A biogas upgrader is a facility that is used to concentrate the methane in biogas to natural gas standards. The system removes carbon dioxide, hydrogen sulfide, water and contaminants from the biogas. The solution is the use of biogas upgrading or purification processes whereby contaminants in the raw biogas stream are absorbed or scrubbed, leaving more methane per unit volume of gas.

There are four main methods of upgrading: water washing, pressure swing adsorption, selexol adsorption, and amine gas treating. This purified biogas is also called biomethane.

Why monitor and analyze the gas I produce?

Biomethane, is a biogas which has been upgraded to a quality similar to fossil natural gas and having a methane concentration of 90% or greater. Biomethane is used for vehicle fuel or for injection into the natural gas grid network. In a natural gas network, the grid entry unit governs the flow of gas into the network and will require the gas quality to be of sufficient level for entry, typically over 95% methane. The verification of the scrubbing process for the removal of H2S and the overall purification process all need to be monitored through the analysis of the composition of the gas.

What benefits will I get?

Return on investment through maximizing energy injection to the grid Validation of the overall purification process Grid entry unit does not shut off and force the gas back through the entire process again Reduction in flaring Reduction in Greenhouse Gas emissions

How do I do it?

Fixed in line systems offering continuous monitoring with auto-calibration once the gas has been purified. These systems connect via industry standard protocols to the operators control systems housed on site.