Aerated racetrack wetland system for treating wastewater

An aerated wetland system for treating oil refinery wastewater, comprising:

• a main frame includes an entrance and an output opening, wherein the entrance includes sand pebbles, configured to allow the oil refinery wastewater to flow uniformly and with maximum velocity via a racetrack to prevent clogging problems in the aerated wetland system and gradually decreases along the racetrack by increasing the width of wastewater flow path,
• wherein the racetrack comprises;
• an agitated flow pattern with a plurality of baffles, configured to deflect the oil refinery wastewater and create turbulent flow into the oil refinery wastewater along the racetrack;
• at least four intersecting sections with vertexes along a longitudinal axis of the racetrack, wherein at least two intersecting sections include washed soils and an aeration system and other two intersecting sections include washed soils and a plurality of wetland plants, thereby subjecting the oil refinery wastewater to anaerobic and aerobic conditions respectively, along the racetrack to effectively purify and treat volatile and non-volatile compounds in the oil refinery wastewater, and the outlet opening direct out effluent oil refinery wastewater from the aerated wetland system via an effluent device, and
• one or more blowers positioned in the system, configured to enhance oxygen concentration level within the system.