System for treating wastewater and method for treating wastewater using select infusion sequencing batch process

The present invention is stable and effective in a first anaerobic tank and the second to remove the phosphorus and nitrogen, as that enhance the flow rate adjustment by the selected inlet on the wastewater treatment system, and more particularly, are the anaerobic reaction proceeds respectively to remove the sludge anaerobic; Treated effluent contains, and repeating performing the steps and giving a non-step giving a first intermittent aeration tank and a second intermittent aeration tank to; First sludge cross conveying device for conveying the sludge to the second intermittent aeration tank from the first anaerobic tank; The second sludge cross conveying device for conveying the sludge to the first aeration tank intermittently from the second anaerobic tank; First sludge conveying device for conveying the sludge to the first anaerobic tank from the first intermittent aeration tank; And the second intermittent aeration basin from the second sludge conveying device for conveying the sludge to the first anaerobic tank; relates to a comprising a wastewater treatment system and selection using the same injection continuous batch wastewater treatment method.