| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an anaerobic treatment device capable of decomposing organic substances efficiently. <P>SOLUTION: The anaerobic treatment device 1 includes a granule tank 21 having a granule filling layer 21a filled with granules containing acid-producing bacteria and methanogenic bacteria. Waste water including organic substances is supplied from a lower part of the granule tank 21, and treatment water is discharged from an upper part of the granule tank 21 to outside of the granule tank 21. The anaerobic treatment device 1 further includes a stirring device 22 having a rotating shaft 22a extended along the vertical direction of the granule tank 21 and stirring water on the lower side of the granule filling layer 21a in the peripheral direction of the rotating shaft 22a. A stirring region 23 where water is stirred in the peripheral direction by the stirring by the stirring device 22 is formed on the lower side of the granule filling layer 21a. In the stirring region 23, the waste water including the organic substances is supplied to inside of the granule tank 21, and an upward flow region 24 is formed above the stirring region 23. <P>COPYRIGHT: (C)2012,JPO&INPIT |
