Hitachi, Ltd.

Yoshikatsu Asada

Kenji Baba

Harumi Matsuzaki

Mikio Yoda

Shoji Watanabe

Hayao Yahagi

Naoki Hara

Shunji Mori

Ichiro Enbutsu

Suspended substances, such as active sludge, in a liquor is treated in an apparatus for treating the liquor by predicting a suspension state on the basis of an amount of existing suspended substances in the liquor.

Process for treating suspended substances in liquor

Provided is a daily inspection process for making a daily inspection of a driving system having a main machine and a plurality of auxiliary machines. The driving system is so constructed that the main machine is started only after a plurality of starting conditions including correct functioning of the auxiliary machines are fulfilled. According to the inspection process of the invention, the plurality of starting condition are inspected sequentially in such a manner that, when the failure in one of the starting conditions is detected, the inspection proceeds to the next step after locking the main machine against the start up, so that the plurality of starting conditions are checked sequentially without suspension, whereby all of the failed conditions are detected in a single inspection operation.

Method of inspecting operation of driving system including a main

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Hitachi, Japan

Yoshikatsu Asada