Waterworks (3): the coagulation building – slow mixers

The sounds of slow mixers in the coagulation building. The slow mixers consist of eight chambers fitted with two slow agitators with rotation speed regulation. At an appropriate rotation speed the heaviest floc is produced, which then sinks to the bottom of the chamber by gravity. The water flows through a perforated wall into the settling chamber where it undergoes the sedimentation process.

The recording was made at the Rudawa Water Treatment Plant, which is part of Krakow waterworks. The water intake is located on the Rudawa River, the left tributary of the Vistula. The raw water from the intake is subjected to a treatment process which consists of oxidation, coagulation, sedimentation, filtration and disinfection. ZUW Rudawa is one of four treatment plants that provide drinking water for Krakow. Tap water in Krakow is of high quality and good for drinking. Its parameters are monitored on an ongoing basis by the Central Laboratory of Miejskie Przedsiębiorstwo Wodociągów i Kanalizacji in Krakow. ZUW Rudawa produces an average of 22,000 - 28,000 m3 of water per day and supplies about 200,000 inhabitants.

The information comes from: https://zuwrudawa.wkraj.pl/#/64541/0


Sound recording: Monika Widzicka
Photo: Piotr Żabicki