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                              Biogas & Bio-NGV

                              Global solutions, immense potential

                              Biogas is a renewable energy produced during the anaerobic digestion of biomass: household waste, industrial and agricultural waste, and sewage sludge. Aware of its potential as part of the energy transition, Air?Liquide develops comprehensive solutions for biogas recovery and meets the needs of farmers, waste treatment managers, and agribusiness.

                              Biomethane production chain

                              Biogas produced from the fermentation of waste is a renewable energy source which, after purification, can be substituted for natural gas of fossil origin. Farmers, industry, and local communities thus treat their waste while enhancing their energy and economic potential.

                              The process is as follows:

                              • stored in an oxygen-free digester, waste breaks down and produces a biogas consisting primarily of methane
                              • this methane (or biomethane) is then purified and the carbon dioxyde is removed in an Air Liquide production unit
                              • lastly, the methane is directly injected into the natural gas network or liquefied

                              Once distributed, the methane can be used for the production of heat for homes and industry, but also as a vehicle fuel (bio-NGV).

                              Efficient purification and liquefaction units

                              Air Liquide’s purification units were designed to be efficient and flexible. Based on membrane gas separation technology (Medal?), they can extract up to 99.5% of the methane. The flow rate of these units generally ranges between 100 and 10,000 Nm3/h.

                              The biomethane liquefaction units provide an answer to the lack of a gas transport network. In liquid form, transportation to the point of use (bio-GNV?stations, for example) is much easier.

                              Air Liquide offers many services associated with its biogas solutions: training in operation and maintenance, control settings, ongoing technical assistance, etc.

                              In just over?10 years, the Group has delivered about thirty treatment or injection units worldwide.

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