Alera starting conference. UPC. Constructed wetlands.
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CONSTRUCTED WETLANDS AS NATURE BASED SOLUTION FOR RESTORATION AND PROVISION OF SERVICES A CASE STUDY IN GRANOLLERS, BARCELONA Joan García y Maria Solé (Universitat Politècnica de Catalunya- BarcelonaTech, Spain) Jornada de llançament del projecte ALERA Granollers, 29 i 30 d’abril de 2015
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Transcript of Alera starting conference. UPC. Constructed wetlands.
CONSTRUCTED WETLANDS AS NATURE BASED SOLUTION FOR
RESTORATION AND PROVISION OF SERVICESA CASE STUDY IN GRANOLLERS, BARCELONA
Joan García y Maria Solé (Universitat Politècnica de Catalunya-BarcelonaTech, Spain)
Jornada de llançament del projecte ALERAGranollers, 29 i 30 d’abril de 2015
www.gemma.upc.edu
https://www.youtube.com/watch?v=f3NEWb06jzo
http://gemma.upc.edu/
THE CONSTRUCTED WETLAND IN CAN CABANYES, GRANOLLERS
Barcelona
Granollers(population 60,000)
DESCRIPTION OF THE PROBLEM
• Can Cabanyes is a highly human-impacted area near the river
Congost in the municipality of Granollers.
• At the beginning of the 2000 in this area there were:
1. Old landfill
2. Uncontrolled orchards
3. Wastewater treatment plant
4. Solid waste treatment plant
5. Industrial park
6. Highway AP7
7. Circuit of Catalonia
8. River channeled
The city can not take advantage of the potential services that could be obtained
THE PROPOSAL • Clean up and restore the river environment with a series of
measures which can reconcile enviromental improvement
with the use of the area (ecosystem services)
• One of the measures was to build a 1 he constructed wetland
which is fed with the effluent of the Granollers wastewater
treatment plant
• Project leaded by Granollers city council and collaboration
GEMMA group (UPC). Finnancing source: city council and
ERDF (EU)
• Started operation in 2003; Construction: 72,000 €
• Different habitats
• 2 plant species (cattail and reed)
1. Shallow planted zones2. Island3. Deep unplanted zones
Effluent Influent
Section view
Plan viewTHE WETLAND PROJECT
El proyecto2002 THE WETLAND PROJECT
El proyecto2003 THE WETLAND PROJECT
El proyecto2006 THE WETLAND PROJECT
El proyectoEl proyecto2006 THE WETLAND PROJECT
El proyectoEl proyecto2008 THE WETLAND PROJECT
El proyectoEl proyectoSUPPORTING SERVICES: IMPROVE AND RESTORE HABITATS
• More than 170 plant species
• Increase in populations of reptiles, birds and mammals
• Amphibians pond
El proyectoEl proyectoSUPPORTING SERVICES: IMPROVE AND RESTORE HABITATS
Newspaper “El 9 nou“ 21/05/2010
El proyectoEl proyectoSUPPORTING SERVICES: WATER QUALITY IMPROVEMENT
2004 2007
2010
2013
Flow, m3/d
90-120
120-250
270-330
270-390
TSS, mg/L
46 13 8 10
NH3, mg N/L
4.5 13 2.7 0.6
FC, ulog/100 mL
1.7 2.0 1.3 1.4
Amm
onia
, mg
N/L
El proyectoEl proyectoCULTURAL SERVICES: RECREATIONAL AND EDUCATIONAL
El proyectoEl proyectoPROVISION SERVICES: WATER FOR IRRIGATION2008
• Reclamation plant and
distribution network;
Construction: 500,000 €
• Finnancing source: City Council &
Catalan Water Agency
• Water for park irrigation
El proyectoEl proyectoFUTURE INNOVATION CHALLENGE: INDUSTRIAL WATER REUSE
• Current uses of effluents mostly based on agricultural irrigation
are slowing the potential of water reuse:
1. Production and consumption points are in different places
2. Agriculture can’t pay for the cost of reclamation and the
projects need subsidy
• The perception problem and concept of “naturalization”
NaturalizationEffluents of a wastewater plant are discharged to an artificial “naturalized” water body, and after a time period this water is reclaimed and distributed. Therefore, the water source is not a wastewater treatment plant, it is a restored ecosystem where natural physical, chemical and biological reactions improve the water quality to the point that it is a “new” water
El proyectoEl proyectoTHE PROJECT WHERE WE CAN TACKLE THIS INNOVATION
Distribution network Industrial water consumption
Industrial sectors
El proyectoEl proyectoREFERENCES ON THE WETLAND SYSTEM
• García, J. y Domingo, V. (2006). Reutilización de aguas depuradas para usos ambientales en Granollers. Tenología del Agua 263, 62-68.
• Matamoros, V., García, J. and Bayona, J.M. (2008). Organic micropollutant removal in a full-scale surface flow constructed wetland fed with secondary effluent. Water Research 42, 653-660.
• Llorens, E., Matamoros, V., Domingo, V., Bayona J.M. and García, J. (2009). Water quality improvement in a full-scale tertiary constructed wetland: Effects on conventional and specific organic contaminants. Science of the Total Envinronment 407, 2517-2524.
• Alfranca, O., García, J. and Varela, H. (2010). Economic valuation of a created wetland fed with treated wastewater located in a peri-urban park in Catalonia, Spain. Water Science and Technology 63, 891-898.
