METFILTER SOCIEDAD LIMITADA

Their core work

METFILTER is a Spanish technology SME specialising in bioelectrochemical systems (BES) — a class of technologies that use electrical current to drive or enhance microbial activity for environmental remediation and wastewater treatment. Their work spans both soil bioremediation (using 3D-printed biofilm structures and nanoparticle-enhanced microbial consortia to break down contaminants) and biological nitrogen removal from wastewater via anaerobic ammonia oxidation coupled with electrocatalysis. As a small, research-active company, they bridge laboratory science and field application, having run experiments in real-world settings including international field trials. They are also capable of hosting MSCA fellowship researchers, indicating an established scientific infrastructure despite their SME status.

What they specialise in

How they've shifted over time

METFILTER's H2020 participation is short (2019–2022) and concentrated, making a full evolution arc difficult to draw — both projects overlap in time rather than representing sequential phases. That said, the keyword shift is meaningful: the earlier project (ELECTRA) emphasises the physical and biological construction of treatment systems — 3D-printed biofilms, nanoparticles, microbial consortia — while the later project (ELECTRAMMOX, which they coordinated) focuses on the process chemistry: microbial electrocatalysis, nitrification, and nitrogen removal from wastewater streams. The direction of travel appears to be from broad bioremediation technology towards more targeted, process-oriented wastewater treatment applications where bioelectrochemical systems can replace or reduce chemical inputs.

METFILTER is moving from broad environmental bioremediation towards precision wastewater treatment — specifically nitrogen-cycle management using bioelectrochemical processes — which aligns with tightening EU nutrient discharge regulations and circular water economy priorities.

How they like to work

METFILTER has both led (ELECTRAMMOX as coordinator) and joined (ELECTRA as participant) consortia, showing flexibility in role depending on the project scope. Their 22 unique partners across 8 countries from just 2 projects indicates participation in substantive, multi-partner consortia rather than small bilateral arrangements. The combination of coordinator and participant roles in adjacent topics suggests they are comfortable driving a focused research question while also contributing specialist expertise within larger frameworks led by others.

Despite only two H2020 projects, METFILTER has built a network of 22 unique consortium partners across 8 countries, suggesting active participation in well-populated international consortia. Their field experiments in China also point to links outside the EU research space.

What sets them apart

METFILTER occupies a rare niche as a private SME — not a university or public research institute — with genuine hands-on expertise in bioelectrochemical systems, a technology class that most companies handle only at the component level (electrodes, membranes) rather than at the integrated microbial-process level. Their ability to both host MSCA fellows and coordinate RIA projects signals that they function as a research-capable industrial partner, bridging the gap between academic BES research and deployable environmental technology. For consortium builders, this means access to applied BES know-how and industrial credibility without the overhead of a large research organisation.

Highlights from their portfolio

• ELECTRAMMOX
  METFILTER served as coordinator of this MSCA Individual Fellowship project on bioelectrochemical anammox — a rare coordinator role for a small SME and evidence of recognised scientific leadership in microbial nitrogen removal.
• ELECTRA
  The largest-funded project (EUR 364,875) placed METFILTER inside a multi-country RIA consortium tackling low-energy bioremediation using 3D-printed biofilms and nanoparticles, including international field trials in China.