 50,465.28 2424.83 27,370.39
40 55,058.61 3308.38 35,798.84
50 33,338.85 12,020.64 20,569.28
60 10,155.51 1677.83 3940.85