| 摘要 |
PURPOSE:To stably and efficiently nitrate and denitrify org. nitrogen or ammoniacal nitrogen in waste water. CONSTITUTION:A pressure aeration tank 5 performing the stirring and aeration of activated sludge under a pressure condition using circulating water and aeration air is provided and an ultrafiltration device 11 separating waste water into sludge and treated water 13 is provided on the way of the piping of circulating water. Aeration air is intermittently sent to inflow waste water to subject the waste water to nitration/denitrification treatment. |
