Potential for Water and Energy Savings from the Reuse of Washings in a Swimming Pool

Indoor swimming pools are energy- and water-intensive facilities. Advanced technologies enable water recovery and eliminate heat consumption by recirculating water used for filter backwashing. The aim of this article is to assess the water and energy savings resulting from the use of backwash water from swimming pool filters through the implementation of a modern technological system. The results of the analyses allow for an assessment of the benefits depending on the assumptions adopted in the national regulations regarding swimming pools in two neighboring countries: Poland and the Czech Republic. The temperature of the water supply to the swimming pool system has a significant impact on heat consumption, as a 7 °C difference between water temperatures in Poland and the Czech Republic causes a 50% increase in heat consumption. The high efficiency of the recycling systems allows for water savings of up to 30 m3 per day. In the case of pools with a water temperature of 26 °C, the energy savings range from 645 to 967 GJ per year, depending on the fresh water temperature. Implementing the system has enormous benefits in the decarbonization process, reducing CO2 emissions by 80%.