主权项 |
1. An apparatus for alternative aeration-effluent wastewater treatment using a ceramic membrane, comprising:
an anaerobic tank for discharging phosphorus (P) contained in influent water and denitrifying nitrite nitrogen and nitrate nitrogen; a first intermittent aeration tank and a second intermittent aeration tank alternately operating under an aerobic condition and an anoxic condition to, under the aerobic condition, convert organic nitrogen and ammoniac nitrogen into nitrite and nitrate nitrogen and allow phosphorus in the influent water to be taken by phosphorus-storing bacteria and to, under the anoxic condition, reduce nitrite and nitrate nitrogen into nitrogen gas; and a first ceramic membrane and a second ceramic membrane respectively provided at the lower portion of the first intermittent aeration tank and the second intermittent aeration tank to produce treated water, wherein the first intermittent aeration tank and the second intermittent aeration tank operate under different conditions, and the influent water discharging from the anaerobic tank is supplied to an intermittent aeration tank operating under the aerobic condition among the first intermittent aeration tank and the second intermittent aeration tank, wherein, in a case where the first intermittent aeration tank is under the aerobic condition and the second intermittent aeration tank is under the anoxic condition, air is injected through the first ceramic membrane into the first intermittent aeration tank so that the first intermittent aeration tank forms an aerobic status, and treated water discharges out through the second ceramic membrane, wherein, in a case where the first intermittent aeration tank is under the aerobic condition and the second intermittent aeration tank is under the anoxic condition, the influent water in the anaerobic tank is supplied to the first intermittent aeration tank, stays in the first intermittent aeration tank and then is supplied to the second intermittent aeration tank, and wherein, in a case where the first intermittent aeration tank is under the anoxic condition and the second intermittent aeration tank is under the aerobic condition, the influent water in the anaerobic tank is supplied to the second intermittent aeration tank, stays in the second intermittent aeration tank and then is supplied to the first intermittent aeration tank. |