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Open AccessArticle

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

Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697, USA
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Water 2018, 10(11), 1523; https://doi.org/10.3390/w10111523
Received: 6 July 2018 / Revised: 18 October 2018 / Accepted: 24 October 2018 / Published: 26 October 2018
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. View Full-Text
Keywords: microcystin; biodegradation; microbial interactions; community structure; biodegradation kinetics microcystin; biodegradation; microbial interactions; community structure; biodegradation kinetics
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MDPI and ACS Style

Manheim, D.; Cheung, Y.-M.; Jiang, S. The Effect of Organic Carbon Addition on the Community Structure and Kinetics of Microcystin-Degrading Bacterial Consortia. Water 2018, 10, 1523.

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