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Genetically engineered microorganisms: A promising frontier for PFAS bioremediation
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This review examines the potential of genetically engineered microorganisms (GEMs) for breaking down persistent PFAS contaminants, highlighting how CRISPR-enhanced dehalogenases and metabolic pathway engineering offer a safer alternative to high-temperature incineration while presenting scalability and ecological containment challenges that require further research.
Per- and polyfluoroalkyl substances (PFAS) are persistent environmental pollutants widely used in industrial applications due to their exceptional chemical stability. However, their presence in wastewater poses significant environmental and health risks, necessitating innovative remediation strategies. Traditional treatment methods are inadequate for breaking strong carbon-fluorine bonds and present substantial process safety risks including high-temperature operations (800–1200°C), explosive potential, and toxic gas emissions. This has led to increased interest in genetically engineered microorganisms (GEMs), which offer inherently safer operating conditions with ambient temperatures , atmospheric pressure, and reduced explosion risks. This review explores GEMs' potential for PFAS degradation, focusing on genetic engineering technologies such as CRISPR, synthetic biology, and metabolic pathway engineering. The review highlights target enzyme optimization, including dehalogenases and oxygenases, showing promise for cleaving PFAS bonds. Process safety advantages include elimination of high-pressure vessels, reduced fire hazards, and containment of byproducts within controlled biological systems. Strategies for enhancing microbial efficiency, including metabolic flux analysis and co-metabolism, are discussed alongside scaling challenges from laboratory to pilot applications. Key considerations include environmental concerns, microbial containment, reactor safety design, and accident prevention protocols to balance technological benefits with ecological safety. Comparative analysis demonstrates GEMs' superior safety profile versus conventional treatments. Future directions emphasize integrating GEMs into existing wastewater treatment systems and advancing bioreactor designs. Research gaps, including long-term ecological impacts and economic scalability, are critical areas requiring study. With responsible deployment, GEMs provide sustainable solution for mitigating PFAS environmental impact.
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Probiotic and Microbial Enzymatic Mechanisms for PFAS Detoxification
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This review examines microbial and enzymatic mechanisms — including oxygenases, reductive dehalogenases, and gut microbiota sequestration — capable of transforming or partially degrading PFAS 'forever chemicals,' while noting that complete mineralization remains elusive. PFAS are co-contaminants frequently found sorbed to microplastics in environmental samples, making probiotic and microbial degradation strategies highly relevant for combined exposure remediation.
Meeting the Moment: Opportunities and Limitations for for Genetically Engineered Microbes for Bioremediation
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This review evaluated the potential and limitations of genetically engineered microbes for bioremediation of emerging contaminants including microplastics, PFAS, pharmaceuticals, and pesticides. The authors highlighted engineered Pseudomonas-Aspergillus combinations for PET/PE degradation and integrated membrane filtration as promising advances, while emphasizing need for regulatory frameworks for open-system GMO use.
Recent advances in microbial biotechnology for wastewater treatment
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This review surveys advances in microbial biotechnology for wastewater treatment, including engineered consortia, synthetic biology, CRISPR tools, and hybrid bioreactor systems, with specific attention to emerging contaminants such as microplastics, pharmaceuticals, and PFAS that conventional treatment systems inadequately address. These biotechnological innovations represent a promising frontier for removing microplastics at the treatment plant before they enter aquatic environments.
From candidate genes to field deployment: Engineering microbial consortia for degradation of persistent industrial chemicals
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Researchers review how engineered microbial consortia can be designed to biodegrade persistent industrial chemicals — including PFAS, chlorinated solvents, PAHs, and plasticizers — tracing progress from gene and pathway discovery to field deployment, while identifying key gaps in predictability, ecological robustness, and regulatory approval.
Integrating Computational Tools and Machine Learning for Microbial Enzyme Engineering in Persistent Pollutant Management: A Systematic Review from Detection to Recycling
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Scientists are using AI tools (like AlphaFold, the program that predicts protein shapes) to design custom microbial enzymes that can break down stubborn pollutants like PFAS ("forever chemicals"), microplastics, and other toxic industrial chemicals that build up in our environment and bodies. This paper reviews existing research on these computational methods rather than presenting new lab results, but it matters because faster, smarter enzyme design could eventually lead to real-world tools for cleaning up the pollutants linked to health problems like hormone disruption and cancer risk.
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