Molecularly porous, natural product with a large bioavailable surface for absorption and storage of ammonium ions


Crystalline aluminosilicates, which are also referred to as molecular sieves, are found in nature, and consist of cations (+) and anions (-). While anions occupy a lattice-like structure, cations (especially Ca2+, K+ and Mg2+; shown in the formula as “M”) are present in a dissolved form in the duct system of the lattice structure.

Klinopmin®  comes from a group of minerals with the general structural formula:

Mx/n[(AlO2)x(SiO2)y]·z H2(with n = charges of M, mostly 1 or 2)


Ion exchange capacity

  • The ion exchange capacity is characterized by the large internal surface area of more than 500 m2/cm3. The free cations, embedded in the lattice structure such as Ca2+, K+ and Mg2+ are replaced with those from the surrounding medium. The incorporation of cations takes place selectively in this order: NH4+ >> K>> Mg2+ >> Ca2+.

Van der Waals force or adhesion on surfaces

  • This chemical structure results in a large exterior surface area of more than 40 m2/cm3. The large surface area is readily available due to its properties and thus represents an ideal colonization surface for bacteria and other microorganisms. In addition, certain biological process-inhibiting substances are absorbed by Klinopmin®  and thus relieving the microorganisms.


Especially in biological Fermentation plants, large amounts of protein-rich substrates are used. The problem arises that the concentration of ammonium (NH4+) increases considerably. As the ammonium increases in acidity, it is converted into the gas form and creates highly toxic ammonia (NH3) which is harmful for the bacteria population. In addition to those hazardous emissions, the important fertilizing effect of ammonium nitrogen is lost for any subsequent application to agricultural land.


Due to its favorable lattice structure, Klinopmin®  is capable of reversibly binding the ammonium by means of ion exchange, so that the nitrogen can be made available to plants on arable land during a subsequent application of the fermentation residue. Micronutrients are unaffected by the ion exchange effect because the selectivity of Klinopmin®  for NH4+ is much greater. Klinopmin® additionally improves the structure of the fermenter chamber and, thanks to its exceptionally large surface area, offers solid settlements and ideal living conditions for microorganisms. Due to the choice of the suitable particle size, no sediment formation occurs in a completely mixed Container.


The addition of Klinopmin® in biological fermentation plants can be carried out together with the fermentation substrate in the receiving station. Klinopmin®  is non-hazardous to water. There are no specific regulations regarding the handling and storage of Klinopmin®  (see MSDS). The product is water insoluble and thermally stable as well as acid and alkali resistant.


Klinopmin®  corresponds to the EU animal feed law and is in accordance with the EC regulation (Nr.1810 / 2005, animal feed additive) classified as anticaking agent, binder and coagulant, and, therefore, can be mixed into the animal feed and enter the biogas plant via this route.

Products available

< 50 µm < 200 µm
Bags at 25 kg palletised to 1,000 kg Bags at 25 kg palletised to 1,000 kg
Bigbag 1,000 kg  Bigbag 1,000 kg

Advantages at a glance

  • Highly effective ion exchanger for binding ammonium (NH4+) surplus in biological fermentation plants → saves fertilizer due to lower ammonia losses
  • Reduction / elimination of ammonia gas harmful to microorganisms in the digester
  • Large surface area provides an ideal growth surface for microorganisms
  • Improvement of fertilizer quality of the digestate by having high nitrogen availability
  • Reduction of ammonia odors
  • Structural improvement of the fermentation substrate in the fermenter (improved viscosity)
  • Stabilization of the fermentation process
  • No sedimentation effects
  • Easy dosage