This work shows the experimental results of the application of this
treatment to real RIA wastes with different activity levels. In previous
work, permeoselective performance of UF and RO membranes during
experiments was assessed. It was concluded that membrane performance
had been excellent, especially with regard to activity removal,
showing percentages higher than 90% in any RO pass [30]. As a result
of these conclusions, this work studies the results of experiments with
the shortest and the longest storage time, to define RIA waste treatment
with the aim of preserving storage capacity of the hospital and reducing
final waste volume. Results are assessed from the point of view of activity
removal for defining the number of RO passes required in each case
to obtain a permeate suitable for discharge. Characteristics of final concentrate
are also shown. Finally, the most suitable treatment protocol
for RIA wastes is defined.