| 摘要 |
PURPOSE: Provided is an advanced wastewater treatment apparatus for recycling treated water after wastewater treatment, and particularly provided is an advanced step aeration system with media (ASAM) for increasing removal efficiency of organic material, nitrogen and phosphorous. CONSTITUTION: The apparatus comprises an anoxic sludge zone(1) having a first media therein for deodorizing, an anaerobic zone(2) to which 0.7-0.8Q of wastewater is input, an aerobic zone(3) having a second microorganism media(13) for increasing organic material, nitrogen and phosphorous removal efficiency and an aerator(6) therein, an anoxic zone(4) to which the remainder of the wastewater is input, a reaeration tank(5) with an aerator(7), an air lift pump(8) and a membrane filter(18) therein for improving nitrogen removal efficiency and reusing the treated water, the final settling zone(9) settling treated water and generating excessive sludge, and a biofilter(16) for filtrating treated water, wherein 0.3-0.5Q of the excessive sludge of the final settling zone(9) is returned to the anoxic sludge zone(1).
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