Specialist Group on Use of Macrophytes in Water Pollution ... - IWA
Specialist Group on Use of Macrophytes in Water Pollution ... - IWA
Specialist Group on Use of Macrophytes in Water Pollution ... - IWA
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Municipality <strong>of</strong> Preganziol (Venice)<br />
A new social hous<strong>in</strong>g settlement (240 pe) <strong>in</strong>cludes <strong>in</strong>novative water systems for build<strong>in</strong>gs,<br />
like as water sav<strong>in</strong>g, grey water use, ra<strong>in</strong> water collecti<strong>on</strong> and reuse. Ra<strong>in</strong>water is harvested<br />
from ro<strong>of</strong>s and other surfaces (park<strong>in</strong>g area, …) <strong>in</strong> a separate way and it‘s differently treated<br />
before its reuse.<br />
Grey water is treated by a HF CW (14,5 m 3 /d <strong>in</strong> 232 m 2 ) and then stored for reuse (toilet<br />
flush<strong>in</strong>g and landscap<strong>in</strong>g), together with the harvested and treated ra<strong>in</strong>water. Ra<strong>in</strong>water is<br />
treated <strong>in</strong> a 50m 2 VF CW. The water cycle optimisati<strong>on</strong> is sav<strong>in</strong>g about 9000 m 3 <strong>of</strong> potable<br />
water per year and a 30-35% reducti<strong>on</strong> <strong>of</strong> the discharged wastewater <strong>in</strong> the municipal sewer.<br />
Preganziol is a good example <strong>of</strong> susta<strong>in</strong>able build<strong>in</strong>g and susta<strong>in</strong>able water management.<br />
Natural Systems for Treatment <strong>of</strong> Comb<strong>in</strong>ed Sewage Overflow (Gorla Maggiore,<br />
Capiago Intimiano, Gorg<strong>on</strong>zola – Milan)<br />
This project <strong>in</strong>volves the Lambro, Seveso and Ol<strong>on</strong>a watershed that are <strong>on</strong>e <strong>of</strong> the most<br />
critical areas <strong>of</strong> the country, <strong>in</strong> particular <strong>on</strong> the management <strong>of</strong> waters. This superficial<br />
waters are heavily eutrophicated from comb<strong>in</strong>ed sewer overflows, that <strong>on</strong> <strong>on</strong>e side has deeply<br />
altered the hydraulic answer <strong>of</strong> the territory, <strong>in</strong>creas<strong>in</strong>g the flood peaks, from the other pours<br />
to the rivers dra<strong>in</strong>age water elevates volumes, that c<strong>on</strong>stitute <strong>in</strong> average 40% <strong>of</strong> the river bed<br />
capacity. In comb<strong>in</strong>ed sewer systems an enhanced treatment <strong>of</strong> comb<strong>in</strong>ed sewer overflow<br />
(CSO) is required, when augmented water quality requirements are demanded or<br />
c<strong>on</strong>venti<strong>on</strong>al CSO treatment does not meet envir<strong>on</strong>mental quality standards. C<strong>on</strong>structed<br />
wetlands (CWs) have proved to be a highly effective measure to reduce the ecological impact<br />
<strong>of</strong> comb<strong>in</strong>ed sewer overflows (CSOs) <strong>on</strong> receiv<strong>in</strong>g waters. This project aimed to verify the<br />
design performance <strong>of</strong> <strong>in</strong>novative works (first experience <strong>in</strong> Italy <strong>of</strong> natural systems for the<br />
treatment <strong>of</strong> CSO) from various po<strong>in</strong>ts <strong>of</strong> view: technical scientific, procedural-<br />
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30 <strong>IWA</strong> <str<strong>on</strong>g>Specialist</str<strong>on</strong>g> <str<strong>on</strong>g>Group</str<strong>on</strong>g> <strong>on</strong> <strong>Use</strong> <strong>of</strong> <strong>Macrophytes</strong> <strong>in</strong> <strong>Water</strong> Polluti<strong>on</strong> C<strong>on</strong>trol: Newsletter No. 35
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