Impact of Bioaugmentation on the Bioremediation of Saline-Produced Waters Supplemented with Anaerobic Digestate

Aurélien Parsy, Cecilia Sambusiti, Claire Gassie, Patrick Baldoni-Andrey, Frédéric Périé and Rémy Guyoneaud ()
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Aurélien Parsy: Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM UMR5254, Environmental Microbiology and Chemistry, 64000 Pau, France
Cecilia Sambusiti: TotalEnergies, CSTJF–Avenue Larribau, 64018 Pau, France
Claire Gassie: Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM UMR5254, Environmental Microbiology and Chemistry, 64000 Pau, France
Patrick Baldoni-Andrey: TotalEnergies, PERL–Pôle D’Etudes et de Recherche de Lacq, Pôle Economique 2, BP 47–RD 817, 64170 Lacq, France
Frédéric Périé: TotalEnergies, CSTJF–Avenue Larribau, 64018 Pau, France
Rémy Guyoneaud: Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM UMR5254, Environmental Microbiology and Chemistry, 64000 Pau, France

Sustainability, 2023, vol. 15, issue 3, 1-18

Abstract: Bioremediation of produced waters has been widely investigated in the last decades. More recently, microalgae-based treatments have been developed to produce biomass. The objective of this study was to determine, at lab scale, the remediation efficiency of three origin of microorganisms: a consortium of three halotolerant and halophilic microalgae and their associated bacteria, bacteria from liquid digestate, and aromatic-degrading bacteria selected to perform bioaugmentation. The medium was composed of artificial oil-produced water and seawater, and contained nutrients from liquid digestate. In order to identify what plays a role in nitrogen, chemical oxygen demand, and aromatics compounds elimination, and to determine the effectiveness of bioaugmentation to treat this mix of waters, 16S rRNA analyses were performed. Combination of microorganisms from different origins with the selected aromatic-degrading bacteria were also realized, to determine the effectiveness of bioaugmentation to treat these waters. Each population of microorganisms achieved similar percentage of removal during the biological treatment, with 43–76%, 59–77%, and 86–93% of elimination for ammonium, chemical oxygen demand, and aromatic compounds (with 50% of volatilization), respectively, after 7 days, and up to with 100%, 77%, and 99% after 23 days, demonstrating that in the case of this produced water, bioaugmentation with the specialized aromatic-degrading bacteria had no significant impact on the treatment. Regarding in detail the populations present and active during the tests, those from genus Marinobacter always appeared among the most active microorganisms, with some strains of this genus being known to degrade aromatic compounds.

Keywords: ammonium; aromatic compounds; aromatic-degrading bacteria; chemical oxygen demand; digestate bacteria; microalgae; microbial diversity; photosynthetic production; RNA analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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