Sampaio, Igor Carvalho FontesFerreira, Joalene de Azevedo SantosCrugeira, Pedro Jorge LouroOliveira, Ian M. da SilvaSantos, Jacson NunesMatos, Josilene Borges Torres LimaPinheiro, Antonio Luiz BarbosaAlmeida, Paulo Fernando de2024-04-092024-04-092023Sampaio, Igor Carvalho Fontes; Ferreira, Joalene de Azevedo Santos; Crugeira, Pedro Jorge Louro; Oliveira, Ian Mascena da Silva; Santos, Jacson Nunes; Matos, Josilene Borges Torres Lima; Pinheiro, Antonio Luiz Barbosa; Almeida, Paulo Fernando (2023). Oilfield carbonated produced water recycling coupled to exopolysaccharide transformation by Lelliottia amnigena. Waste and Biomass Valorization. ISSN 1877-2641. 15:3, p. 1309–13221877-2641http://hdl.handle.net/10198/29676It was tested the production of a viscous exopolysaccharide (EPS) by Lelliottia amnigena using different concentrations (10, 15, 25, 50 and 100%) of produced water (PW) and Dialyzed PW (DPW) at 100% concentration, with a nutrient medium based on glycerin and sucrose as carbon sources in 44 h batches. There was an increase in EPS recovery when used PW up to a concentration of 25%. The viscosity of the EPS solutions was maintained with DPW and up to 15% of PW, such a condition resulted in 9.34 gL− 1 of EPS, representing an increase of 84.9% compared to the control (P < 0.0001). The PW 15% increased the viscosity per produced liter by 114.3% (P < 0.0001). Scanning electron microscopy and Energy-dispersive X-ray spectroscopy analysis showed that EPS adsorbed mineral constituents of the substrate and its characterization by Fourier Transform Infrared Spectroscopy was similar to an external control of a commercial EPS produced by an Enterobacter A47 strain. PW at 15% becomes an alternative to increase the EPS production process and can contribute to the mitigation of environmental damage through sustainable PW management in the oilfield chain.engLelliottia amnigenaProduced waterExopolysaccharideRecyclingFT-IRjournal article10.1007/s12649-023-02249-71877-265X