What's the difference between Waste Water Reclamation and Waste Water Reuse?
Water reclamation is the process of capturing, transporting and treating water so it can be be reused, particularly if the water is contaminated. Depending on the type of contamination treatment facilities can be a processing plant or a specially constructed/adapted system of biological wetlands with a slow flow of water through them.

Re-using water is using water more than once regardless of whether it has been treated or not. For waste water to be reused it must first be reclaimed and treated.