Eliminación/Degradación de Triazinas Mediante Biorreactor de Membrana con Post-Tratamiento de Ozonización
The aim of the research was to evaluate the removal of micropollutants in a combined system MBR + ozonation. The research was carried out in a MBR scale laboratory plant which was fed with synthetic wastewater, doped with simazine (SIM), atrazine (ATZ) and terbutilazine (TBZ). The MBR operational conditions were: hydraulic retention time (HRT) of 20 h, organic loading rate (OLR) of 0.23 KgCOD/KgSSV·day, sludge retention time (SRT) of 30 d, and flux of 5.5 LMH. Two ozone doses were tested: low dose (16 mg O3/L) and high dose (45 mg O3/L). The removal eficiency of organic matter was 96%. For the studied triazines, low biodegradation effiencies were reached by biological treatment (MBR): 57%, 53% and 63% for SIM, ATZ and TBZ, respectively. The complementary treatment of ozonation improved the quality of the effluents. At low ozonation dose the overall removal efficiencies increased to 95%, 92% and 96% for SIM, ATZ and TBZ, respectively. At high ozonization dose the overall removal efficiencies were 98%, 97% and 97 % for SIM, ATZ and TBZ, respectively, percentages slightly higher than those obtained at low dose. The results showed the combination of MBR + O3 is effective to remove micropollutants from wastewater, contributing to the preservation of a good ecological state of water bodies.
Keywords: Bioreactor, Membrane, Ozone, Triazines, Herbicides.
 AHMED, Mohammad Boshir, et al. Progress in the Biological and Chemical Treatment Technologies for Emerging Contaminant Removal from Wastewater: A Critical Review. Journal of Hazardous Materials, 2/5, 2017, vol. 323, Part A, pp. 274-298. ISSN 0304-3894.
 APHA, AWWA, WPCF, WEF.. American Public Health Association. ed., 22nd ed., 2012. Métodos Estándar Para El Examen De Agua Y Aguas Residuales, pp. 4500-O3 B-4-145.
 AQUINO, José M., et al. Treatment of Actual Effluents Produced in the Manufacturing of Atrazine by a Photo-Electrolytic Process. Chemosphere, 4, 2017, vol. 172, pp. 185- 192. ISSN 0045-6535.
 ASLAM, Muhammad, et al. Membrane Bioreactors for Wastewater Treatment: A Review of Mechanical Cleaning by Scouring Agents to Control Membrane Fouling. Chemical Engineering Journal, 1/1, 2017, vol. 307, pp. 897-913. ISSN 1385-8947.
 AZEVEDO, DD, et al. Monitoring of Priority Pesticides and Other Organic Pollutants in River Water from Portugal by Gas Chromatography-Mass Spectrometry and Liquid Chromatography-Atmospheric Pressure Chemical Ionization Mass Spectrometry. Journal of Chromatography A, MAY 19, 2000, vol. 879, no. 1, pp. 13-26. ISSN 0021- 9673.
 BERNHARD, M.; MÜLLER, J.and KNEPPER, T. P. Biodegradation of Persistent Polar Pollutants in Wastewater: Comparison of an Optimised Lab-Scale Membrane Bioreactor and Activated Sludge Treatment. Water Research, 2006, vol. 40, no. 18, pp. 3419-3428 SCOPUS.
 BUTTIGLIERI, G.; MIGLIORISI, L.and MALPEI, F. Adsorption and Removal at Low Atrazine Concentration in an MBR Pilot Plant. Water Science and Technology, 2011, vol. 63, no. 7, pp. 1334-1340. ISSN 0273-1223.
 CARTAGENA, P., et al. Reduction of Emerging Micropollutants, Organic Matter, Nutrients and Salinity from Real Wastewater by Combined MBR-NF/RO Treatment. Separation and Purification Technology, 2013, vol. 110, pp. 132-143 SCOPUS.
 HOU, L., et al. Ultrasound-Enhanced Magnetite Catalytic Ozonation of Tetracycline in Water. Chemical Engineering Journal, 2013, vol. 229, pp. 577-584 SCOPUS.
 IBÁÑEZ, M., et al. Removal of Emerging Contaminants in Sewage Water Subjected to Advanced Oxidation with Ozone. Journal of Hazardous Materials, 9/15, 2013, vol. 260, pp. 389-398. ISSN 0304-3894.
 JUDD, S. J. The Status of Industrial and Municipal Effluent Treatment with Membrane Bioreactor Technology. Chemical Engineering Journal, 12/1, 2016, vol. 305, pp. 37-45. ISSN 1385-8947.
 KARAOLIA, P., et al. Investigation of the Potential of a Membrane BioReactor Followed by Solar Fenton Oxidation to Remove Antibiotic-Related Microcontaminants. Chemical Engineering Journal, 2/15, 2017, vol. 310, Part 2, pp. 491-502. ISSN 1385-8947.
 KÖCK-SCHULMEYER, Marianne, et al. Occurrence and Behavior of Pesticides in Wastewater Treatment Plants and their Environmental Impact. Science of the Total Environment, 8/1, 2013, vol. 458–460, pp. 466-476. ISSN 0048-9697.
 KOVALOVA, L., et al. Elimination of Micropollutants during Post-Treatment of Hospital Wastewater with Powdered Activated Carbon, Ozone, and UV. Environmental Science and Technology, 2013, vol. 47, no. 14, pp. 7899-7908 SCOPUS.
 LUIS, P., et al. Effect of Membrane Filtration on Ozonation Efficiency for Removal of Atrazine from Surface Water. Industrial and Engineering Chemistry Research, 2011, vol. 50, no. 14, pp. 8686-8692 SCOPUS.
 LUO, Yunlong, et al. A Review on the Occurrence of Micropollutants in the Aquatic Environment and their Fate and Removal during Wastewater Treatment., 1 March 2014, 2014a. Available from . ISBN 0048-9697.
 LUO, Yunlong, et al. A Review on the Occurrence of Micropollutants in the Aquatic Environment and their Fate and Removal during Wastewater Treatment. Science of the Total Environment, 3/1, 2014b, vol. 473–474, pp. 619-641. ISSN 0048-9697.
 NAKADA, Norihide, et al. Removal of Selected Pharmaceuticals and Personal Care Products (PPCPs) and Endocrine-Disrupting Chemicals (EDCs) during Sand Filtration and Ozonation at a Municipal Sewage Treatment Plant. Water Research, 11, 2007, vol. 41, no. 19, pp. 4373-4382. ISSN 0043-1354.
 NAVARATNA, Dimuth; SHU, Liand JEGATHEESAN, Veeriah. Evaluation of Herbicide (Persistent Pollutant) Removal Mechanisms through Hybrid Membrane Bioreactors. Bioresource Technology, 1, 2016, vol. 200, pp. 795-803. ISSN 0960-8524.
 NEOH, Chin Hong, et al. Green Technology in Wastewater Treatment Technologies: Integration of Membrane Bioreactor with various Wastewater Treatment Systems. Chemical Engineering Journal, 1/1, 2016, vol. 283, pp. 582-594. ISSN 1385-8947.
 PRADO, Moriel, et al. Removal of Emerging Contaminant and Fouling Control in Membrane bioreactors by Combined Ozonation and Sonolysis. International Biodeterioration & Biodegradation, 4, 2017, vol. 119, pp. 577-586. ISSN 0964-8305.
 ROBLES-MOLINA, J., et al. Monitoring of Selected Priority and Emerging Contaminants in the Guadalquivir River and Other Related Surface Waters in the Province of Jaén, South East Spain. Science of the Total Environment, 2014, vol. 479-480, no. 1, pp. 247-257 SCOPUS.
 ROZAS, Oscar, et al. Organic Micropollutants (OMPs) Oxidation by Ozone: Effect of Activated Carbon on Toxicity Abatement. Science of the Total Environment, 7/15, 2017, vol. 590–591, pp. 430-439. ISSN 0048-9697.
 SHAHBEIG, H., et al. Pharmaceutical Wastewater Treatment using Membrane Bioreactor-Ozonation System. Water and Environment Journal, 2017, vol. 31, no. 1, pp. 57-63 Scopus.
 TAMBOSI, J. L., et al. Removal of Pharmaceutical Compounds in Membrane Bioreactors (MBR) Applying Submerged Membranes. Desalination, 2010, vol. 261, no. 1-2, pp. 148-156 SCOPUS.
 XIONG, Zhenglong; CHENG, Xiangand SUN, Dezhi. Pretreatment of Heterocyclic Pesticide Wastewater using Ultrasonic/Ozone Combined Process., May 2011, 2011. Available from http://www.sciencedirect.com/science/article/ pii/S1001074210604652. ISBN 1001-0742.