EFFECT OF VARIOUS PRETREATMENTS ON ANAEROBIC BIODEGRADABILITY AND QUALITY MICROBIOLOGY OF WASTE ACTIVATED SLUDGE

  • S.E. Vigueras-Carmona División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec
  • G. Zafra-Jiménez División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec
  • M. García-Rivero División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec
  • M.A. Martínez-Trujillo División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec
  • J. Pérez-Vargas División de Ingeniería Química y Bioquímica, Tecnológico de Estudios Superiores de Ecatepec
Keywords: solubilization, pretreatment, pathogens, anaerobic biodegradation, methane

Abstract

In this paper was evaluated the effect of different pretreatments on the solubilization, biodegradability and microbiological quality of waste activated sludge. Six pre-treatments were assayed: thermal, alkaline, ultrasonic, thermal-alkaline, alkaline ultrasonic, ultrasonic-alkaline. Pretreatment with that achieved the highest solubilization was ultrasonic-alkaline pretreatment with 85% and this had the highest biodegradability of 65%. Besides, we observed a reactivation of pathogens in all cases, except thermal-alkaline, which implies a decrease in their microbiological quality and biosolids do not fulfill with the classification type A. The phenomenon of reactivation of pathogens may involve a review of the classification criteria of the biosolids or the inclusion of a parameter storage time prior to final disposal, which would raise the costs of disposal.

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Published
2020-03-18
How to Cite
Vigueras-Carmona, S., Zafra-Jiménez, G., García-Rivero, M., Martínez-Trujillo, M., & Pérez-Vargas, J. (2020). EFFECT OF VARIOUS PRETREATMENTS ON ANAEROBIC BIODEGRADABILITY AND QUALITY MICROBIOLOGY OF WASTE ACTIVATED SLUDGE. Revista Mexicana De Ingeniería Química, 12(2), 293-301. Retrieved from http://www.rmiq.org/ojs311/index.php/rmiq/article/view/1468
Section
Environmental Engineering

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