| Autor: |
Ferreira ADDF; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Coelho DRB; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Dos Santos RVG; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Nascimento KS; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Presciliano FA; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., da Silva FP; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Campos JC; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., da Fonseca FV; School of Chemistry, Inorganic Processes Department, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. fabiana@eq.ufrj.br., Borges CP; COPPE - Chemical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Weschenfelder SE; COPPE - Chemical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. silvioweschenfelder@petrobras.com.br.; Petrobras Research Center, Rio de Janeiro, Brazil. silvioweschenfelder@petrobras.com.br. |
| Abstrakt: |
This work explored the use of ozonation and photoperoxidation before the microfiltration process to reduce fouling. Produced water was synthesized with salt, viscosifier, and surfactant. The additives influence on membrane fouling was evaluated. Photoperoxidation process led to an overall better performance than ozonation in terms of oil removal and fouling reduction. The maximum oil removal efficiency was 86%, obtained for emulsions with salt after 2 h of treatment (COD: H 2 O 2 ratio 1:1, UV dose of 965 J/m 2 ). The inclusion of chemical additives impaired the oxidative power of hydroxyl radicals leading to a moderate oil removal; however, they were still able to reduce membrane fouling, mainly in oil/water emulsions with viscosifier. Higher salt concentration promoted fouling resistance and also benefited the permeate quality. Cross-flow microfiltration process integrated with photoperoxidation was able to improve the permeate flux from 84 to 182 L/m 2 .h after 3 h of exposure to UV radiation, resulting in a permeate with less than 10 mg/L of oil content. Graphical abstract. |
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