Waterworks (10): the chlorination building - chlorine dioxide production generators

Operation of the chlorine dioxide production generators for water disinfection.

A chemical reaction occurs in the generators; as a result of mixing concentrated hydrochloric acid, sodium chlorite and dilution water, chlorine dioxide (ClO2) is produced. It is difficult to use in gaseous form, therefore an aqueous solution is used for disinfection. Chlorine dioxide kills bacteria and viruses found in water, guaranteeing its microbiological safety.

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