Biomethane

Biomethane is obtained by starting from biogas produced by anaerobic digestion of organic matrices, purifying it of pollutants and carbon dioxide that are normally present in biogas in a percentage of about 50 percent. Biogas can be obtained from the digestion of agro-livestock by-products, from FORSU, from landfills, or from wastewater treatment.

CPL CONCORDIA can handle all technical and administrative aspects for the construction and operation of biomethane production facilities. With well-established know-how in plant management, CPL can take care of both the collection of biomethane produced and the CO2 leaving the upgrading system.

The process

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.

Biomethane Injection Booth

Before its use, biomethane must be analyzed, filtered, measured, adjusted or compressed, and finally odorized. The processes just described are aimed at ensuring the quality parameters imposed by current regulations. CPL CONCORDIA, given its many years of experience in the field of natural gas from fossil sources, has selected the best technologies on the market and implemented its product range in order to develop the injection cabin, aimed at ensuring the required quality and continuity of operation. In addition, through our Control Room, the plant is managed remotely by monitoring all characteristic parameters, checking their progress and reporting any anomalies to technicians on the ground for prompt field verification.