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3D Bioprinted Engineered Living Microreactors for Continuous Organophosphorus Compound Degradation.
Mark R Shannon1,2, Graham J Day1, Hermes Bloomfield-Gadêlha3,4
1School of Cellular and Molecular Medicine University of Bristol University Walk Bristol BS8 1TD UK.
Small Science
|November 19, 2025
Summary
Engineered living materials (ELMs) offer sustainable solutions for environmental issues. This study details a 3D bioprinted ELM bioreactor using engineered bacteria for efficient detoxification of harmful compounds.
Area of Science:
- Biotechnology and Bioengineering
- Environmental Science
- Materials Science
Background:
- Engineered living materials (ELMs) leverage biological components for advanced functionalities.
- 3D bioprinting enables the creation of complex structures for hosting microbial communities.
- ELMs hold potential for environmental remediation and green energy applications.
Purpose of the Study:
- To design and fabricate a 3D bioprinted microbial ELM flow-bioreactor.
- To demonstrate the bioreactor's capability for cyclic detoxification of organophosphorus compounds.
- To analyze mass transfer kinetics for optimizing bioreactor design.
Main Methods:
- Genetic engineering of *Escherichia coli* for phosphotriesterase expression.
- 3D bioprinting to create a self-supporting ELM structure.
- Inducible enzyme expression for targeted detoxification.
- Principal Component Analysis (PCA) for kinetic data analysis.
Main Results:
- Successful fabrication of a metabolically active ELM bioreactor.
- Demonstrated cyclic detoxification of organophosphorus compounds.
- Identification of spatiotemporal features in mass transfer kinetics via PCA.
- Insights into design parameters for efficient catalytic microbial ELM bioreactors.
Conclusions:
- 3D bioprinted ELM bioreactors are effective for microbial detoxification.
- Advanced manufacturing combined with synthetic biology offers novel environmental solutions.
- Kinetic analysis provides crucial data for optimizing ELM bioreactor performance.

