In the city of Schloss Holte-Stukenbrock, the municipal department of civil engineering and the environment finds it particularly important to transport the accumulated sewage sludge to the waste incineration plant with as small a water content as possible. The first step in the upstream sludge conditioning process is to improve the consistency of the sludge. The process, based on organic flocculants, is accompanied by intensive foaming. It takes place in a deep, narrow shaft and is hardly visible because the filling stream stirs up the surface. A wide metallic ladder keeps the shaft accessible for inspection and maintenance purposes.
For the level transmitter VEGAPULS WL S 61
installed above the shaft, these operating conditions pose no great challenge. It is protected by a flood-proof IP 68 housing, and thanks to its very good signal focusing, it measures right past the reflecting ladder. The foam formation and even the turbulent surface have no effect on the level the measurement.