The water source in Tolna is groundwater from 60 meters deep well. The water contains impurities such as iron, manganese, hydrogen sulphide, and ammonium that must be removed in order to meet the standards of the EU Drinking Water Directive.
|Impurity||Unit||Groundwater in Tolna|
Quality requirements EU Drinking Water Directive
Drinking water quality in Tolna after treatment
EUROWATER has designed, manufactured and installed the water treatment solution in Tolna. The groundwater is treated in pressure filters with selected filter media and atmospheric air. No chemicals are used in this treatment process.
To ensure a safe and reliable production of clean drinking water, the solution in Tolna consists of four pressure filters in parallel operation. Each pressure filter has a capacity of 50 m³/h.
Filtration system with four pressure filters from EUROWATER. Aeration system with two compressors. Air blower for high quality backwash of the filter material. (Photos: Juraj Kalafut © Silhorko-Eurowater)
In Denmark the drinking water quality requirements are even tougher than the requirements in the EU Drinking Water Directive. The source of water is 100 % groundwater. The water treatment method used in Denmark is based on a philosophy using only natural processes such as oxidation and filtration.
A EUROWATER pressure filter is specially designed for drinking water treatment without using chemicals in the treatment process. In a EUROWATER pressure filter the groundwater is oxidized with atmospheric air to aid the filtration process with sufficient filter media - individually designed for the project.
If designed properly, the chemical solution as well as the chemical-free solution will do the job: produce drinking water. However, there are some very clear benefits using only oxidation and filtration for producing drinking water.
The commissioning of the water treatment in Tolna was performed in the beginning of 2012. The status is that the water quality has been very good and meets by far the required standards.