Urban wastewater reclamation for industrial reuse: An LCA case study

The results showed also that in the case of the “water reuse” scenario the indicator water depletion (WD) is −4.39·10−1 m3 per m3 of wastewater treated in Tarragona as compared with 5.74·10−4 m3 in the case of “no reuse” option. From a comparison of these alternatives it may be observed that in the case of the reuse scenario the value is negative which means that there is a net saving of water from nature. This indicator represents a measurement in a life cycle perspective of the effect of wastewater reuse in Spain, the non-potable use of reclaimed water reducing the stress on fresh water supplies.