Pre-Treatment:
Pre-treatment is the stage of purifying the biogas of pollutants, mainly sulfuric acid and ammonia. Biogas is dehydrated through a process of cooling it.
Upgrading:
There are various technologies on the market inherent in CO2 capture, each of which has dedicated technological specificities and applications based on the type of biogas to be processed, as well as the use of biomethane and carbon dioxide to be pursued. Available technologies include water absorption, Pressure Swing Absorption (PSA), membranes and chemical-physical reagents; CPL CONCORDIA, following a detailed analysis is able to propose the best technological solution.
Post-Treatment:
At the end of the process, post-treatment is then required, which consists of the complete dehydration of the biomethane produced using molecular sieve technology and, in the final step, by activated charcoal that retains pollutant residues that may have passed the previous purification. The biomethane produced at this point is examined in an analysis bench and, if in accordance with UNI 11537, can be odorized in accordance with UNI 7133, fed into the grid, accumulated in a CNG distribution tank wagon, or liquefied into Bio-GNL, depending on the intended use with the corresponding incentive provided by the regulations.