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Environmental Science and Pollution Research

, Volume 26, Issue 2, pp 1103–1112 | Cite as

Control of emerging contaminants by the combination of electrochemical processes and membrane bioreactors

  • Benny Marie B. Ensano
  • Laura Borea
  • Vincenzo NaddeoEmail author
  • Mark Daniel G. de Luna
  • Vincenzo Belgiorno
Water Industry: Water-Energy-Health Nexus

Abstract

This study investigates the removal of selected pharmaceuticals, as recalcitrant organic compounds, from synthetic wastewater using an electro-membrane bioreactor (eMBR). Diclofenac (DCF), carbamazepine (CBZ), and amoxicillin (AMX) were selected as representative drugs from three different therapeutic groups such as anti-inflammatory, anti-epileptic, and antibiotic, respectively. An environmentally relevant concentration (10 μg/L) of each compound was spiked into the synthetic wastewater, and then, the impact of appending electric field on the control of membrane fouling and the removal of conventional contaminants and pharmaceutical micropollutants were assessed. A conventional membrane bioreactor (MBR) was operated as a control test. A reduction of membrane fouling was observed in the eMBR with a 44% decrease of the fouling rate and a reduction of membrane fouling precursors. Humic substances (UV254), ammonia nitrogen (NH4-N), and orthophosphate (PO4-P) showed in eMBR removal efficiencies up to 90.68 ± 4.37, 72.10 ± 13.06, and 100%, respectively, higher than those observed in the MBR. A reduction of DCF, CBZ, and AMX equal to 75.25 ± 8.79, 73.84 ± 9.24, and 72.12 ± 10.11%, respectively, was found in the eMBR due to the enhanced effects brought by electrochemical processes, such as electrocoagulation, electrophoresis, and electrooxidation.

Keywords

Diclofenac (DCF) Carbamazepine (CBZ) Amoxicillin (AMX) Pharmaceuticals Electro-membrane bioreactor (eMBR) Membrane fouling Fouling precursors 

Notes

Acknowledgments

This study was partially funded by the FARB project of the University of Salerno (UNISA). The authors would like to acknowledge the Sanitary and Environmental Engineering Division (SEED) Laboratory of Civil Engineering Department in UNISA for providing the facilities and research fund. We also thank the University of the Philippines-Diliman and the Engineering Research and Development for Technology (ERDT) through the Department of Science and Technology-Philippines for the Ph.D. Scholarship Grant and Sandwich Program being awarded to BMB Ensano. The authors also deeply appreciate the following individuals who helped for the completion of the experiment: Dr. A. Farina, P. Napodano, and E. Apolito for their technical assistance in the SEED laboratory and Prof. E. Reverchon and Dr. M. Scognamiglio for their laboratory support in zeta potential and PSD analyses at the Laboratory of Chemical Engineering of Industrial Engineering Department in UNISA. The authors gratefully thank GE/Zenon Membrane Solution for donating the membrane modules used in the laboratory scale plant. VN, VB, and MDL developed the research idea and planned the research activities; BME and LB carried out the research activities and prepared the manuscript; and VN and MDL reviewed the manuscript and supervised the research activities. VB reviewed the final draft of the manuscript.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Environmental Engineering Program, National Graduate School of EngineeringUniversity of the PhilippinesQuezon CityPhilippines
  2. 2.Sanitary Environmental Engineering Division (SEED), Department of Civil EngineeringUniversity of SalernoFiscianoItaly
  3. 3.Department of Chemical EngineeringUniversity of the PhilippinesQuezon CityPhilippines

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