Evaluation of a pilot aerobic reactor with polyetilenterephtalate (PET) as support material for dairy wastewater treatment


  • Marcelo Muñoz Escuela Politécnica Nacional
  • Jessica Reina Escuela Politécnica Nacional
  • María Belén Aldás Escuela Politécnica Nacional




Wastewater, aerobic reactor, dairy industry, PET


A pilot aerobic horizontal plug flow reactor filled with pieces of PET (polyethylene terephthalate), from plastic bottles was installed for treatment of a synthetic substrate prepared from lactic whey with COD values of 800 to 2100 mg/L. A bacterial inoculum previously acclimated to the substrate was used. Organic material removal efficiencies of 62.2%, 85% y 94% were obtained with retention times of 5.14, 6.01 and 8.01 hours, and with volumetric organic loads (Lv) of 7.68, 6.19 and 4.61 kg/day.m3, respectively. Also, the kinetic mass transfer constant (k) was calculated and it presented a value of 0.02 m/day. On the other hand, an F/M ratio of 0.4 was determined, indicating that the process had a similar performance to an extended aeration system. Finally, the biomass generated inside the reactor was analyzed, obtaining a value of 11560 mg /L, which is a higher value than those of conventional systems.



Download data is not yet available.


Alvis, C. (2015). Evaluación del Sistema de Tratamiento de Aguas Residuales del Complejo Urbanístico Barcelona de Indias. Tesis de titulación de Maestría en Ingeniería Civil, Escuela Colombiana de Ingeniería Julio Gravito, 58 pp.
Arango Bedoya O., Sanches, L. (2009). Tratamiento de aguas residuales de la industria láctea en sistemas anaerobios tipo UASB, Revista Facultad de Ciencias Agropecuarias, (7), 2, 24-31.
Baecheler, J., Zambrano, E., Urrutia, H. (2001). Estudio de la cinética de crecimiento de biopelícula bacterianas aplicadas en el tratamiento de riles, XIV Congreso de Ingeniería Sanitaria y Ambiental AIDIS. Santiago, Chile.
Carta-Escobar, F., Pereda-Marin, J., Álvarez-Mateos, P., Romero-Guzmán, F., Durán-Barrantes, M. M., & Barriga-Mateos, F. (2004). Aerobic purification of dairy wastewater in continuous regime: Part I: Analysis of the biodegradation process in two reactor configurations. Biochemical engineering journal, 21(2), 183-191.
Centro de Producción Más Limpia (CPMLN). 2003. Manual de Buenas Prácticas Operativas de Producción Más Limpia para la Industria Láctea. Recuperado el 15 de septiembre de 2015 de http://www.mific.gob.ni/Portals/0/Documentos%20MIFIC/Manual%20Buenas%20Practicas%20Ambientales%20en%20Lacteas.pdf
Kourkoutas, Y. B. (2004). Immobilization technologies and support materials suitable in alcohol beverages production: a review. Food Microbiology, (21): 377- 397.
Kushwaha, J. P., Srivastava, V. C., & Mall, I. D. (2011). An overview of various technologies for the treatment of dairy wastewaters. Critical reviews in food science and nutrition, 51(5), 442-452.
Lapo, B., C. (2014) Estudio de medios de soporte para crecimiento bacteriano, aplicado al tratamiento biológico aerobio de aguas residuales. Tesis de titulación de Maestría en Ingeniería Ambiental, Escuela Politécnica Nacional, 105 pp.
Lateef, A., Chaudhry, M. N., & Ilyas, S. (2013). Biological treatment of dairy wastewater using activated sludge. Science Asia, 39(2), 179-185.
López, P., & Harnisth, A. (2016). Electrocoagulación de aguas residuales de la industria láctea. Enfoque UTE, 7(1), 13–21.
Mara, D., (1978) Sewage treatment in hot climates, John Wiley & Sons. New York, 166 pp.
Mohseni-Bandpi, A., & Bazari, H. (2004). Biological treatment of dairy wastewater by sequencing batch reactor. Journal of Environmental Health Science & Engineering, 1(2), 65-69.
Muñoz, M., Fuentes, V., & Aldás, M. B. (2016). Reactor anaerobio de flujo horizontal con medio de soporte de polietilentereftalato. Enfoque UTE, 7(2), 97–108.
Oliviera, E. (2001). Tratamiento biológico del agua residual. Recuperado el 12 de septiembre de 2015, de http://www.tdx.cat/bitstream/handle/10803/5909/12Mjkm12de18.pdf;jsessionid=DFB8941A94B63943AAFD0CA543C6B6EF.tdx1?sequence=12;Capítulo 7.
Prócel, D., Posligua, P., & Banchón, C. (2016). Biodegradación de contaminantes orgánicos de la industria láctea. Enfoque UTE, 7(1), 22–32.
Shete, B. S., & Shinkar, N. P. (2013). Comparative study of various treatments for dairy industry wastewater. IOSR J Eng, 3, 42-47.
Sirianuntapiboon, S., Jeeyachok, N., & Larplai, R. (2005). Sequencing batch reactor biofilm system for treatment of milk industry wastewater. Journal of Environmental Management, 76(2), 177-183.



How to Cite

Muñoz, M., Reina, J., & Aldás, M. B. (2016). Evaluation of a pilot aerobic reactor with polyetilenterephtalate (PET) as support material for dairy wastewater treatment. Enfoque UTE, 7(4), pp. 31 - 42. https://doi.org/10.29019/enfoqueute.v7n4.112