Decentralised Alternative Water Sources, Closed Water Loops And Nature-based Solutions: Legislative And Institutional Analyses.

This prospective study was critically assessed the EU directives, regulations and standards to reveal the barriers, pros and cons for integration of nature-based solutions within the concept of closed water loops approach developed by HYDROUSA project. The project aim to solve issues related to the water supply, the wastewater problem, the biodiversity and nutrient loss, by means of the implementation of six innovative technology solutions. In this work, proposed technologies were assessed to evaluate how their implementation is supported by the European Legislative Framework and if constrains or obstacles are detected for the replicability of the technologies. Main results of the Legislative analysis highlighted that no relevant barriers prevent the implementation of the HYDROUSA technologies in the European context and thus the replicability can be studied at further national level.