Retention efficiency of the sewage treatment plant of Trenque Lauquen city (Buenos Aires)

  • Alberto Pilati Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa
  • Germán Fresia

DOI:

https://doi.org/10.19137/semiarida.2021(01).25-34

Keywords:

total nitrogen; total phosphorus; nitrate; ammonia; phosphate; chlorophyll; winter; summer;

Abstract

The Trenque Lauquen sewage treatment plant was created in 1992 when the population was substantially smaller. The objective was to determine its retention efficiency since its effluents could cause a strong negative impact on the environment. To evaluate the efficiency under extreme temperature conditions, samples of total suspended solids (TSS), chlorophyll, and total nitrogen (TN) and phosphorus (TP) were taken throughout the plant in winter and summer. The Imhoff well retained 2437 % TSS and always retained 100 % of the inorganic suspended solids. Although the plant retained between 1120 % TN and 1117 % TP, the plant discharge values (2341 mgNT/L and 3.94.1 mgPT/L) still exceed the law allowance. Variations in retention between contrasting seasons were mainly due to an increase in biological activity in summer. Retention efficiency could be improved by the use of phytoremediation, plant maintenance and expansion of existing facilities.

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Author Biography

Alberto Pilati, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa

Profesor Adjunto Iniciación en la Investigación. Departamento de Ciencias Biológicas

Profesor Adjunto Ecología II. Departamento de Recursos Naturales

References

APHA. (1992). Standard Method for the examination of water y wastewater, Edición 18, Washington D.C.1022 p.

Arar, E. J. & Collins, G. B. (1997). In vitro determinationof chlorophyll a and pheohitin­a in marine andfreshwater algae by fluorescence. Método EPA445 www.epa.gov/nerlcwww/ordmeth.htm

Chung, A. K. C., Wu, Y., Tam, N. F. Y. & Wong, M. H.(2008). Nitrogen and phosphate mass balance ina sub­surface flow constructed wetland for treatingmunicipal wastewater. Ecological Engineering, 32,81­-89.

Crespi, R., Plevich, O., Thuar, A., Grosso, L.,Rodríguez, C., Ramos, D., Barotto, O., Sartori, M.,Covinich, M. y Boehler, J. (2007). Manejo de aguas residuales urbanas. Universidad Nacional de Río Cuarto. Córdoba, Argentina. 23 p.

Crites, R. & Tchobanoglous, G. (2000). Tratamiento de aguas residuales en pequeñas poblaciones. McGraw Hill: Colombia. De Lora, F. & Miró, J. (1978). Tratamiento y depuración de aguas residuales. En F. De Lora & J. Miró (Eds.) Técnicas de defensa del medio ambiente(pp. 56­79). Barcelona, España: Ed. Labor.

EPA. (1993). ESS Method 340.2: Total Suspended Solids, Mass Balance (Dried at 103–105 ˚;C)Volatile Suspended Solids (Ignited at 550˚;C). http://www.epa.gov/glnpo/lmmb/methods/methd340.pdf (14/09/2017)

EPA. (2004). Local limits Development Guidance. EPA833­R­04­002A July 2004.EPA. (2008). Municipal Nutrient Removal TechnologiesReference Document. EPA 832­R­08­006,September 2008.EPA. (2009). Nutrient control design manual.EPA/600/R­09/012 January 2009.

FAO. (2016). Uso del agua.http://www.fao.org/nr/water/aquastat/countries_regions/Profile_segments/ARG­WU_eng.stm(2/10/2017).

Gebremariam, S. Y. & Beutel, M. C. (2008). Nitrateremoval and DO levels in batch wetlandmesocosms: Cattail (Typhaspp.) versus bulrush(Scirpusspp.). Ecological Engineering, 34, 1­6.

Hammer, Ø., Harper, D. A. T. & Ryan, P. D. (2001).PAST: Paleontological Statistics Software Packagefor Education and Data Analysis. PalaeontologiaElectronica, 4(1), 9.INDEC. (2010). Censo Nacional de Población, Hogaresy Viviendas. www.censo2010.indec.gov.ar(8/08/2020).INTA. (2017). Sistema de Información y Gestión Agrometeorológico. http://siga2.inta.gov.ar/en/datosdiarios/ (19/19/2017).

Laws, E. A. (1993). Aquatic pollution. An introductorytext. New York: John Wiley & Sons.

Margalef, R. (1986). Ecología. Barcelona, España: Ed.Omega. OPS/CEPIS. (2005). Guía para el diseño de tanquessépticos, tanques Imhoff y lagunas de estabilización.OPS/CEPIS/05. 163. Lima Perú.

Ortega Sastriques, F. y Orellana Gallego, R. (2007). El riego con aguas de mala calidad en la agricultura urbana. Aspectos a considerar. II. Aguas residuales urbanas. Revista Ciencia Técnica OSN. (1973). Manual de laboratorio para técnicos sanitarios. Argentina.

Polanco, C. E. & Pilati, A. (2014). Retención de nitrógeno y fósforo en la planta de tratamiento cloacal sur, Santa Rosa, La Pampa. Libro Actas IV Congreso Pampeano del Agua (pp. 23­31). Santa Rosa, La pampa, Argentina. Schulz, C. J. (1995). Agua y medio ambiente.COSYPRO Ltda. Quemú­Quemú (L.P.). Wetzel, R. G. (2001). Limnology. Lake and riverecosystems. 3ra Edición. Academic Press.

Yousefi, Z. & A. Mohseni­Bandpei. 2010. Nitrogen andphosphorus removal from wastewater bysubsurface wetland planted with Iris pseudacorus.Ecological Engineering, 36, 777­782.Zar, J. H. (1999). Biostatistical Analysis. 4th ed.,Prentice­Hall, Inc., Upper Saddle River, NJ.

Published

2021-03-12

Issue

Section

Artículos Científicos y Técnicos