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Modeling carbonate/bicarbonate and nitrate disturbance during secondary effluent disinfection by UV/H2O2 and UV/ozone.
Cavalcante, Rodrigo Pereira; Malvestiti, Jacqueline Aparecida; Júnior, José Paulo Diogo; Dantas, Renato Falcao.
Afiliación
  • Cavalcante RP; School of Technology, University of Campinas - UNICAMP, Paschoal Marmo 1888, Limeira, SP 13484-332, Brazil E-mail: rodrigpc@unicamp.br.
  • Malvestiti JA; School of Technology, University of Campinas - UNICAMP, Paschoal Marmo 1888, Limeira, SP 13484-332, Brazil E-mail: rodrigpc@unicamp.br; Center of Nuclear Energy in Agriculture, University of São Paulo, Av. Centenário 303, Piracicaba, SP 13400-970, Brazil.
  • Júnior JPD; School of Technology, University of Campinas - UNICAMP, Paschoal Marmo 1888, Limeira, SP 13484-332, Brazil E-mail: rodrigpc@unicamp.br.
  • Dantas RF; School of Technology, University of Campinas - UNICAMP, Paschoal Marmo 1888, Limeira, SP 13484-332, Brazil E-mail: rodrigpc@unicamp.br.
Water Sci Technol ; 86(11): 2943-2962, 2022 Dec.
Article en En | MEDLINE | ID: mdl-36515198
The disinfection of effluents has been considered the main step to inactivate pathogenic organisms to prevent the spread of waterborne diseases. The variation in the matrix composition can lead to the use of inadequate oxidant dose and disturb a correct treatment. The objective of this study was to develop a simple and practical mathematical model to simulate the disturbance of inorganic anions (CO32-/HCO3- and NO3-) during secondary effluent disinfection by UV/H2O2 and UV/O3. The pathogenic agents chosen for this study were total coliforms and E. coli. To build the mathematical model, a modification of the Chick model (referred to as 'Modified Chick Model') was proposed by employing a weighted average in the calculation of the kinetic constant. Both treatments were affected by the presence of the anions. However, with the highest NO3- concentration, less inhibition of disinfection was observed in the UV/H2O2. The use of the arithmetic means to calculate the value of k, as indicated by the Chick model, demonstrates a lesser precision in the prediction of the microorganisms' concentrations. On the other hand, using the Modified Chick Model, a better prediction of the inactivation of the microorganisms was obtained, which can be confirmed by the validation performed.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Purificación del Agua Tipo de estudio: Prognostic_studies Idioma: En Revista: Water Sci Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Purificación del Agua Tipo de estudio: Prognostic_studies Idioma: En Revista: Water Sci Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido