Biogas production

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Metener’s dry batch reactor

– a sustainable method for producing biogas energy

Image: Pyhäjärvi biogas dry batch production facility

WET vs DRY Production

What is the difference between wet and dry anaerobic digestion?

Wet biomass typically includes organic waste from the farming and food industries. It can include also municipal waste, microalgae, and other content material with higher moisture value that is not frequently recycled. The feedstock is usually pumped, heated, and stirred. Dry Biomass, on the other hand, contains the dry matter typically from fields and dried animal manure (lacks or excluding water) which can be stacked in the dry anaerobic digester and have process liquid percolating through the biomass.

Metener & wet fermentation

Metener has designed and constructed several full scale biogas plants across four continents, based on the traditional wet fermentation process. This process is suitable for high water content biomasses like sludge, biowaste, food industry and municipal waste.

Metener & dry fermentation

Metener has developed and patented batch digestion process for dry, slowly degradable biomasses like straw, grass and wood. Research and development has been done since 2005 in pilot scale and since 2015 in full scale digesters.

Energy production

1.

Heat

Biogas is easy to use in boilers. A gas burner is possible to be installed to an oil boiler.

2.

Combined heat and power (CHP)

When electricity is needed, biogas is used in a CHP unit, which produces 35-42% electricity and 43-50% heat.

3.

Traffic fuel

Biogas is upgraded and pressurized before filling to vehicles. Upgraded biogas is called biomethane and it is like natural gas, although biogas is renewable energy! A biogas/natural gas vehicle is called CNG vehicle.

4.

Biogas is possible to transfer by pipeline or by bottles

If biogas utilization (like CHP) is not next to the biogas plant, biogas can be transferred to the utilization place by pipeline with no energy losses. Biogas can be also stored in cylinders but first it needs to be upgraded and pressurized.

What is your biogas potential?

Try out our biogas potential calculator for more details.

Disclaimer: The follow figures and calculations are intended to provide an approximate output