Water treatment

All our plants are robust industrial designs and are characterized by a simple system structure. The modularity allows a flexible application and an uncomplicated extension if required. 

Our processes and plants make it possible to implement even complex requirements economically, both stationary and mobile.

The process used depends, among other things, on the type of contamination of the water and the target quality.

Membrane plants

Typical applications (excerpt):

Seawater desalination | Desalination of boiler feed water | Industrial wastewater treatment | Drinking water filtration | Process water treatment | Water recycling | Separation of organic solutions | Active substance enrichment | Filtration of beverages | Oil-water separation of stable emulsions | Fine particle separation

In our membrane plants, the water to be treated is fed under pressure onto a membrane (selective permeable body). Depending on the degree of fineness of the membrane filters, different components of the water are retained in this way - without the need for chemical additives. Our membrane modules are extremely low-maintenance and require no regeneration chemicals. They are therefore highly efficient and environmentally friendly.


In the field of membrane processes, a distinction is made between various techniques with characteristic degrees of fineness of the filters. Starting with the coarsest degree of fineness, these are:

  • Microfiltration  
  • Ultrafiltration  
  • Nanofiltration  
  • Reverse osmosis

While ultrafiltration focuses on reducing microbial loads, nanofiltration and reverse osmosis also ensure water desalination. Nanofiltration has a lower working pressure than a reverse osmosis solution and is used when you want partial desalination or partial softening. It is a common process in drinking water treatment and process water treatment.

Reverse osmosis systems, also called UO systems or RO systems (reverse osmosis, reverse osmosis), remove salts and organic matter almost completely. The natural process of osmosis (the effort of equalizing the concentration of two liquids separated by a selective permeable membrane) is reversed with the help of pressure. Reverse osmosis systems are used, for example, in laboratories, hospitals and in medical technology or in the chemical, pharmaceutical and food processing industries.


Product information

 Removal of salts up to 98%

 Removal of organic substances up to 90%

 Energy recovery

The membrane modules used allow user-friendly and low-maintenance operation without regeneration chemicals. Depending on the application, we use different materials such as plastics or stainless steel.

Option examples: Permeate recirculation, purification system (CIP), blending system, constant control inlet, other materials, antiscalant dosing.

Ion exchangers and water softening

Typical applications (excerpt):

Water softening | Seawater desalination | Desalination of boiler feed water | Industrial wastewater treatment | Drinking water filtration | Cooling water | Process water treatment | Water recycling | Process technology, e.g. in the chemical industry | Nitrate removal | Removal and recovery of heavy metals

When we speak of "water" in general, we usually mean water that contains visible or non-visible components in addition to water molecules. Thus, dissolved ions, minerals, salts and gases are found in water, which together determine the total salt content as well as, through the various charges, the electrical conductivity of the water. An ion exchange material is able to absorb the desired ions (positively or negatively charged particles) from the surrounding medium and replace them with other ions.​​​​


Today, ion exchange resins, artificial polymers, are used which, depending on the application, can perform full desalination (also deionization, demineralization, production of deionized water) or partial desalination. Probably the best known and longest industrially applied example of targeted mass transfer is water softening, which is also used in the private sector. In order to obtain "soft" water and to reduce the formation of limestone, the hardness minerals calcium and magnesium are replaced by sodium ions from the ion exchanger. The calcium and magnesium hydrogen carbonates are finally present as sodium hydrogen carbonate. 

Other applications, for example in electroplating, include the removal and recovery of heavy metals or nitrate removal.


Product information

Our ion exchangers are used in particular in the process industry. Depending on the requirements, different processes and materials can be realized. Plants based on hygienic design principles are of interest to the food and pharmaceutical industries. Therefore we plan and build the plants according to your needs. 

We deliver the plants pre-assembled as standard. This allows fast and uncomplicated commissioning. Containers, skid plants or on-site assembled plants of different sizes are part of our scope of supply.

Fixed bed filters: activated carbon and sand filters

Typical applications (excerpt): 

Wastewater | Landfill leachate | Boiler feed water | Drinking water | Groundwater | Well water | Industrial wastewater | Gas purification | Odor removal | Landfill/biogas | Decolorization e.g. of foodstuffs | Taste improvement | Selective filtration e.g. in the chemical industry

Fixed bed filtration with sand is used for particle filtration. When filled with activated carbon, chemical contaminants such as pigments or hydrocarbons are also removed by adsorption on the highly porous material.


Possible applications of activated carbon filters (excerpt):

  • Wastewater
  • Landfill leachate
  • Boiler feed water
  • Drinking water
  • Groundwater
  • Well water
  • Industrial wastewater
  • Gas purification
  • Odor removal
  • Landfill / biogas
  • Decolorization e.g. of foodstuffs
  • Taste improvement
  • Selective filtration e.g. in the chemical industry

The material activated carbon has an enormously high porosity. The internal surface area is in the range of 600 to 1,600 m2/g and thus enables the adsorption of many substances and materials from gases and liquids.

Carbonaceous raw materials such as wood, lignite, hard coal, fruit pits such as olive pits, coconut shells, etc. are used as raw materials for the production of activated carbons. Depending on the type of activation and the form (granules, powder, etc.), the activated carbons have different properties. We take advantage of this and adapt our plants to your needs.


Product information

 Backwashable modular systems

 Pressureless or with pressure system

 Also available as mobile system

Activated carbon is available in various forms, each with different properties, e.g. as powder or granules

Splitting plants

Typical applications (excerpt):

Industrial wastewater treatment | Process water treatment | Water recycling

In this chemical-physical wastewater treatment, a chemical reaction leads to the precipitation of previously poorly soluble substances after the addition of precipitants. This results in flocculation of the substance to be removed, which can then be removed from the water by means of filtration. Even heavily polluted wastewater can be reliably cleaned using this method.


Industrial wastewater contains a wide variety of pollutants and contaminants. Our splitting plants reliably clean industrial wastewater using simple and robust technology. The areas of application are wide - almost all processing industries require water or have to treat wastewater. Wastewater recycling is also gaining in importance due to increasing cost pressure.


Product information

Due to the modular and compact design, our plants can be installed in a very space-saving way. Due to the modularity and standardization, our plants are economical and reliably master the hard industrial routine. Our processes are:

  • Precipitation
  • Flocculation
  • Sedimentation
  • Neutralization
  • Adsorption
  • Oxidation
  • Combinations of different processes
Wastewater samples after treatment

Mobile drinking water purification

Our mobile water treatment plants purify heavily polluted surface water or seawater. They are used to produce vital drinking water, for example in civil defense and disaster control or for private provision. 

In the course of environmental disasters, severe weather events or technical failures of the water network, private households regularly find themselves in the unpleasant situation of not having clean water. Mobile water treatment plants are the temporary solution and provide valuable drinking water. Private precautions and a comprehensive equipment of the disaster control with plants for drinking water treatment are essential. We can provide you with tailor-made plants for your purposes.


For us in Central Europe, clean water is a matter of course. However, we should be aware that the amount of usable fresh water is also limited in our country (sinking groundwater levels, drought monitor of the UFZ) and that our access can be abruptly denied by technical failures or environmental events. In such cases, mobile drinking water treatment plants are usually used by disaster control organizations such as the fire department, the German Federal Agency for Technical Relief, the German Federal Armed Forces or other relief organizations. We will be pleased to advise you.


Product information on our current systems is available on request!

In 2021, heavy rainfall events also caused dramatic destruction in this country. The drinking water network was disrupted locally for months

Images on this page from top left to bottom right: Arpon -; iph Hähn; Alex Stemmers -; iph Hähn; smuay -; iph Hähn; sunakri -