Saving possibilities in the sludge process, case story Tampere Water

Tisdag 27/9 kl. 14.30-14.55

Tampere Water recently installed several total solids measurements devices and a sludge dewatering control package at its Viinkanlahti wastewater treatment plant in Tampere, Finland.

After the start-up at Viinkanlahti, immediate results were visible, from savings in pumping energy to improved anaerobic digestion and subsequent sludge dewatering. In addition to improved solids control, the measurements now also provide a valuable insight to plant operation, with real-time solds information replacing infrequent laboratory analysis. Maintenance Engineer Ari Oksanen comments: "We can now see process parameters in kilos rather than cubic meters, which is a great help in optimizing the different stages of treatment."

The biological and chemical wastewater treatment in Viinkanlahti, is based on activated sludge process coupled with phosphorus precipitation by ferric sulfate. The process consists of screening, grit removal, primary sedimentation, aeration and secondary sedimentation. Wastewater sludge is digested in anaerobic digesters after which the sludge is dewatered by centrifuge. Biogas from the digester is used to generate electrical energy and heating for the plant.

Arrangör: Endress + Hauser

Föredragshållare: Johanna Luomanen, Operational engineer, Tammerfors Vatten