Quality Assessment of Sludge from Filter Backwash Water in Swimming Pool Facilities

Swimming pools are examples of water-intensive facilities, where solutions for reducing economic and environmental costs searched with increased frequency. One the supporting savings is recovery water from wastewater, including backwash obtained while rinsing filter bed. The study objective was qualitative quantitative assessment post-coagulation sludges, main pollutant found in washings. During analyses, sedimentation capabilities sludges performed (gravitationally), particle size distribution assessed (particle analyser) phytotoxicity use plant indicators short-term tests (Lemna minor, Lepidium sativum, Sinapis alba, Raphanus sativus). samples were collected two independent circulations, which differed terms capacity type coagulant used. tested characterized by high content total suspended solids: Circuit 1 251 to 128 mg/L, 2 489 228 mg/L. However, processes enabled significant separation sludges. hydrolyzed contributed improvement Despite fact that many low sludge concentrations favored stimulation growth, can constitute a hazard particularly long-term perspective.