Within the water treatement the Zurich-based water supply changed the additive for neutralisation from lime to soda. After delivery the mineral salt is filled with a compressor into two 80 m³ storage silos.

Venting of the silos during the loading process is carried out via a pipe system with dedusting filter type Infa-Jet AJN. This filter replaces firstly one of two aged dedusting units.

For designing the pocket filter a volume flow of 1,200 m³/h and a dust load of 5-10 g/m³ were considered.

Infastaub was responsible for dismantling the old filter unit as well as for mounting and commissioning of the new one.