The Effect of Organic Carbon Addition on the Community Structure and Kinetics of Microcystin-Degrading Bacterial Consortia

Microcystin (MC), a hepatotoxin that is associated with cyanobacterial blooms in freshwater lakes, threatens the quality of drinking water resources. Biodegradation of MC using biofiltration is emerging as a cost-effective solution for drinking water treatment. This study reports isolation of five M...

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Bibliographic Details
Published in:Water (Basel) 2018-10, Vol.10 (11), p.1523
Main Authors: Manheim, Derek, Cheung, Yuen-Ming, Jiang, Sunny
Format: Article
Language:English
Subjects:
Algae
Amino acids
Aquatic ecosystems
Bacteria
Bioavailability
Biodegradation
Biofiltration
Carbon
Carbon sources
Climate change
Community structure
Consortia
Cyanobacteria
Drinking behavior
Drinking water
Environmental conditions
Ethanol
Freshwater lakes
Kinetics
Laboratories
Lakes
Metabolism
Microorganisms
Organic carbon
Sediments
Surface water
Water quality
Water resources
Water treatment
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Summary:Microcystin (MC), a hepatotoxin that is associated with cyanobacterial blooms in freshwater lakes, threatens the quality of drinking water resources. Biodegradation of MC using biofiltration is emerging as a cost-effective solution for drinking water treatment. This study reports isolation of five MC-degrading microbial consortia and investigation of their community structure and kinetics in the presence or absence of a readily-bioavailable organic carbon source. The results indicated that the presence of a bioavailable organic carbon source caused: (1) the proliferation of community members previously unobserved in each consortium cultured without ethanol; (2) a shift in abundance of representative taxa; (3) a fluctuation in genera affiliated with MC-biodegradation; and, (4) a unique response in simulated diversity among consortia. These changes to each microbial consortium were paralleled by a significant decline in MC degradation kinetics. Overall, this study highlights the importance of integrating environmental conditions into the design and operation of biofiltration systems for MC biodegradation.
ISSN:2073-4441
2073-4441
DOI:10.3390/w10111523