eco charThe residue EcoChar is a carbon-rich product obtained when biomass is heated in a closed container, in either an oxygen-starved or oxygen free environment. EcoChar consist of high P and K (Mg or Ca) values, can hold 2.5 times its volume in moisture and therefore attracts and has a carbon-negative process Co2:C ratio = 3:1. Because of these characteristics EcoChar will greatly improve soil fertility, lowers the amount of nutrients or fertilizer needed and reduce your carbon footprint!

What is EcoChar?

To better understand what EcoChar is, therra pretayou can compare it with Biochar. Biochar is retained in the soil over thousands of years and it enriches the soil. The “black earth”, or Terra Preta, of the Amazon Rain Forest is noted worldwide as being one of the most fertile soils, because of the biochar material in it!

This Biochar is generated out of wood and consist of only a few nutrients compared to EcoChar.

If a biomass material such as manure, litter or biosolids is used in our gasifier, the EcoChar output has superior nutrient-retention properties and is even more valuable for improving stability in soil then Biochar. EcoChar is in fact the premium version of biochar. It can increase the crop yields, boost the agriculture and even optimize the fertility of your own backyard. In addition it also has a variety of other uses, including animal feed supplements, beddings, and use as a water filtration medium.

Main advantages of EcoChar

  • EcoChar consist of high P and K (Mg or Ca) values
  • It is capable of holding 2.5 to 3 times its own volume in water
  • Reduces the amount of water needed because of increased water retention in the soil
  • Releases the amount of nutrients gradually and hereby lowers the amount of fertilizer or nutrients needed
  • Improves performance over time – the 2nd and 3rd year is better than the first
  • Free from pathogens, E-coli, growth hormones and residues from medication, because they are burned in the gasifier
  • Still contains the mineral ash and fixed carbon
  • Valuable and carbon-rich
  • Reduces harmful runoff
  • Increases plant growth
  • Commercial value varies between €100-800,-/ton
    (depends of composition and end-use purpose)


EcoChar Closeup Micro


Composition of EcoChar

Biomass materials contain carbon in two forms – fixed carbon and volatile matter. The carbon in the volatile matter is reacted in the gasification process, while the fixed carbon is left behind in the output of the system.

Manure will contain anywhere from 15 to 30% mineral ash, and 6 to 18% fixed carbon. This produces an EcoChar with a carbon content around 20 to 25%, but containing an array of beneficial nutrients – P(Phosphorus), K(Potassium), Ca(Calcium), and Mg(Magnesium).

Due to the high temperatures and retention time, EcoChar from manure or chicken litter is guaranteed free from pathogens, E-coli, growth hormones and residues from medications.

EcoChar can be vastly different depending on the way that it is produced and the materials from which it was created. In the following table the typical composition EcoChar products are shown:

tabel EcoChar
Mavitec Green Energy & Coaltec have extensive knowledge of a variety of biochars being produced at a commercial scale. This allows for the formulation of a range of qualities of biochar to address the needs of different crops and soil types. As a pioneer in the formulation of EcoChar, we are working towards providing products, markets and distribution systems to fill the need for this valuable commodity.