Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...
Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...
Systems Analysis of Zaragoza Urban Water - SWITCH - Managing ...
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<strong>Systems</strong> <strong>Analysis</strong> <strong>of</strong> <strong>Zaragoza</strong> UWS<br />
Guillermo Penagos<br />
36%<br />
Direct<br />
Transportation<br />
63%<br />
Electricity<br />
1%<br />
Figure 10. Direct and Indirect CO 2 emissions <strong>of</strong> <strong>Zaragoza</strong>’s UWS (Source: Ministerio de<br />
Industria, Turismo y Comercio de España, 2007),<br />
As result <strong>of</strong> facts described by figures 8 to 10 WWT process is responsible for most<br />
atmospheric emissions (see figure 11).<br />
15%<br />
0%<br />
<strong>Water</strong> supply<br />
Ground water<br />
WWT<br />
85%<br />
Figure 11. CO 2 emissions <strong>of</strong> <strong>Zaragoza</strong>’s UWS per process. Total CO 2 emissions = 23 ton<br />
4.3.3 Heavy metals<br />
Figure 12 shows the heavy metal loads in <strong>Zaragoza</strong> sewage. Zinc (48%) and nickel<br />
(25%) are the most abundant.<br />
37
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