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Identification of the ‘Active’ Fraction and Metabolic Pathways in Trace Organic Contaminants Removal Using Stable Isotope Probing

By
Kartik Chandran
Kartik Chandran
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IWA Publishing
Volume
15
ISBN electronic:
9781780408286
Publication date:
September 2016

The widespread presence of trace organic contaminants (TOrC), such as the endocrine disrupting compound bisphenol-A (BPA), has been cause for growing concern due to persistence in the environment and potential ecological impacts. Despite progress made in understanding the removal of TOrC in biological wastewater treatment processes, there is still a lack of consensus regarding the identity of microorganisms active in biodegradation and the exact removal mechanisms involved. This research aimed to develop a clear understanding of the microbial ‘active’ fraction in activated sludge which is responsible for the assimilation of a selected TOrC, BPA. Through the use of DNA stable isotope probing (DNA-SIP), BPA assimilating organisms were identified. This active fraction of BPA assimilation included bacteria related to Sphingobium spp., Sphingomonas spp., Pussilimonas spp., and Variovorax spp.. Results from this work also confirm that prior or time-course exposure to BPA as well as bioreactor process conditions influence microbial community structure and function. Added understanding of TOrC removal mechanisms could be derived through continued investigation into microbial functions associated with BPA removal.

This title belongs to WERF Research Report Series

ISBN: 9781780408286 (eBook)

Identification of the ‘Active’ Fraction and Metabolic Pathways in Trace Organic Contaminants Removal Using Stable Isotope Probing
By: Kartik Chandran
DOI: https://doi.org/10.2166/9781780408286
ISBN (electronic): 9781780408286
Publisher: IWA Publishing
Published: 2016

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