Implications of COD analysis use in the peracetic acid-based wastewater treatment

Peracetic acid (PAA) stands out as a safe and environmental-friendly oxidant and disinfectant which has been effectively used in wastewater treatment. Chemical oxygen demand (COD) is a very popular analysis in wastewater treatment; however, the interference of residual PAA on the COD measurement is...

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Autores principales:	Luan de Souza Leite, Mariana Daniel Tango, José Antônio Zanetoni Filho, Maria Teresa Hoffmann, Luiz Antonio Daniel
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	chemical oxygen demand hydrogen peroxide oxidant sodium metabisulfite Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/e80b1424e93043c8a702d64299d41fb1
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spelling	oai:doaj.org-article:e80b1424e93043c8a702d64299d41fb12021-11-06T11:20:27ZImplications of COD analysis use in the peracetic acid-based wastewater treatment0273-12231996-973210.2166/wst.2021.300https://doaj.org/article/e80b1424e93043c8a702d64299d41fb12021-09-01T00:00:00Zhttp://wst.iwaponline.com/content/84/5/1270https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Peracetic acid (PAA) stands out as a safe and environmental-friendly oxidant and disinfectant which has been effectively used in wastewater treatment. Chemical oxygen demand (COD) is a very popular analysis in wastewater treatment; however, the interference of residual PAA on the COD measurement is still unknown. In this context, this study investigated the implications of applying the COD analysis in PAA-based treatment. Each 1 mg·L−1 of PAA increased the COD concentration around 13.5 mg O2·L−1. Residual PAA and hydrogen peroxide (H2O2) were efficiently neutralized by sodium metabisulfite (SMBS) at the optimal SMBS/PAA ratio of 10.2:1 in a wide pH range (5 to 9). The effect of PAA addition on the COD concentration was evaluated in different water matrices (potassium hydrogen phthalate and wastewater solutions). The COD results with the SMBS addition at optimal SMBS/PAA ratio were lower than the ones without it. It may happen due to the neutralization of residual H2O2/PAA and the complexity of the water matrices which can interfere in the COD results. This study discussed the impact of the residual H2O2/PAA neutralization before the COD analysis, and this investigation can be used as a practical guideline for the correct COD measurement in PAA-based treatment. HIGHLIGHTS Influence of peracetic acid (PAA) in COD test was analyzed.; Sodium metabisulfite (SMBS) was efficient in quenching the PAA.; Total neutralization by SMBS allowed a correct COD measurement.;Luan de Souza LeiteMariana Daniel TangoJosé Antônio Zanetoni FilhoMaria Teresa HoffmannLuiz Antonio DanielIWA Publishingarticlechemical oxygen demandhydrogen peroxideoxidantsodium metabisulfiteEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 5, Pp 1270-1279 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	chemical oxygen demand hydrogen peroxide oxidant sodium metabisulfite Environmental technology. Sanitary engineering TD1-1066
spellingShingle	chemical oxygen demand hydrogen peroxide oxidant sodium metabisulfite Environmental technology. Sanitary engineering TD1-1066 Luan de Souza Leite Mariana Daniel Tango José Antônio Zanetoni Filho Maria Teresa Hoffmann Luiz Antonio Daniel Implications of COD analysis use in the peracetic acid-based wastewater treatment
description	Peracetic acid (PAA) stands out as a safe and environmental-friendly oxidant and disinfectant which has been effectively used in wastewater treatment. Chemical oxygen demand (COD) is a very popular analysis in wastewater treatment; however, the interference of residual PAA on the COD measurement is still unknown. In this context, this study investigated the implications of applying the COD analysis in PAA-based treatment. Each 1 mg·L−1 of PAA increased the COD concentration around 13.5 mg O2·L−1. Residual PAA and hydrogen peroxide (H2O2) were efficiently neutralized by sodium metabisulfite (SMBS) at the optimal SMBS/PAA ratio of 10.2:1 in a wide pH range (5 to 9). The effect of PAA addition on the COD concentration was evaluated in different water matrices (potassium hydrogen phthalate and wastewater solutions). The COD results with the SMBS addition at optimal SMBS/PAA ratio were lower than the ones without it. It may happen due to the neutralization of residual H2O2/PAA and the complexity of the water matrices which can interfere in the COD results. This study discussed the impact of the residual H2O2/PAA neutralization before the COD analysis, and this investigation can be used as a practical guideline for the correct COD measurement in PAA-based treatment. HIGHLIGHTS Influence of peracetic acid (PAA) in COD test was analyzed.; Sodium metabisulfite (SMBS) was efficient in quenching the PAA.; Total neutralization by SMBS allowed a correct COD measurement.;
format	article
author	Luan de Souza Leite Mariana Daniel Tango José Antônio Zanetoni Filho Maria Teresa Hoffmann Luiz Antonio Daniel
author_facet	Luan de Souza Leite Mariana Daniel Tango José Antônio Zanetoni Filho Maria Teresa Hoffmann Luiz Antonio Daniel
author_sort	Luan de Souza Leite
title	Implications of COD analysis use in the peracetic acid-based wastewater treatment
title_short	Implications of COD analysis use in the peracetic acid-based wastewater treatment
title_full	Implications of COD analysis use in the peracetic acid-based wastewater treatment
title_fullStr	Implications of COD analysis use in the peracetic acid-based wastewater treatment
title_full_unstemmed	Implications of COD analysis use in the peracetic acid-based wastewater treatment
title_sort	implications of cod analysis use in the peracetic acid-based wastewater treatment
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/e80b1424e93043c8a702d64299d41fb1
work_keys_str_mv	AT luandesouzaleite implicationsofcodanalysisuseintheperaceticacidbasedwastewatertreatment AT marianadanieltango implicationsofcodanalysisuseintheperaceticacidbasedwastewatertreatment AT joseantoniozanetonifilho implicationsofcodanalysisuseintheperaceticacidbasedwastewatertreatment AT mariateresahoffmann implicationsofcodanalysisuseintheperaceticacidbasedwastewatertreatment AT luizantoniodaniel implicationsofcodanalysisuseintheperaceticacidbasedwastewatertreatment
_version_	1718443766722854912

Implications of COD analysis use in the peracetic acid-based wastewater treatment

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