Optimizing methanation

How it works with Bicar®Z?

The operating principle of methanation can be likened to that of a cow's rumen. The microbial flora in the digester breaks down organic matter into compounds (volatile fatty acids, acetates, H2 and CO2), which are then transformed into methane (CH4) and CO2. The methanation process is optimal within specific temperature and pH ranges (30-40°C, pH 6.4-7.2).

As in cows, introducing a very energy-rich and highly fermentable organic load into the bioreactor leads to an increase in the production of fatty acids, which the digester cannot metabolize. This results in a reduction in pH and inhibition of the complete methanation process, causing economic losses for the operator.

Used as a preventive or curative measure in the event of acidosis, the addition of Bicar®Z to the substrate stabilizes pH in the digester and thus ensures biogas production.

methane-cow

A German study highlights the benefits of using Bicar®Z in methanation

A study conducted by the University of Rostock (Germany) has demonstrated the ability of Bicar®Z to ensure and optimize the operation of digesters, both preventively and curatively:

  • when continuously added to the methanizer, Bicar®Z increased biogas production by 1.8% and limited the impact of changing substrates on the yield.
  • Bicar®Z can also be used curatively in the event of acute acidosis in order to restore normal pH conditions. Thanks to Bicar®Z, the operator may thus reduce the time needed to restore normal operation in the methanizer from 60 to 30 days.