Assessment of process water quality (depending on the presence of process water systems) in car wash facilities across Germany and the Netherlands
Year: 2024
Type: article
Abstract: ABSTRACT There are around 2,500 car wash lines in Germany, consuming around 30 million m3 of drinking water per year. In view of the increasing scarcity of water, this level of consumption could soon be restricted by law, as it is in some countries. There are only a few systematic studies on process water systems in car wash lines in Middle Europe; we therefore carried out a survey to determine process water quality parameters (COD, turbidity, water hardness, pH, conductivity, dissolved O2, and temperature). Data were collected and analysed from 63 different locations in Germany and the Netherlands. In addition, longitudinal parameters were measured for 1 year at a single state-of-the-art site in Germany. The scatter of the observed values was quite considerable. The average COD in water of car wash sites with biological treatment was found to be significantly lower than in car wash sites working with filter treatment. Overall, the deviation of the pollution parameters was higher than expected. Surprisingly, there is hardly any reliable data on freshwater consumption in the car wash facilities. As most of the long-established facilities do not have a modern water treatment system, freshwater consumption is up to 300 L per car washed.
Source: Water Science & Technology
DOI: 10.2166/wst.2024.300
Authors: Richard Löffler, Holger Evers, Andreas Beyer
Language: English
Subfield: Waste Management and Disposal
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4402128238