gas usage concepts
Flexible concepts for biogas
Biogas is a versatile, renewable energy source that is continuously available and offers numerous recycling options. Depending on the location, infrastructure and target market, the raw biogas produced can be used and processed in different ways. WELTEC BIOPOWER develops tailor-made concepts with which operators maximize the energy and economic benefits of their biogas plant.

Biogas upgrading and CO₂ liquefaction
equivalent to fossil gas
One particularly efficient form of utilizing raw gas is processing it into biomethane. The biogas is refined to the quality of natural gas and can then be fed into the public gas network or marketed directly. Feeding into the grid significantly increases the degree of utilization of the generated energy and enables flexible, location-independent use. The CO₂ produced during biogas treatment can be reused, such as in the form of CO₂ fertilizer in greenhouses or liquefied for industrial applications.
Grid injection
Once processed to natural gas quality, biogas can be fed into the public gas grid. From there, it is available for a variety of applications. The quality of this processed biogas, which is now biomethane is equivalent to that of fossil natural gas, and it can serve as a substitute for it.
Fuel for the Transportation Sector
Biomethane can be used in the mobility sector as bio-CNG (compressed) or bio-LNG (liquefied). Compared to diesel engines, this results in up to 90 percent fewer particulate emissions and a noticeable reduction in noise pollution. These advantages make biomethane an attractive fuel for buses and delivery vehicles, particularly in urban traffic, while also contributing to the reduction of greenhouse gas emissions.
CO₂ liquefaction and usage
The CO₂ captured during biogas upgrading can be purified, compressed, and liquefied. Non-condensable gases are separated and returned to the process. The liquefied CO₂ meets food-grade standards and can then be used as a raw material in industry, food production, or horticulture.
Usage in a Combined Heat and Power (CHP) Plant
POWER & HEAT
Biogas can be utilized particularly efficiently in a combined heat and power plant. This process simultaneously generates electricity and heat, which can be flexibly used or sold as needed. This combined use forms the basis for economical and reliable energy production.
Use of electricity
The electricity generated from biogas in the combined heat and power plant can either be fed into the public grid or used on-site. Generating electricity on-site helps reduce operating costs, while feeding electricity into the grid provides a reliable source of revenue. At the same time, the continuous supply of biogas-generated electricity helps stabilize the energy supply.
Heat utilization
The heat generated by the combined heat and power plant can primarily be used as process heat to heat the digesters. In addition, it can be used to heat residential and commercial buildings. By integrating it into local heating systems, the heat can also be sold profitably.
Do you have any questions about biogas plants, projects or individual solutions? Write an email — our team will get back to you as soon as possible. We are happy to advise you on all topics relating to planning, technology and profitability.
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