Lithuanian Sapropel Association


Sapropels can be used in various sectors and can have multiple applications.

Sapropels as fertilizers

In modern days, all types of sapropels are used in fertilization, which relatively may be divided in three groups:

Group 1 – sapropels with organic matter content over 50% are used in organic-mineral fertilizers. When composting such sapropels, addition of other organic materials is not necessary (peat, etc.);

Group 2 – sapropelites with organic matter content from 10 to 50%. Those are complex mineral fertilizers, which are rich in lime, phosphorous acid, total nitrogen, and organic matter;

Group 3 – mineralized sediments with organic matter content up to 10%, mostly used for improvement of mechanical composition of soil. It these sediments contain high CaO concentration, it reduces the acidity of the soil.

In addition, fertilizing products made out of sapropels are capable of:

  • creating soil humus;
  • restoring soil fertility;
  • improving soil structure;
  • increasing cropping capacity by 40-60%;
  • eliminating the growth of pathogenic nematodes;
  • increasing soil moisture content by 4-5 times;
  • reducing yield ripening time;
  • neutralizing possible excessive concentrations of radionuclides, heavy metals, pesticides and chemical fertilizer salts in the soil;
  • increasing vitamin content in vegetables and fructose content in fruits;
  • preventing of soil humus erosion.


Sapropels as feed additives

Sapropel feed additive improves the functioning of liver and stomach as well as formation and circulation of blood, protects animals from getting sick, and improves resistance to unfavorable environmental conditions

Sapropel improve the oxidation processes in the body – help increasing and accumulating protein in the blood, increase formation of erythrocytes in the red bone marrow, improve synthesis of A- and other vitamins, normalize metabolism, and are effective in treatment of poisoning.

Sapropels in balneology, medicine and veterinary

The high thermal capacity of sapropels ensures long and deep heating of tissue and normalizes blood pressure, which facilitates treatment of inflammation of joints, peripheral nervous system, skin, and female genitals. High adsorption ability of sapropels stimulates healing of moist wounds. Antibiotics and antioxidants in sapropels facilitate fast conclusion of inflammation processes as well as cure eczema, dermatitis, and skin burns.   Application of heated sapropels successfully cures phlegmons (diffuse inflammation of adipose tissue with formation of pus), mastitis, furuncles, chronic gastritis, stomach and duodenal diseases caused by ulcer.

Sapropels as ecological drilling fluids

The alkali extracts of sapropels, just like the extracts of the brown coal, are used in the geological exploration as ecological drilling fluids. They contain water-soluble salts and polyvalent metals and are used in humate reagents. These reagents are partially synthetic materials, which contain > 40% humic substances.

Sapropels as burning fuel

In 1991, a study was carried out in Russia on the application potential of sapropels in intensification of the heat treatment of combustible shale with high ash content, which would increase the amount of the obtained resin and gas as well as improve their composition.  From such modified combustible shale, it is possible to obtain 54% more resins and 4 times more phenols with increased content of resinous and water-soluble phenols

Sapropels in construction industry

Researches showed that a fraction of organic sapropel with high dispersity (< 50 nm) and high content of hydrolyzed substances, if treated by alkali, has a good adhesive and hydrofobization ability, which may be used as an additive to the binding agent for production of wood fiber and agricultural waste sheets.

Sapropels in concrete production

Mixture of raw sapropels and NaOH fits well as the binding agent in the production of building blocks and heat insulation materials from woodchip, little decomposed peat, and similar raw materials. The mixture of woodchips, peat, and sapropels is called sapropelconcrete. As one of the most important properties of sapropels is their colloid structure.  By applying light fillers, it is possible to get sapropelconcrete with low volumetric weight – 1m3 weighs 313 kg.

Sapropelconcrete has good fire resistance; it dies out by itself and does not continue the burning process if the temperature is lower than 380 °C. Therefore, Sapropelconcrete may be used for heat insulation of residential and industrial buildings, walls and ceiling of refrigerators, as well as devices and pipelines (given that the temperature does not exceed 100 °C).

Sapropels in chemical industry

Sapropels with ash content of 20-35% are valuable and versatile raw materials for chemical processing.  It may be as a source for bitumen, high-molecular-weight carbonic acids, liquid fuels and oils, paraffin, phenol, pyridine acids, electric insulation materials, rubber softener agents, ammonium compounds and other products.


  • Scientific discussion

    During the last 2017 summer days Association members initiated scientific discussion, which was related to sapropel benefits and application. The meeting took place in the Aleksandras Stulginskis University (ASU)

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  • Our members visiting Wageningen Soil Conference 2015

    Our members are attending Wageningen Soil Conference on the 23-27th August

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  • New generation soil probiotics – coming soon!

    We would like to inform you that our association members are developing new products – soil probiotics.

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