title: A novel test method to determine the filter material service life of decentralized systems treating runoff from traffic areas.
abstract: In recent years, there has been a significant increase in the development and application of technical decentralized filter systems for the treatment of runoff from traffic areas. However, there are still many uncertainties regarding the service life and the performance of filter materials that are employed in decentralized treatment systems. These filter media are designed to prevent the transport of pollutants into the environment. A novel pilot-scale test method was developed to determine - within a few days - the service lives and long-term removal efficiencies for dissolved heavy metals in stormwater treatment systems. The proposed method consists of several steps including preloading the filter media in a pilot-scale model with copper and zinc by a load of n-1 years of the estimated service life (n). Subsequently, three representative rain events are simulated to evaluate the long-term performance by dissolved copper and zinc during the last year of application. The presented results, which verified the applicability of this method, were obtained for three filter channel systems and six filter shaft systems. The performance of the evaluated systems varied largely for both tested heavy metals and during all three simulated rain events. A validation of the pilot-scale assessment method with field measurements was also performed for two systems. Findings of this study suggest that this novel method does provide a standardized and accurate estimation of service intervals of decentralized treatment systems employing various filter materials. The method also provides regulatory authorities, designers, and operators with an objective basis for performance assessment and supports stormwater managers to make decisions for the installation of such decentralized treatment systems.
authors.affiliation: Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, 85748 Garching, Germany.
authors.forename: Maximilian
authors.initials: M
authors.lastname: Huber
authors.affiliation: Fachgebiet Siedlungswasserwirtschaft und Hydromechanik, Frankfurt University of Applied Sciences, Nibelungenplatz 1, 60318 Frankfurt am Main, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Welker
authors.affiliation: Fachgebiet Siedlungswasserwirtschaft und Hydromechanik, Frankfurt University of Applied Sciences, Nibelungenplatz 1, 60318 Frankfurt am Main, Germany.
authors.forename: Martina
authors.initials: M
authors.lastname: Dierschke
authors.affiliation: Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, 85748 Garching, Germany.
authors.forename: Jörg E
authors.initials: JE
authors.lastname: Drewes
authors.affiliation: Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, 85748 Garching, Germany. Electronic address: b.helmreich@tum.de.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Helmreich
mesh_terms: D003300:Copper / Q000302:isolation & purification; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D019216:Metals, Heavy / Q000302:isolation & purification; D018986:Motor Vehicles; D010865:Pilot Projects; D011891:Rain; D015203:Reproducibility of Results; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*; D015032:Zinc / Q000302:isolation & purification
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D003300:Copper; D015032:Zinc
keywords: Channel system; Copper; Distributed stormwater treatment; Heavy metal; Shaft system; Zinc