| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sewage treatment device by which the precision in detecting the MLSS (suspended solid-mixed liq. in an aeration tank) concn. is not lowered and with the structure simplified and the maintenance and inspection facilitated. SOLUTION: The sewage treatment device D is provided with a flow control tank 1 and an aeration tank 2. A filter membrane device 4 is furnished in the center in the aeration tank 2. The aeration tank 2 is supported by the four legs 16 fixed to the four corners of the lower face. A metallic block 17 is attached to one of the supporting legs 16. One rectangular thin-sheet strain gage 18 is attached to the center of the lower face of the upper wall of the block 17 and extended in the longitudinal direction of the upper wall of the block 17. A change in the MLSS concn. in the activated sludge-mixed liq. in the aeration tank 2 is determined by the strain gage 18.</p> |
