Biogas upgrading - Biomethane

One of the most promising and developing biogas utilization method is biogas upgrading to biomethane. SiGa-Tech has developed and constructed MethaPUR system for biogas upgrading based on membrane separation process.

In MethaPUR method, new generation membranes with highest separation parameters are used. Thanks to multi stage process, methane separation with very high efficiency is possible (biomethane stream with CH4 > 99% by vol., methane loss can be lower than 1% by vol.).

 

SiGa-Tech produces and offers biogas upgrading stations from 50 to 2200 Nm3/h

Process

Biogas is preliminarily purified from undesirable pollution such as Hydrogen Sulfide, Siloxanes or VOC (volatile organic compounds), chilled and pressurized to approx. 15 bar overpressure.
Clean, dry and pressurized biogas flows through membrane modules. Every membrane module consists thousands of microfibers which size is near to human hair diameter. Thanks to high selectivity of basic biogas compounds for membrane material infiltration (Carbon Dioxide infiltrate through membrane material 50 times faster than Methane) two streams are separated in the outflow: Methane and Carbon Dioxide. During process other biogas compounds are partially separated, for example oxygen is separated with >50% efficiency.
As a result we receive biomethane with very high Methane concentration, often exceeding 99% by vol.
It is also possible to recover significant amounts of heat from the process.

System

Whole system is located in standard sized container, or in couple of containers for larger systems. Thanks to this solution we can offer compact and elastic system which can be located on new installations as well as on existing objects. Such solution also shortens time between delivery and start-up.

Advantages

  • full efficiency flexibility from 0% to 100% biogas flow;
  • stable work with possibility to adapt to process changes;
  • compact, modular design with possible easy expansion;
  • minimum service and maintenance requirements;
  • low energy consumption;
  • no demand for chemicals;
  • no water demands;
  • very short start-up time = minimum methane losses;
  • feeding directly to natural gas network (no need of additional pressure increase).

Options

Natural gas grid connection elements. Additional modules for CNG bottle filling.