Customer case:

Online total solids measurement is a winner

Dec 21, 2018

Energy savings and lower polymer costs in sludge treatment are among the benefits gained with Valmet Total Solids Measurement (Valmet TS) at Kajaanin Vesi in Finland. Kajaanin Vesi is a municipal water utility owned by the town on Kajaani in the Kainuu region of Finland. The plant treats about 4 million cubic meters of wastewater annually. In 2012–2013, the plant modernized its sludge treatment facility and had four Valmet TS units installed in the process. This reliable total solids measurement solution, based on microwave technology, is suitable for all wastewater sludge treatment applications in the range of 0–40% total solids.

Marko Kovalainen from Kajaanin Vesi
Earlier, we observed the situation only visually. This meant we could not see the situation in the sludge cones of the primary clarifiers and did not know the sludge quality without laboratory measurements. Now the online measurement data is stored in a database, enabling us to check it and continuously know the total solids content of the sludge at every process stage.
Marko Kovalainen, Operations Manager at Kajaanin Vesi


Location Kajaani, Finland
Customer challenge

Only visual observations to measure the situation


Valmet Total Solids Measurement (Valmet TS)


Energy savings and lower polymer costs in sludge treatment.

Better control of the process and excessive pumping avoided when the total solids content is too low after primary clarifiers. Valmet TS informs the sludge solids amount and indicates how long to pump. Lower need for pumping consequently results in lower energy consumption.

Keywords Wastewater, Automation, Europe