| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a waste liquid treatment method excellent in the volume reducing efficiency of the excess sludge discharged when a nitrogen-containing waste liquid is treated, and a waste liquid treatment apparatus. <P>SOLUTION: The waste liquid treatment apparatus is equipped with an intermittent aeration tank 40 for repeating aeration and the stop of aeration, a liquid storage tank 50 for storing the treated liquid treated in the intermittent aeration tank 40, the filter film 80, on which a photocatalyst is supported, arranged between the intermittent aeration tank 40 and the liquid storage tank 50 so as to filter the treated liquid in the intermittent aeration tank 40 to introduce the obtained filtrate into the liquid storage tank 50, and the ultraviolet irradiation device 100 arranged in the liquid storage tank 50 so as to irradiate the filter film 80 with ultraviolet rays from the side of the liquid storage tank 50. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
