• Phosphate removal from surface water
  • Rehabilitation of eutrophicated waters
  • Nutrient elimination in outdoor pools and garden pond

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High phosphate levels are a major problem for lakes, rivers and other natural waters.

Introduced as a constitute of the waste water, it functions as a fertiliser and results in the algae there growing quickly. The body of water becomes eutrophic and the risk of the formation of “dead zones” increases. GEH® helps to maintain the natural balance in lakes by removing phosphate as a nutrient from the water. The treatment using GEH® is a low-energy and sustainable process.



Good to know:

With GEH® and the adsorption process, phosphorus can be eliminated in a purely physical way – without a specific dosage of chemicals. Best of all: the process is scalable – so that open air pools can be treated just like large lakes with a capacity of over 600,000 m³.

GEH®: Your choice for phosphate removal and for algae-free surface waters

As a salt, phosphate is basically a nutrient. It is found in fertilizers, laundry and food. We as humans need phosphate for our body to function properly and as a basis to build DNA. An excess of phosphate would damage our bodies. The situation is similar with phosphate in nature: as a natural fertilizer, it ensures growth.

But: If there is too much of it, it suffocates life – literally. Because it accelerates the multiplication of phytoplankton, like algae in water. If the algae die and sink to the bottom, they are decomposed by microorganisms. This eutrophication gradually leads to a lack of oxygen that suffocates fish and other aquatic organisms. GEH® as a phosphate filter material counteracts this. The phosphate binding or phosphate removal is carried out by selective adsorption. This is an energy-free and sustainable process in which the nutrient phosphate is taken from the water.


GEH® phosphate water treatment – for water purification in municipal outdoor pools and garden ponds

We humans also add phosphate to the water when bathing in lakes or other open waters. Through sun and nourishing creams on our skin, by feeding the fish and leaves that fall into the water. Before eutrophication can take place, which is harmful to our health when swimming, GEH® ensures an effective phosphate removal.

GEH® for phosphate removal and more

Hydrogen Peroxide
Hydrogen Sulfide

Iron hydroxide granules for sustainable water treatment

GEH® consists of granular ferric hydroxide. It is an innovative filter material that not only convinces with the environmental balance, but also in terms of economic considerations. Whether you use our adsorbent against phosphate, to reduce the arsenic load in your water or to meet the highest legal standards – we recommend GEH® for all these fields of application. Why?
The big advantage of our product is the so-called physisorption, the basis for phosphate removal. The filter substrate binds substances such as arsenic or phosphate and takes them completely out of the water cycle. This is how surface waters can be saved. And without interfering with the ecosystem through the use of chemicals.


Phosphate removal and water protection: how to do it properly!

With GEH®, you get more than just a water treatment product from us. We advise you with our individual services for the optimal use of GEH® in your systems. We are happy to talk about possible increases in efficiency and optimizations that make a difference for you and the environment. Get in touch with GEH Wasserchemie and find out how GEH® works – for an efficient phosphate removal!


Chemical composition ß-FeOOH and Fe(OH)3
Dry solid content 58 % (± 10%)
Iron content, relative to dry solids 600 g/kg (± 10 %)
Particle size range 0.2 – 2.0 mm
Undersize fraction < 10 %
Total oversize and undersize fraction < 20 %
Bulk density, backwashed 1150 kg/m3 (± 10 %)
Specific surface area (BET-method) approx. 300 m2/g

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