| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a membrane separation activated sludge treatment method that can prevent the generation of N<SB POS="POST">2</SB>O while reducing energy consumption required for aeration and suppressing the occurrence of fouling. <P>SOLUTION: The method includes: introducing sewage water into an anaerobic tank; decomposing pollutants by reacting the sewage water with anaerobic microorganism in the anaerobic tank; introducing the anaerobically treated water treated in the anaerobic tank into an aerobic tank; aerating the anaerobically treated water by an aerating mechanism under the coexistence of activated sludge containing aerobic microorganism; and decomposing the pollutants in the anaerobic tank by reacting the anaerobically treated water with aerobic microorganism under an aeration atmosphere. The method also includes: separating the anaerobically treated water into solid and liquid by a membrane separation unit provided in the aerobic tank; discharging the treated water filtered by a filtration membrane from the aerobic tank; detecting nitrogen oxide produced in the aerobic tank; and increasing an amount of the anaerobically treated water aerated by the aerating mechanism when the value of detected nitrogen oxide exceeds a threshold value. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
