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Microbial bioconversion of pollutants
L A Golovleva1, R M Aliyeva, R P Naumova
1Institute of Biochemistry and Physiology of Microorganisms, USSR Academy of Sciences, Moscow.
Reviews of Environmental Contamination and Toxicology
|January 1, 1992
Summary
Microorganisms, particularly Pseudomonas and Rhodococcus strains, effectively degrade hazardous xenobiotics. Immobilization techniques enhance microbial cleanup of industrial wastes and polluted environments.
Area of Science:
- Environmental Microbiology
- Bioremediation
- Industrial Biotechnology
Background:
- Xenobiotics, including volatile organic compounds and aromatic nitrocompounds, pose significant environmental hazards.
- Microbial degradation offers a sustainable solution for detoxifying various chemical pollutants.
- Pseudomonas and Rhodococcus genera are key players in breaking down diverse xenobiotics.
Purpose of the Study:
- To establish a collection of microorganisms capable of degrading a wide range of hazardous xenobiotics.
- To investigate the physiological, enzymatic, and genetic mechanisms of xenobiotic degradation.
- To develop theoretical principles for applying microbial cultures in industrial waste cleanup and environmental remediation.
Main Methods:
- Isolation and characterization of active microbial strains (Pseudomonas, Rhodococcus).
- Study of xenobiotic degradation pathways, key enzymes, and genetic mechanisms.
- Development and improvement of immobilization techniques for microbial strains on carriers.
- Application of microbial consortia and genetically engineered strains for in-situ remediation.
Main Results:
- A diverse collection of microbial strains capable of degrading toluene, xylenes, styrene, chlorobenzoic acids, and nitrocompounds was established.
- Understanding of microbial physiology and degradation pathways facilitated the development of bioremediation strategies.
- Immobilization significantly intensified industrial waste cleanup processes.
- Successful industrial applications include purification of wastewater from terephthalate, nylon-66, coke, polyisocyanate, and synthetic rubber production.
Conclusions:
- Microbial degradation is a highly effective method for detoxifying hazardous xenobiotics in industrial waste and polluted environments.
- Immobilization and genetic engineering enhance the efficiency and applicability of bioremediation technologies.
- Biotechnologies utilizing specialized microbial strains offer sustainable solutions for environmental protection and waste management.