Wastewater Disinfection by Peracetic Acid: Assessment of Models for Tracking Residual Measurements and Inactivation

Santoro, Domenico; Gehr, Ronald; Bartrand, Timothy A.; Liberti, Lorenzo; Notarnicola, Michele; Dell'Erba, Adele; Falsanisi, Dario; Haas, Charles N.

doi:10.2175/106143007x156817

Cited by 53 publications

(27 citation statements)

References 37 publications

(57 reference statements)

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“…In our case, our objective was to illustrate a new modeling methodology for simulating wastewater disinfection processes under kinetic uncertainty. We decided to use the 13 kinetic experiments published by Santoro et al 9 in which the E. coli inactivation and the PAA decay kinetics in a secondary settled wastewater effluent affected by wastewater quality variability were simultaneously measured. The assumption that 13 kinetic experiments were quantitatively sufficient was also verified by checking the sensitivity of the correlation matrix against the number of kinetic experiments considered.…”

Section: Introductionmentioning

confidence: 99%

Nondeterministic Computational Fluid Dynamics Modeling of Escherichia coli Inactivation by Peracetic Acid in Municipal Wastewater Contact Tanks

Santoro

Crapulli

Raisee

et al. 2015

Environ. Sci. Technol.

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Wastewater disinfection processes are typically designed according to heuristics derived from batch experiments in which the interaction among wastewater quality, reactor hydraulics, and inactivation kinetics is often neglected. In this paper, a computational fluid dynamics (CFD) study was conducted in a nondeterministic (ND) modeling framework to predict the Escherichia coli inactivation by peracetic acid (PAA) in municipal contact tanks fed by secondary settled wastewater effluent. The extent and variability associated with the observed inactivation kinetics were both satisfactorily predicted by the stochastic inactivation model at a 95% confidence level. Moreover, it was found that (a) the process variability induced by reactor hydraulics is negligible when compared to the one caused by inactivation kinetics, (b) the PAA dose required for meeting regulations is dictated equally by the fixed limit of the microbial concentration as well as its probability of occurrence, and (c) neglecting the probability of occurrence during process sizing could lead to an underestimation of the PAA dose required by as much as 100%. Finally, the ND-CFD model was used to generate sizing information in the form of probabilistic disinfection curves relating E. coli inactivation and probability of occurrence with the average PAA dose and PAA residual concentration at the outlet of the contact tank.

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Section: Introductionmentioning

confidence: 99%

Nondeterministic Computational Fluid Dynamics Modeling of Escherichia coli Inactivation by Peracetic Acid in Municipal Wastewater Contact Tanks

Santoro

Crapulli

Raisee

et al. 2015

Environ. Sci. Technol.

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“…Comercialmente o APA é encontrado nas concentrações de 5%, 15% e 45% (m/v), porém acima de 15% apresenta risco de explosão devido a sua instabilidade e reatividade, tornandose mais conveniente sua comercialização em concentrações mais baixas e com quantidades maiores de estabilizantes como o agente quelante 8-hidroxiquinolina e o agente sequestrante pirofosfato de sódio, que removem traços de metais que aceleram a decomposição de peróxidos (BLOCK, 2001;SANTORO et al, 2007). A Tabela 1 apresenta as características físico-químicas do APA na sua forma comercial de 15%.…”

Section: H2so4unclassified

Utilização do ácido peracético na desinfecção de esgoto sanitário: uma revisão

et al. 2012

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ResumoA utilização do Ácido Peracético (APA) na desinfecção de esgoto sanitário vem sendo pesquisada por diversos autores, principalmente em países europeus, onde os padrões microbiológicos para lançamento de efluentes em corpos hídricos são mais rigorosos e a moderação no uso do cloro, devido à formação dos trihalometanos, é recomendada. Nesta perspectiva, este trabalho apresenta uma compilação de pesquisas aplicadas diretamente ao saneamento ambiental, como também de pesquisas relacionadas às características químicas do APA e seus mecanismos de reação. A combinação destas informações fornece uma visão teórica e prática da utilização deste oxidante, a qual contribui para a continuidade de pesquisas nesta área, visando benefícios ambientais, econômicos e de saúde pública. Palavras-chave: Ácido peracético. Desinfecção de esgoto sanitário. Características químicas do APA. AbstractThe use of peracetic acid (PAA) to disinfect the wastewater has been researched for diverse authors, mainly in European countries, where the microbiological standards to release the effluents in water bodies are more severe and the moderation to use chlorine, due to the raising of trihalometanos is recommended. In this perspective, this work presents a compilation of researches applied directly to environmental sanitation, as well as the researches related to chemical characteristics of PAA and its reaction mechanisms. The combination of this information gives a theoretical and practical view of the use of this oxidant, which contributes to continue the researches in this area, aiming to benefit the environment, economy and public health system.

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“…Alternatively, more sophisticated models could be applied which would account for changes in both C and N 0 /N over time (Santoro et al 2007). Such data were not available for this study, and it would be advisable to collect them in future work with PFA.…”

Section: -Log Reduction)mentioning

confidence: 99%

“…This is true when using UV radiation, as well as doi: 10.2166/wst.2009.761 oxidizing chemicals such as PAA. PAA is successful only at relatively high doses (2 -5 mg/L, depending on the target; Santoro et al 2007). This renders its economics problematic in many cases.…”

Section: Introductionmentioning

confidence: 99%

Performic acid (PFA): tests on an advanced primary effluent show promising disinfection performance

Gehr

Chen

Moreau

2009

Water Science and Technology

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Performic acid, or PFA (CH(2)O(3)), is a well-known oxidizing agent and disinfectant in the medical field and food industry. It has recently become available on a commercial scale for potential use in wastewater disinfection. This study investigated its application to an advanced primary effluent which is recalcitrant to disinfection by UV and peracetic acid (PAA). Methods were developed for determining PFA concentrations in stock solutions as well as in residual concentrations in the wastewater. Batch and continuous-flow pilot studies showed a correlation between log fecal coliform removals and PFA doses. A PFA dose of approximately 3.4 mg/L and a contact time of 45 minutes could achieve 3-logs removal, and almost total disinfection could be achieved using a dose of 6 mg/L. The by-products of PFA addition are hydrogen peroxide and formic acid (CHOOH), neither of which is considered to be toxic to aquatic fauna at the doses required for disinfection.

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Wastewater Disinfection by Peracetic Acid: Assessment of Models for Tracking Residual Measurements and Inactivation

Cited by 53 publications

References 37 publications

Nondeterministic Computational Fluid Dynamics Modeling of Escherichia coli Inactivation by Peracetic Acid in Municipal Wastewater Contact Tanks

Nondeterministic Computational Fluid Dynamics Modeling of Escherichia coli Inactivation by Peracetic Acid in Municipal Wastewater Contact Tanks

Utilização do ácido peracético na desinfecção de esgoto sanitário: uma revisão

Performic acid (PFA): tests on an advanced primary effluent show promising disinfection performance

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