1
|
Bhatt P, Bhatt K, Huang Y, Li J, Wu S, Chen S. Biofilm formation in xenobiotic-degrading microorganisms. Crit Rev Biotechnol 2023; 43:1129-1149. [PMID: 36170978 DOI: 10.1080/07388551.2022.2106417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 06/26/2022] [Indexed: 11/03/2022]
Abstract
The increased presence of xenobiotics affects living organisms and the environment at large on a global scale. Microbial degradation is effective for the removal of xenobiotics from the ecosystem. In natural habitats, biofilms are formed by single or multiple populations attached to biotic/abiotic surfaces and interfaces. The attachment of microbial cells to these surfaces is possible via the matrix of extracellular polymeric substances (EPSs). However, the molecular machinery underlying the development of biofilms differs depending on the microbial species. Biofilms act as biocatalysts and degrade xenobiotic compounds, thereby removing them from the environment. Quorum sensing (QS) helps with biofilm formation and is linked to the development of biofilms in natural contaminated sites. To date, scant information is available about the biofilm-mediated degradation of toxic chemicals from the environment. Therefore, we review novel insights into the impact of microbial biofilms in xenobiotic contamination remediation, the regulation of biofilms in contaminated sites, and the implications for large-scale xenobiotic compound treatment.
Collapse
Affiliation(s)
- Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
- Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, IN, USA
| | - Kalpana Bhatt
- Department of Food Science, Purdue University, West Lafayette, IN, USA
| | - Yaohua Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| | - Jiayi Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| | - Siyi Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, PR China
| |
Collapse
|
2
|
Nicholls HCG, Rolfe SA, Mallinson HEH, Hjort M, Spence MJ, Bonte M, Thornton SF. Distribution of ETBE-degrading microorganisms and functional capability in groundwater, and implications for characterising aquifer ETBE biodegradation potential. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1223-1238. [PMID: 34350568 PMCID: PMC8724112 DOI: 10.1007/s11356-021-15606-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
Microbes in aquifers are present suspended in groundwater or attached to the aquifer sediment. Groundwater is often sampled at gasoline ether oxygenate (GEO)-impacted sites to assess the potential biodegradation of organic constituents. However, the distribution of GEO-degrading microorganisms between the groundwater and aquifer sediment must be understood to interpret this potential. In this study, the distribution of ethyl tert-butyl ether (ETBE)-degrading organisms and ETBE biodegradation potential was investigated in laboratory microcosm studies and mixed groundwater-aquifer sediment samples obtained from pumped monitoring wells at ETBE-impacted sites. ETBE biodegradation potential (as determined by quantification of the ethB gene) was detected predominantly in the attached microbial communities and was below detection limit in the groundwater communities. The copy number of ethB genes varied with borehole purge volume at the field sites. Members of the Comamonadaceae and Gammaproteobacteria families were identified as responders for ETBE biodegradation. However, the detection of the ethB gene is a more appropriate function-based indicator of ETBE biodegradation potential than taxonomic analysis of the microbial community. The study shows that a mixed groundwater-aquifer sediment (slurry) sample collected from monitoring wells after minimal purging can be used to assess the aquifer ETBE biodegradation potential at ETBE-release sites using this function-based concept.
Collapse
Affiliation(s)
- Henry C G Nicholls
- Groundwater Protection and Restoration Group, Department of Civil and Structural Engineering, University of Sheffield, S1 3JD, Sheffield, UK
| | - Stephen A Rolfe
- Department of Animal and Plant Sciences, Alfred Denny Building, University of Sheffield, S10 2TN, Sheffield, UK
| | - Helen E H Mallinson
- Groundwater Protection and Restoration Group, Department of Civil and Structural Engineering, University of Sheffield, S1 3JD, Sheffield, UK
| | - Markus Hjort
- Concawe, Boulevard du Souverain 165, 1160, Brussels, Belgium
| | - Michael J Spence
- Concawe, Boulevard du Souverain 165, 1160, Brussels, Belgium
- British Geological Survey, Environmental Science Centre, Keyworth, Nottingham, NG12 5GG, UK
| | - Matthijs Bonte
- Concawe, Boulevard du Souverain 165, 1160, Brussels, Belgium
- Shell Global Solutions International B.V., Rijswijk, 2288GK, The Netherlands
- Ministry of Infrastructure and Water Management, The Hague, The Netherlands
| | - Steven F Thornton
- Groundwater Protection and Restoration Group, Department of Civil and Structural Engineering, University of Sheffield, S1 3JD, Sheffield, UK.
| |
Collapse
|
3
|
Purswani J, Guisado IM, Coello-Cabezas J, González-López J, Pozo C. Social microbial inocula confer functional stability in a methyl tert-butyl ether extractive membrane biofilm bioreactor. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:855-860. [PMID: 30390459 DOI: 10.1016/j.envpol.2018.10.100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/19/2018] [Accepted: 10/24/2018] [Indexed: 06/08/2023]
Abstract
Methyl tert-butyl ether (MTBE) degradation technologies based on two-phase partitioning systems such as extractive membrane biofilm reactors (EMBFR) permit separation of biological and contaminant compartments, thus allowing optimization of the biological section. In this study, we set-up an EMBFR with three MTBE-degrading and cooperating strains (termed social biofilm: Agrobacterium sp. MS2, Paenibacillus etheri SH7T and Rhodococcus ruber EE6). The removal efficiency of the social-biofilm EMBFR was 80%, and functional stability was observed in the reactor, i.e. more efficient than previous studies (single-strain inoculated EMBFR, <50% removal efficiency and unstable function). Metabolite tert-butyl alcohol was not observed, and the EC50 values were higher than those observed in single-strain EMBFRs. Comparative analysis of the MTBE enzymatic pathway and the social-biofilm was performed, where the mechanism of cooperation observed within the social-biofilm is likely due to enzymatic redundancy. Functional outcomes were equal to previous batch tests, hence 100% scalability was obtained. Overall, higher functional and stability outcomes are obtained with the use of the social-biofilm in an MTBE-EMBFR.
Collapse
Affiliation(s)
- Jessica Purswani
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain; Department of Microbiology, University of Granada, Granada, Spain.
| | - Isabel M Guisado
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain; Department of Microbiology, University of Granada, Granada, Spain
| | - Julio Coello-Cabezas
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain
| | - Jesús González-López
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain; Department of Microbiology, University of Granada, Granada, Spain
| | - Clementina Pozo
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain; Department of Microbiology, University of Granada, Granada, Spain
| |
Collapse
|