Overview
Indirect dischargers are private households as well as commercial and industrial companies that discharge their wastewater into the public sewage system. From there, the wastewater flows into the public sewage treatment plants, where it is purified and discharged into the Rhine.
At the heart of sewage treatment plants are microorganisms - i.e. living organisms. If the microorganisms are damaged by hazardous substances in the wastewater, the wastewater treatment fails.
For this reason, the "Indirect Discharger Monitoring" department at the Civil Engineering Office checks and approves that only those substances are discharged into the sewage system that can also be broken down in the sewage treatment plants.
For all indirect dischargers, compliance with the provisions and limit values of the drainage statutes (see below) is essential.
The focal points of indirect discharger monitoring are
- Advising indirect dischargers on discharge issues
- Wastewater sampling and testing at sewer junctions in the urban area
- Discharges from industrial and commercial operations
- Restaurants, commercial kitchens, canteens - Grease separators
- Condensing boiler systems - Condensates
- Facade cleaning with chemical cleaning agents - Waste water
- Geothermal heating systems - Sludge water from deep boreholes