Application of Moving Bed Biofilm Reactor and Fixed Bed Hybrid Biological Reactor for Oilfield Produced Water Treatment: Influence of Total Dissolved Solids Concentration

Nicolas Lusinier, Isabelle Seyssiecq, Cecilia Sambusiti, Matthieu Jacob, Nicolas Lesage and Nicolas Roche
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Nicolas Lusinier: Aix-Marseille Université, CNRS, IRD, INRAE, Coll France, CEREGE, 13545 Aix en Provence, France
Isabelle Seyssiecq: Aix Marseille Université, CNRS, Centrale Marseille, M2P2, 13411 Marseille, France
Cecilia Sambusiti: Total SA, PERL–Pôle d’Etudes et de Recherche de Lacq, Pôle Economique 2, BP 47–RD 817, 64170 Lacq, France
Matthieu Jacob: Total SA, PERL–Pôle d’Etudes et de Recherche de Lacq, Pôle Economique 2, BP 47–RD 817, 64170 Lacq, France
Nicolas Lesage: Total SA, CSTJF, Avenue Larribau, 64000 Pau, France
Nicolas Roche: Aix-Marseille Université, CNRS, IRD, INRAE, Coll France, CEREGE, 13545 Aix en Provence, France

Energies, 2021, vol. 14, issue 21, 1-20

Abstract: This experimental paper deals with the development of a hybrid biological reactor for the treatment of a synthetic oilfield produced water under an increase in total dissolved solids (TDS) concentration. To comply with strengthening regulations concerning produced water discharge and peculiar produced water compositions, a moving bed biofilm reactor (MBBR) consisting in a combination of free activated sludge and moving biofilm supports was compared to a fixed bed hybrid biological reactor (FBHBR) consisting in a combination of free activated sludge and a fixed biofilm support. After a 216 days experimental period, the MBBR and the FBHBR were efficient to treat a synthetic produced water with chemical oxygen demand (COD) removal rate above 90% under an increase in TDS concentrations from 1.5 to 20 g·L −1 . Ecotoxicity measurements on freshwater and marine microorganisms revealed an absence of toxicity on treated waters. A decrease in bacterial diversity indices with respect to the inoculum was observed in both bioreactors. This suggests that the increase in TDS concentrations caused the predominance of a low number of bacterial species.

Keywords: oilfield produced water; hybrid biological reactor; total dissolved solids; bacterial diversity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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