Energy Department Metropolitan Autonomous University Azcapotzalco CDMX 02200 Mexico;
Postgraduate Department Occupational Health Safety and Hygiene National School of Medicine and Homeopathy National Polytechnic Institute Ciudad de México CDMX 07320 México;
Basic Sciences Department Metropolitan Autonomous University Azcapotzalco CDMX 02200 Mexico;
Construction HeBui;
Civil Engineering Faculty Michoacán University UMSNH Morelia 58030 Michoacan Mexico;
Energy Department Metropolitan Autonomous University Azcapotzalco CDMX 02200 Mexico;
Secondary treatment; advanced oxidation; heterogeneous photo catalysis; “in line”coagulation; nitrogen compound reduction.;