NDLI: Ammonium removal from high-salinity oilfield-produced water: assessing the microbial community dynamics at increasing salt concentrations

Content Provider	Springer Nature Link
Author	Quartaroli, Larissa Silva, Lívia C. Fidélis Silva, Claudio Mudadu Lima, Helena Santiago Paula, Sergio Oliveira Oliveira, Valéria Maia Cássia S. da Silva, Marliane Kasuya, Maria Catarina M. Sousa, Maíra Paula Torres, Ana Paula R. Souza, Rodrigo Suhett Bassin, João Paulo Silva, Cynthia Canêdo
Copyright Year	2016
Abstract	Water generated during oil exploration is chemically complex and contains high concentrations of ammonium and, in some cases, high salinity. The most common way to remove ammonium from effluent is a biological process, which can be performed by different routes and different groups of microorganisms. However, the presence of salts in the effluents could be an inhibiting factor for biological processes, interfering directly with treatment. This study aimed to evaluate changes in the profile of a microbial community involved in the process of ammonium removal when subjected to a gradual increase of salt (NaCl), in which the complete inhibition of the ammonium removal process occurred at 125 g L−1 NaCl. During the sludge acclimatization process, samples were collected and submitted to denaturing gradient gel electrophoresis (DGGE) and massive sequencing of the 16S ribosomal RNA (rRNA) genes. As the salt concentration increased in the reactor, a change in the microbial community was observed by the DGGE band profiles. As a result, there was a reduction in the presence of bacterial populations, and an increase in archaeal populations was found. The sequencing data suggested that ammonium removal in the reactor was carried out by different metabolic routes by autotrophic nitrifying bacteria, such as Nitrosococcus, Nitrosomonas, Nitrosovibrio, Nitrospira, and Nitrococcus; ammonium-oxidizing archaea Candidatus nitrosoarchaeum; ANAMMOX microorganisms, such as Candidatus brocadia, Candidatus kuenenia, and Candidatus scalindua; and microorganisms with the potential to be heterotrophic nitrifying, such as Paracoccus spp., Pseudomonas spp., Bacillus spp., Marinobacter sp., and Alcaligenes spp.
Starting Page	859
Ending Page	870
Page Count	12
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	101
Issue Number	2
e-ISSN	14320614
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-11-04
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Microbial diversity Nitrification Heterotrophic nitrification 16S rRNA gene survey Microbiology Microbial Genetics and Genomics Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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