NEWS > Green spaces treat leachates with constructed Wetlands

Alberto López Burzaco has been working with Silvia Burés (Buresinnova) and Oriol Marfà (IRTA) to develop a Cleanleach application to clean leachates in small spaces like green walls and green roofs. On October 2015 he presented this work as his final project on Bachelor's degree in Agricultural Environmental and Landscape Engineering, at the Politechnical University of Catalonia.


The world's cities are becoming increasingly congested and polluted. Urban green spaces provide a wide range of ecosystem services that could help creating more attractive spaces and improving life in our cities. In the same line, a new trend to vegetate urban spaces is becoming very popular, implementing green walls, green roofs, urban orchards, etc. When we irrigate these green spaces, we generate a surplus of water, which goes through the root zone to outside the crop system, as a leachate output. Leachates normally contain a high proportion of nutrient pollutants that could provoke a big impact in our environments. For this reason, this study will try to evaluate the availability to use constructed wetland technologies in water treatment, concretely, leachates produced in production nurseries and urban green spaces. In the experimental part of this study, four modular units with four types of culture modalities will be constructed in order to collect and treat their leachates. The four typologies of this study will be, on one-hand, two modalities of green urban spaces (Aromatic green roof and orchard green roof) and, on the other hand, two modalities of nursery crop system (growing bag's culture and container crop). To treat their leachates, these 4 units will have integrated the CLEANLEACH technology. This treatment technology is based into two principal processes: To collect and filter leachates by a slow horizontal sand filter and to purify them by using horizontal subsurface flow wetland (HSSF).


More information about the system at Buresinnova website


Cleanleach Project