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How a commercial port cut
stormwater pollution by over 75%
Municipal and Industrial Stormwater
Situation
Pasaia, in northern Spain, is a
busy commercial port and a key
link in the supply chain for iron,
steel and automobiles.
Image © Samu
Problem
Like any port, Pasaia suffers
from pollution, particularly that
conveyed by surface water.
Problem
Surface water
pollutants flow
from the port
into the estuary
of the Oiartzun
river.
Solution
Urgarbi proposed a solution:
 Analyse the stormwater
 Test treatment devices
 Conceptualise a stormwater
treatment solution
Solution
Urgarbi conducted analysis of
stormwater discharges into the
estuary over a period of more
than eight months.
Solution
The stormwater contained suspended
solids and environmentally damaging
metals such as iron, zinc and lead.
Solution
Urgarbi passed
the stormwater
through mobile
Downstream
Defender® and
Up-Flo® Filter
stormwater
treatment units
Outcome
The stormwater treatment units
reduced pollution in stormwater
discharge by between 78% and 90%.
Influent Effluent> Influent Effluent> Influent Effluent>
TSS
85%
553
mg/L
Test results
Iron Lead Zinc
83
mg/L
58.2
μg/L
5.8
μg/L
83%
589
mg/L
90%
100
mg/L
3.3
mg/L
78%
0.7
mg/L
Summary
Real-world testing
proved that the
Downstream Defender®
and Up-Flo® Filter
systems effectively
capture stormwater
pollution – protecting
the environment even
in challenging
industrial areas.
Find out more
Visit the Downstream
Defender® product
page
Visit the Up-Flo®
Filter product page
Visit urgarbi.eu
Urgarbi are our distribution
partner in Spain
Visit product page
Visit urgarbi.eu
Visit product page

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How a commercial port cut stormwater pollution by over 75%