Waste water treatment.

Solutions for the wastewater industry: Trust in our experience in wastewater treatment

As relevant as ever:
The cleaning of wastewater and wastewater neutralisation are key concerns in Germany today. Industrial wastewater treatment and the treatment of wastewater in municipal wastewater treatment plants are therefore becoming increasingly important. The elimination of trace substances and micropollutants from wastewater is an increasingly important topic, alongside issues such as sewage sludge treatment, the neutralisation of mine water and the removal of heavy metals from wastewater. The quality and performance of purification methods play a decisive role here. Wastewater treatment processes are constantly being further developed and allow for ever better water purification. We supply innovative solutions that are used in a wide variety of areas.

Implement the fourth purification stage with us - as one of our core competences

A large number of synthetic residues - from pharmaceuticals, household chemicals and care products, food supplements, etc. - pollute our wastewater. Thanks to advanced analytical methods, these micropollutants can be detected in an increasingly differentiated manner. With the usual technical wastewater treatment processes, some substances cannot be removed in a targeted manner and often only to a small extent, meaning that they end up in the environment. There they are only degraded very slowly or not at all. The effects of such trace substances and the resulting interactions on ecosystems and organisms are currently unforeseeable. In addition to raising public awareness of this issue, the removal of trace substances from wastewater is therefore of crucial importance, based on the precautionary principle.

An established process is the use of activated carbon in treated wastewater, to which the trace substances adsorb. As a cost-intensive resource, the precise dosing of activated carbon is extremely important. We have the plants for the safe storage and dosing of activated carbon, whether PAC (powdered activated carbon) or µGAC (micro-granulated activated carbon).

The sorbents we use

We supply you with innovative plants for wastewater treatment. We use the following sorbents for a wide range of applications:

Hydrated/Burnt Lime


Wastewater that has become acidic as a result of biological treatment requires an alkaline neutralising agent to achieve a neutral pH value. Lime is the most economical.

Sludge stabilisation

Water-containing sludge is stabilised by the water-removing effect of hydration of the lime. This is accompanied by a reduction in volume and an improvement in the physical properties (angle of repose of the sludge).

Sludge hygienisation

The reaction energy generated during hydration of the lime ensures germicidal conditions in the sludge. This reduces odours and pathogens.


Precipitation with lime converts dissolved substances in the water into insoluble compounds. This is done by adding suitable chemicals. This enables the removal of metal compounds and inorganic salts from the wastewater.

Alkalisation using milk of lime as a precursor to ammonia stripping

The stripping process is one of the methods used to recover ammonia from acidic wastewater. Milk of lime is required here to raise the pH value to approx. 11.

Powdered Activated Carbon

Elimination of trace substances

Powdered activated carbon has a particularly high specific surface area. It is therefore used for the separation of anthropogenic residues in wastewater treatment. Its use is becoming increasingly important in this context, as the so-called fourth purification stage with regard to sewage treatment plants is also becoming more and more relevant.


Industrial wastewater, especially in the textile dyeing industry, often contains dissolved, finely dispersed colour particles. These are removed by adsorbents such as powdered activated carbon.

Example references for public clients

WTE Kuwait

WTE Wassertechnik is the general contractor for the Umm Al Hayman wastewater treatment plant in Kuwait, one of the world's largest projects for treating wastewater and supplying agriculture and industry with process water (Treated Sewage Effluent - TSE). SCHAUB has supplied, installed and commissioned two lime slaking plants.

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Landeshauptstadt Stuttgart, Hauptklärwerk Mühlhausen, DE

Stadtentwässerung Stuttgart (SES) decided to extend the main sewage treatment plant in Stuttgart-Mühlhausen by a 4th treatment stage for the elimination of trace substances. SCHAUB has successfully commissioned the first two of a total of four powdered activated carbon dosing systems.

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As experts in plant engineering, we realise efficient and modern hydrated lime plants, lime slaking plants and powdered activated carbon plants for wastewater treatment.

Contact us now and let us advise you!