The Study of Possibilities for Reuse of Washings from Swimming Pool Circulation Systems

Abstract

Swimming pools are very expensive, in terms of operation, sports facilities. Therefore, investors and managers of these facilities are looking for methods of reducing the costs of their use. One of the proposed methods is the managing of washings previously discharged to the sanitary sewage system. The assessment of possibilities for reuse of washings from swimming pool filtration system is based on the limits of basic indicators of pollutants in wastewater discharged to water and soil (temperature, pH, TSS, BOD5, COD, TN, TP, free chlorine). The conducted research of washings quality from 26 tested swimming pools have shown that washings quality is dependent on the operating conditions of the pool circuit, including the filter cycle duration and types of filter bed. A direct discharge to water or soil may be impossible due to excessive amounts of total suspended solids (above 35 mg/dm 3 ) and free chlorine concentration (above 0.2 mg Cl2/dm 3 ). However, the quality of supernatant water of washings subjected to sedimentation in the laboratory shows that the washings are suitable for reuse. The installation of settling tanks in swimming pool facilities could relieve the sewage systems and allow for the discharge of supernatant water to surface waters or for the irrigation of green areas in an environmentally friendly way.

The Reuse of Washings from Pool Filtration Plants After the use of Simple Purification Processes

“…As regards the possibility of managing the washings from swimming pool facilities, it is important that this regulation implements the European Parliament and Council Directives of 2006 on the protection of groundwater against pollution and deterioration [16], of 2008 on environmental quality standards in the field of water policy [17] and of 2010 on industrial emissions [18]. Based on own research experience [9,10] and literature review [19][20][21][22], the following parameters determining the possibility of reuse of washings from filtration swimming pool systems were considered: pH, temperature, total nitrogen (TN), total phosphorus (TP), chemical oxygen demand (COD), five-day biochemical oxygen demand (BOD 5 ), free chlorine, chlorides, aluminum, sulfates, total suspended solids (TSS) and turbidity. The samples were collected and marked in accordance with applicable standards and methods [23][24][25].…”

“…COD, TP, TN free chlorine, chlorides and sulfates were measured using the spectrophotometer DR5000 UV/VIS and BOD 5 was measured using the Oxi Top ® OC 100. The preliminary studies have shown that presence of TSS and too high concentrations of free chlorine are the main impurities that make the direct management of washings impossible [9,10]. For this reason, an attempt was made to reduce the content of suspensions in washings using simple processes, i.e.…”

Contemporary aspects in the assessment of quality and treatment of swimming pool water

“…Introducing these solutions to swimming pool water treatment systems allows to reduce the amount of chlorine that is added at the final stage of the disinfection process [17]. This, in turn, allows to lower the saturation of chloro-nitrogen compounds that cause allergies, irritation of upper respiratory and digestive system, and which are also mutagenic and responsible for the characteristic unpleasant smell of swimming pool water [18][19][20].…”

Toxicology Classification of Pool Water Quality in Relation to Selected Pollutant Fractions Present in Washings Samples

“…The subject of the study was the washings collected independently of the three water treatment systems-a toddler's pool, a swimming pool, and a hot tub. The washings were selected on the basis of preliminary tests due to the large variation in the quality and quantity of pollutants present in them, which also circulate throughout the pool water treatment systems [18]. The washing samples were collected twice for each of the presented types of pools.…”