APOC technology is currently validated at demonstration level in operational environment (TRL7) (APOC demo plant of 5 m3/d treatment capacity in Blanca Wastewater Treatment Plant, Murcia, Spain), while two additional APOC demo plants of 5-15 m3/d treatment capacity will be installed in Lebanon (Tripoli, Deddeh Koura) and Tunisia (Bent Saidane) by end 2022 and mid-2023, respectively.