Cost effectiveness of centralised and decentralised storm water treatment

Abstract

As part of a research & development project commissioned by the Land of North Rhine-Westphalia's Ministry for the Environment and Nature Conservation, Agriculture and Consumer Protection (MUNLV) an examination is being carried out of the general possibilities for centralised and decentralised treatment storm water runoff to be discharged into (canalised) receiving waters and the costs ensuing from this. The examination of the different options is being carried out under real conditions, with the Briller Creek (Wuppertal/Germany) and Müggen Creek (Remscheid/Germany) catchment areas being used as models. The range of investigations deals with a comparison between 'decentralised, semicentralised, centralised' storm water treatment, centralised storm water treatment involving a separate sewer and parameter-specific pollution based storm water runoff control. In the framework of the research project each of the variants is to be elaborated and the costs are to be calculated so as to permit a comparison between the different system designs. In particular, the investigations are to take into account the actual requirements to be met by storm water drainage systems involving separate sewage systems.

Design-oriented evaluation of the hydrodynamics in a full-scale combined filter-lamella separator for urban stormwater treatment

“…Due to increasing knowledge of pollutant pathways, new urban stormwater management practices have been developed in recent decades, which are referred to throughout the literature as best management practices (BMP), stormwater control measures (SCM) or low impact development (LID) (Fletcher et al 2015). These include compact treatment devices integrated into the underground stormwater sewer system, which treat stormwater in a decentralized or semicentralized manner and often combine a preliminary sedimentation with an upward flow filtration in a single unit (Gruening et al 2011). This combination extends the longevity of a filter by retaining coarse particles in the sedimentation stage (Herr & Sansalone 2015) and is thus also a promising approach for the application on a central scale (Grüning & Schmitz 2018).…”