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Advisor(s)
Abstract(s)
It 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.
Description
Keywords
Lelliottia amnigena Produced water Exopolysaccharide Recycling FT-IR
Citation
Sampaio, 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. 1309–1322
Publisher
Springer Nature