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Drainage Channel for Petrol Station

Filtering fuel residues and mineral oils

In addition to rainwater, a major challenge in the drainage of petrol stations is the presence of fuel residues such as petrol, diesel or oil, which can enter the wastewater and cause environmental damage. It is therefore essential that drainage channels are not only resistant to frost and de-icing salt, but also to mineral oils. To filter mineral oils, petrol and diesel fuels out of the water as effectively as possible, light liquid separators – also known as oil separators – are used. These separators separate the harmful substances from the wastewater, as they are lighter than water due to their lower density. Thanks to the principle of coalescence, even the smallest oil particles are captured, enabling a purification efficiency of up to 5 mg/l.

Example: A petrol station with a slope leading into a drainage channel connected to an oil separator.

Heavy-duty drainage channels

Another aspect to be taken into account concerns the considerable loads encountered at petrol stations. Tanker lorries, delivery vehicles and other heavy machinery regularly have to manoeuvre on petrol station premises. It is therefore crucial that the drainage channels are robust and heavy-duty in order to withstand these challenges. Depending on the expected loads and frequency of use, it is recommended that drainage channels be selected from classes D400 (up to 40 t) to F900 (up to 90 t) in accordance with DIN EN 1433. In addition to the maximum load-bearing capacity, uneven loads must also be taken into account, as these can place additional significant strain on the channel material.