During the month of May 2005, the performances of ACTIDisc (R) process were tested in Castellon de la Plana WWTP (waste water treatment plant), in collaboration with FACSA and Entitat de Sanejament d'Aigues Residuals de la Generalitat Valenciana. The purpose of the analysis was to prove the suitability of ACTIDisc (R) process in wastewater reclamation of the WWTP secondary effluent. The process aimed, mainly, to achieve a low level of suspended solids and turbidity in compliance with the regulations proposal for direct reuse of treated effluents, suggested in 2005 as AEAS guidelines.