11 ENVIRONMENTAL CONTROL APPARATUS, NAMELY (A) MEMBRANE BASED EQUIPMENT FOR PURIFICATION AND/OR RECOVERY OF LIQUID AND (B) WATER TREATMENT APPARATUS COMPRISING REVERSE OSMOSIS MODULES AND SYSTEMS; ULTRAFILTRATION MODULES AND SYSTEMS; ACTIVATED CARBON MODULES; DE-IONIZATION MODULES; OZONATION REACTORS; AND (C) CONTROL APPARATUS FOR THE APPARATUS AND PROCESSES OF OPERATION THEREOF, NAMELY APPARATUS FOR MEASUREMENT AND CONTROL OF ENVIRONMENTAL CHLORINATION, OZONATION, COAGULATION, FLOCCULATION, REVERSE OSMOSIS AND ULTRAFILTRATION