| 摘要 |
PROBLEM TO BE SOLVED: To enhance concentration measuring accuracy by removing the conductivity of sewage when the concentration of sludge is calculated from measured data. SOLUTION: A sewage passing groove 20 is formed to the member 14 provided to the leading end part of a high frequency window part 13 and a part of the high frequency window part 13 is exposed to the sewage passing groove 20 and microwaves are emitted to the interior of a sludge transport pipe from the exposed part and the microwaves reflected from the boundary surface of a sludge mixed liquid are received by an antenna from the exposed part through the high frequency window part 13. Thereafter, the microwaves are converted to the concentration of sludge through a microwave transmitter-receiver and a sludge densistomer converter and the concentration of sludge is displayed on a sludge densitometer. The sewage passing groove 20 is arranged in the sewage flowing direction so as to facilitate the passage of the sewage flowing through the sludge transport pipe.
|
