Oxygen exposure effects on the dechlorinating activities of a trichloroethene-dechlorination microbial consortium

Document Type

Article

Publication Date

1-1-2017

Abstract

The aim of this work was to study the effects of the presence of oxygen on the dechlorination of trichloroethene by a microbial consortium containing D. mccartyi. The 16S rRNA and reductive dechlorination genes of the functional bacteria and the non-dechlorinators were monitored. Exposing the consortium to oxygen altered the overall biotransformation rate of the dechlorination process, biotransformation processes prolonged with oxygen concentrations changing from 0 to 7.2 mg/L, however, trichloroethylene was eventually dechlorinated to ethene. The qPCR analyses revealed that the D. mccartyi strains containing the tceA gene were less sensitive to exposure to oxygen than were the D. mccartyi strains containing the vcrA gene. High-throughput sequencing by Illumina MiSeq indicated that the non-dechlorinating organisms were probably crucial to scavenge the oxygen to protect D. mccartyi from being damaged.

Identifier

85014494218 (Scopus)

Publication Title

Bioresource Technology

External Full Text Location

https://doi.org/10.1016/j.biortech.2017.02.112

e-ISSN

18732976

ISSN

09608524

PubMed ID

28274623

First Page

98

Last Page

105

Volume

240

Grant

41372236

Fund Ref

National Natural Science Foundation of China

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