Abstract
To improve denitrification and phosphorus removal in VFCWs, the French company SCIRPE has developed a patented process called Azoé® which comprises biological pre-treatment on a trickling filter followed by two stages of partially saturated vertical flow filters planted with reeds. Phosphorus removal is carried out by addition of FeCl3 at the outlet of the biological trickling filter. Phosphorus thus precipitated accumulates mainly on the surface of the first filter in the form of a sludge layer. After several years of operation, this surface layer represents a stock of phosphorus potentially mobilizable as a function of the biophysicochemical conditions of the environment. However the fate of organic and mineral micropollutants, (pharmaceutical residues, pesticides, metals, etc.) in the system is poorly known. In the present study, the performance of these systems was studied by monitoring an Azoé® plant in operation. The results confirmed the very good efficiency in carbon and nitrogen treatment, the good stability of phosphorus retention, and a high rate of removal or retention of most micropollutants analyzed.
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References
Ávila, C., et al.: Emerging organic contaminant removal in a full-scale hybrid constructed wetland system for wastewater treatment and reuse. Ecol. Eng. 80, 108–116 (2015)
Bellier, N., Chazarenc, F., Comeau, Y.: Phosphorus removal from wastewater by mineral apatite. Water Res. 40(15), 2965–2971 (2006)
Caravelli, A.H., Contreras, E.M., Zaritzky, N.E.: Phosphorous removal in batch systems using ferric chloride in the presence of activated sludges. J. Hazard. Mater. 177(1–3), 199–208 (2010)
Kim, B., Gautier, M., Gourdon, R.: Physical-chemical characterization of solid materials sampled from a partially flooded vertical flow constructed wetland. Water Sci. Technol. 68(10), 2257–2263 (2013)
Kim, B., Gautier, M., Prost-Boucle, S., Molle, P., Michel, P., Gourdon, R.: Performance evaluation of partially saturated vertical-flow constructed wetland with trickling filter and chemical precipitation: a field study. Ecological Engg. 71, 41–47 (2014)
Kock-Schulmeyer, M., et al.: Occurrence and behavior of pesticides in wastewater treatment plants and their environmental impact. Sci. Total Environ. 458–460, 466–476 (2013)
Molle, P.: French vertical flow constructed wetlands: a need of a better understanding of the role of the deposit layer. Water Sci. Technol. 69(1), 106–112 (2014)
Szabo, A., Takacs, I., Murthy, S., Daigger, G.T., Licsko, I., Smith, S.: Significance of design and operational variables in chemical phosphorus removal. Water Environ. Res. 80(5), 407–416 (2008)
Thistleton, J., Berry, T.A., Pearce, P., Parsons, S.A.: Mechanisms of chemical phosphorus removal II: iron (III) salts. Process Saf. Environ. Prot. 80(5), 265–269 (2002)
Verlicchi, P., Zambello, E.: How efficient are constructed wetlands in removing pharmaceuticals from untreated and treated urban wastewaters? A review. Sci. Total Environ. 470–471, 1281–1306 (2014)
Acknowledgments
The authors wish to thank SCIRPE Company and French CIFRE (Conventions Industrielles de Formation par la REcherche) for funding this research project.
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Gourdon, R., Kania, M., Gautier, M., Kim, B., Michel, P. (2018). Treatment of Domestic Wastewater from Small Cities on Vertical Flow Constructed Wetlands (VFCWs). In: Tran-Nguyen, HH., Wong, H., Ragueneau, F., Ha-Minh, C. (eds) Proceedings of the 4th Congrès International de Géotechnique - Ouvrages -Structures. CIGOS 2017. Lecture Notes in Civil Engineering , vol 8. Springer, Singapore. https://doi.org/10.1007/978-981-10-6713-6_107
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DOI: https://doi.org/10.1007/978-981-10-6713-6_107
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