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6CCVD Research

Electrooxidation Using Nb/BDD as Post-Treatment of a Reverse Osmosis Concentrate in the Petrochemical Industry

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2019-03-06
JournalInternational Journal of Environmental Research and Public Health
AuthorsSalatiel Wohlmuth da Silva, Carla Denize Venzke, JĆŗlia Bitencourt Welter, Daniela Eduarda Schneider, Jane Zoppas Ferreira
InstitutionsUniversidade Feevale, Universidade Federal do Rio Grande do Sul
Citations17

Abstract

Section titled ā€œAbstractā€

This work evaluated the performance of an electrochemical oxidation process (EOP), using boron-doped diamond on niobium substrate (Nb/BDD), for the treatment of a reverse osmosis concentrate (ROC) produced from a petrochemical wastewater. The effects of applied current density (5, 10, or 20 mAĀ·cmāˆ’2) and oxidation time (0 to 5 h) were evaluated following changes in chemical oxygen demand (COD) and total organic carbon (TOC). Current efficiency and specific energy consumption were also evaluated. Besides, the organic byproducts generated by EOP were analyzed by gas chromatography coupled to mass spectrometry (GC-MS). The results show that current densities and oxidation time lead to a COD and TOC reduction. For the 20 mAĀ·cmāˆ’2, changes in the kinetic regime were found at 3 h and associated to the oxidation of inorganic ions by chlorinated species. After 3 h, the oxidants act in the organic oxidation, leading to a TOC removal of 71%. Although, due to the evolution of parallel reactions (O2, H2O2, and O3), the specific energy consumption also increased, the resulting consumption value of 66.5 kWĀ·hĀ·kgāˆ’1 of COD is considered a low energy requirement representing lower treatment costs. These results encourage the applicability of EOP equipped with Nb/BDD as a treatment process for the ROC.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2015 - Application of reverse osmosis to petrochemical industry wastewater treatment aimed at water reuse [Crossref]
  2. 2016 - Removal of recalcitrant organic matter content in wastewater by means of AOPs aiming industrial water reuse [Crossref]
  3. 2017 - Electrokinetic treatment of high saline petrochemical wastewater: Evaluation and scale-up [Crossref]
  4. 2017 - The combined effect of ultrasonic and microwave pre-treatment on bio-methane generation from co-digestion of petrochemical wastewater [Crossref]
  5. 2014 - Advanced treatment of refractory organic pollutants in petrochemical industrial wastewater by bioactive enhanced ponds and wetland system [Crossref]
  6. 2013 - Electrochemical treatment of fresh, brine and saline produced water generated by petrochemical industry using Ti/IrO2-Ta2O5 and BDD in flow reactor [Crossref]
  7. 2010 - Recycle unit wastewater treatment in petrochemical complex using reverse osmosis process [Crossref]
  8. 2015 - Reuse of reverse osmosis concentrate in textile and dyeing industry by combined process of persulfate oxidation and lime-soda softening [Crossref]
  9. 2015 - Novel technologies for reverse osmosis concentrate treatment: A review [Crossref]
  10. 2014 - Photo-assisted electrochemical treatment of municipal wastewater reverse osmosis concentrate [Crossref]

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