Sampaio, Igor Carvalho FontesCrugeira, Pedro Jorge LouroFerreira, Joalene de Azevedo SantosSantos, Jacson NunesMatos, Josilene Borges Torres LimaPinheiro, Antonio Luiz BarbosaChinalia, Fabio AlexandreAlmeida, Paulo Fernando de2022-05-162022-05-162022Sampaio, Igor Carvalho Fontes; Crugeira, Pedro Jorge Louro; Ferreira, Joalene de Azevedo Santos; Santos, Jacson Nunes dos; Matos, Josilene Borges Torres Lima; Pinheiro, Antonio Luiz Barbosa; Chinalia, Fabio Alexandre; Almeida, Paulo Fernando de (2022). Up‐recycling oil produced water as the media‐base for the production of xanthan gum. Biopolymers. ISSN 1097-0282. p. 1-91097-0282http://hdl.handle.net/10198/25464Produced water (PW) and crude glycerin (CG) are compounds overproduced by the oil and biodiesel industry and significant scientific efforts are being applied for properly recycling them. The aim of this research is to combine such industrial byproducts for sustaining the production of xanthan by Xanthomonas campestris. Xanthan yields and viscosity on distinct PW ratios (0, 10, 15, 25, 50, 100) and on 100% dialyzed PW (DPW) in shaker batch testing identified DPW treatment as the best approach for further bioreactor experiments. Such experiments showed a xanthan yield of 17.3 g/L within 54 h and a viscosity of 512 mPa s. Physical-chemical characterization (energy dispersive X-ray spectroscopy, scanning electron microscopy and Raman spectroscopy) showed similarities between the produced gum and the experimental control. This research shows a clear alternative for upcycling high salinity PW and CG for the generation of a valued bioproduct for the oil industry.porCrude glycerinProduced waterReuseStirred-tank bioreactorXanthan gumjournal article10.1002/bip.234880006-3525