Prospector enables defined enriched consortium selection for PFAS degradation via defluorination and Chain-Shortening
Esaú De la Vega-Camarillo1, Jorge Arreola-Vargas1, Saurav Kumar Mathur1
1Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, USA.
Bioresource Technology
|May 22, 2026
Summary
Researchers developed bacterial consortia using nanowell arrays to degrade persistent per- and polyfluoroalkyl substances (PFAS). High-density bacterial communities effectively removed PFOS and PFOA, demonstrating a promising bioremediation strategy for these challenging contaminants.
Area of Science:
- Environmental Science
- Microbiology
- Bioremediation
Background:
- Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants due to stable carbon-fluorine bonds, making their biodegradation difficult.
- Developing effective bioremediation strategies for PFAS is crucial for environmental protection.
Purpose of the Study:
- To isolate and enrich bacterial consortia capable of degrading perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) using nanowell array technology.
- To identify optimal conditions for cultivating stable, PFAS-degrading microbial communities.
Main Methods:
- Utilized Prospector® nanowell array technology to screen 96,000 wells for PFAS-degrading bacteria.
- Employed PFOS and PFOA as selective growth substrates.
- Characterized eight enriched consortia using 16S rRNA sequencing and measured PFAS degradation and fluoride release.
- Validated Community H performance in bioreactors under aerobic and anaerobic conditions.
Main Results:
- High-density inoculum loading (20-33 genera) was essential for developing functionally stable consortia.
- Community H achieved 87.8% PFOS removal and near-stoichiometric fluoride release within 10 days.
- Community E showed the highest PFOA removal (44.9%).
- PFOS and PFOA degradation were inversely correlated, with specific genera predicting performance.
- Bioreactor validation confirmed significant PFOS removal (91.5% aerobic, 62.6% anaerobic).
- Perfluorohexane sulfonate (PFHxS) was identified as a transient intermediate, indicating chain shortening.
Conclusions:
- Nanowell array-guided community assembly is a reproducible method for developing PFAS bioremediation consortia.
- Community complexity positively correlated with degradation performance, highlighting the importance of microbial diversity.
- Evidence suggests growth-associated defluorination without co-substrate amendment, warranting further investigation into PFAS carbon utilization by biomass.
Keywords:
BioremediationC-F bond cleavageEnriched consortiaForever chemicalsNanowell arrayPFAS biodegradationPFOAPFOS
