Water Protection

From fresh water to process water and back

Much like energy and raw materials, water is also a key factor for chemical production and therefore for the GENDORF Chemical Park. Every day, more than 100,000 m³ are taken from wells and the Alz river, primarily used as cooling water during the production process and then fed back into the Alz river. As a chemical park surrounded by greenery, we feel obligated to treat water and waste water with particular care. In the past, large sums have therefore been invested into water protection, for instance into enormous retention basins, into an improved biological treatment capability with soil aeration, and into the construction of a preliminary sedimentation plant.
All companies located here jointly attempt to consume as little of the life-giving resource water as possible. Particularly large amounts of water are used for cooling requirements for production and energy generation. However, this water is not repeatedly drawn from the Alz river, but is instead recycled in a closed loop. For this purpose, the water is cooled in heat exchangers (cooling towers) and then reused. It is therefore not contaminated and only consumed in small volumes. Today, we cover more than 80 percent of our cooling water needs with these closed loops.
All waste water from the entire chemical park is fed into the central waste water treatment plant. It has a capacity that corresponds to the waste water volume of a large city with roughly 120,000 residents. The waste water is treated mechanically, chemically, and biologically in several steps. The entire plant is designed to sustain the waste water treatment even when individual apparatus', basins, etc. malfunction. An extensive system of retention and buffering facilities, channels, and monitoring stations ensure that irregularities are identified as quickly as possible and that contaminated waste water can be held back.

Like other chemical companies in the region, the GENDORF Chemical Park uses the River Alz as a supplier of cooling and process water. 90 percent of the water eventually flows back into the Alz. Prior to this, it undergoes a careful check for harmful substances. In order to compensate for time delays in the measurement technology for the analysis of cooling and rainwater, InfraServ Gendorf invested in a clever solution: delay basins.


Each of the tanks, which are around 29 metres long and approx. 10 metres wide, has a labyrinth-like design that extends the residence time of the cooling and rainwater, thus allowing sufficient time for adequate testing for pollutants.  This makes it possible to safely divert the water to the central water retention system (ZWR) when contaminants are detected and to retain it there.


The delay structures are an innovation made by InfraServ Gendorf. In their form and function, the basins are a completely new development, taking into account the experience gained from plants implemented at other locations. Together with the equipment manufacturer, the analysis technology has been improved in such a way that the required minimum retention time of the water is among the best in this class. In addition, the water flow in the basins was optimised in terms of flow in cooperation with the Technical University of Munich.