Biogas production

Costacurta manufactures wedge wire screens for screw separators used in the processing of digestate downstream of the biogas production cycle.

In biogas production, biogas is obtained from the natural fermentation of slurries and other organic substances originating, for example, from agricultural activities.

Fermentation takes place inside reinforced concrete vessels by adding bacteria and when a pre-set temperature is reached. Fermentation produces a methane-rich gas that is then burned to generate electrical and thermal energy.

Wedge wire screens for screw separators

The substances remaining at the end of the biogas production process are sent to a screw separator. Inside this separator, they are compressed by a screw as they pass through a filtering sieve with longitudinal slots. The screw transports the solid material to the machine outlet while the liquid material flows into the body of the separator through the longitudinal slots. The solid material is usually used for fertiliser or pet litter. The liquids are used for fertigation.

Distinctive characteristics of the Costacurta VICO-Screen for screw separators:

  • High precision and continuous openings
  • Cylindricity and roundness, respecting tight tolerances
  • Long-life, thanks to the material used, generally stainless steel, and high mechanical strength of VICO-Screen.
  • Minimum clogging risk compared to other filtering solutions

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