Waste Water Treatment

Applying Membrane Processes in the Treatment of Industrial Waste Water


Eisenmann ultrafiltration plant for emulsion splittingEisenmann develops and builds made-to-measure facilities for the treatment of industrial waste water by means of membrane processes. These are used for splitting emulsions, removing paint pigments or tensides, and for desalination. 

Eisenmann employs membrane processes in a wide variety of applications. In the automotive and metal industries, for example, ultrafiltration is mainly used for emulsion splitting. Waste water produced by surface degreasing contains greases and oils that may be easily removed from water by means of membrane processes.

Membrane filtration is also used to treat paint waste water. Pigments can be effectively concentrated via ultrafiltration, producing clean filtrate. In some instances, pigments can even be recovered from the concentrate.

Combined ultra- and nanofiltration for the treatment of printing ink waste water

One application of nanofiltration is the recovery of tensides from degreasing baths. The tensides are concentrated by this method and can be returned to the degreasing bath in order to conserve resources. 

Industrial-scale reverse osmosis is primarily used to produce deionized (DI) water, which is required in a large number of industrial processes. Reverse osmosis is also employed for treating boiler feed water and seawater

Membrane processes are also used to treat waste water in advance of physical/chemical treatment methods. A combination of different membrane processes can be used to treat more highly contaminated waste water, such as residues from biogas plants or printing ink waste water.

Test Plants

Eisenmann operates test plants for waste water treatment. We use them not only to optimize or develop our own products but also to resolve problems for our customers or for trials at the customer site. Talk to us!