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Data and Conveyors

Run time: 01.06.2016 - 31.05.2019
Project management: Prof. Dr.-Ing. Helmut Grüning
Department of Energy - Buildings - Environment
Employees: M.Eng. Christian Schmidt
Andrea Börgermann
Partner: WSW Energie Wasser AG
Bromberger Straße 39
42281 Wuppertal
City Warendorf
Freckenhorster Straße 43
48231 Warendorf
Dr. Pecher AG
clinker path
40699 Erkrath
Financing: Landesamt für Natur, Umwelt und Verbraucherschutz NRW (LANUV)

Project description: Detection of faulty discharges in separation systems and reduction of the resulting water pollution (DETEK-T)

Discharge of wastewater into a water body

Dirty water pipes that have been misconnected to rainwater canals or connections from the dirty water canalisation to the rainwater canalisation (e.g. overflows) lead to ecological water pollution. The extent of these impacts has not yet been determined in detail. In addition to aesthetic impairments, e.g. caused by alluvial hygiene articles in the shore area, odor and algae pollution are also caused by nutrients and nutrients. However, the entry of germs and micropollutants into water bodies is particularly serious. This results in problems such as hygienic restrictions (bathing water quality) and possible pollution of drinking water.


Sensitize for misdirected wires

An exact localization of these misleads is only possible to a limited extent with conventional methods such as channel TV investigations, fogging or tracer additions. Within the scope of the project, innovative techniques for detection and concepts for the subsequent elimination of faulty discharges in separated sewer systems in NRW will be developed.

The research concept is characterised by the following subgoals and measures:

  1. Quantify: Rough determination of the magnitudes of the pollution load input from incorrectly connected wastewater pipes in separation systems for two sample municipalities (Wuppertal and Warendorf)
  2. Determination of the current handling of wrong connections by municipalities
  3. Detect: Investigation and development of techniques and concepts for the detection of faulty discharges.
  4. Eliminate: Develop concrete measures and concepts to eliminate faulty discharges, taking into account possible obstacles to their practical implementation.
  5. Avoid: Documentation in a recommendation for action (guideline), which enables the municipalities in cooperation with the authorities to successively eliminate existing incorrect discharges and to avoid incorrect discharges in the future.
Experimental set-up in the laboratory for hydraulics and urban hydrology


The dirty water with glass fibre cables on the track

Dirt and rainwater have different temperatures. By using fiber optic cables in the rainwater drainage system, false discharges due to temperature differences can be detected. This concept is to be further developed so that a broader application will be possible in the future. A guideline for local authorities is being developed for the state of NRW, which will show concepts for the detection and elimination of faulty discharges.

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