Digestate Treatment and Nutrient Recovery

Want to increase your digesters profitability? Turn your waste into liquid fertilizer!

A 6 megawatt anaerobic digester in the Netherlands installed 3 FMX units for the treatment of digestate. Prior to FMX, the facility had a tubular membrane system installed, but due to the difficult characteristics of the digestate, the tubular system was fouled beyond recovery within 3 months.

The first full scale industrial installation of its kind, the FMX has been proven to effectively and reliably treat digestate. At this installation the FMX is used as a pretreatment to remove suspended solids prior to a spiral RO system. The RO can then be used to provide clean water for reuse onsite, while concentrating the nutrients for sale as a fertilizer.

Not only does the FMX provide a reliable and consistent RO pretreatment, but the concentrated biomass from the FMX can be returned to the digester. By returning the FMX concentrate, the biogas facility has reported up to a 20% increase in biogas production. In addition, the returned biomass helps maintain a more stable digester, decreasing operational downtime of the whole operation.

Full Scale Digestate Treatment with Nutrient Recovery


Digestate Treatment Pilot Test Video

Interested in learning more about other suspended solids removal applications? Try High Strength Brewery Wastewater

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