Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry

Wastewater treatment in the cosmetic industry, which operates in batch mode, is a complex task due to the highly variable composition of the water to be treated. Among other parameters, n-heksan extractable material (HEM) and surfactants must comply with the specified limits. From theory, the advanc...

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Autores principales:	Andreja Nemet, Miloš Bogataj, Zdravko Kravanja
Formato:	article
Lenguaje:	EN
Publicado:	AIDIC Servizi S.r.l. 2021
Materias:	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/4a21c1304d3f48ffa822082295e9b387
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spelling	oai:doaj.org-article:4a21c1304d3f48ffa822082295e9b3872021-11-15T21:47:50ZOptimization of the Sequence of Wastewater Treatment in the Cosmetic Industry10.3303/CET21881192283-9216https://doaj.org/article/4a21c1304d3f48ffa822082295e9b3872021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/11912https://doaj.org/toc/2283-9216Wastewater treatment in the cosmetic industry, which operates in batch mode, is a complex task due to the highly variable composition of the water to be treated. Among other parameters, n-heksan extractable material (HEM) and surfactants must comply with the specified limits. From theory, the advanced oxidation process (AOP) with a Fenton-like process is more suitable for surfactant degradation, while the coagulation/flocculation process (CFP) is more efficient for HEM removal. Determining the appropriate sequence of AOP treatment and CFP affects the quality of released water, the efficiency of each process step, and the consumption of required chemicals. The objective of this research was to optimize the treatment sequence, the time required for each treatment, and the amount of sludge from wastewater treatment. For this purpose, AOP treatment and CFP laboratory tests were performed for different groups of samples and samples with high HEM and/or surfactant content. Based on the efficiency of the laboratory tests and the assessed wastewater composition (from mass and concentration balances), an optimization model was developed. The optimization model enables optimization of the wastewater treatment plant (WWTP) by feeding each of the streams to either i) AOP treatment, ii) CFP treatment, iii) AOP treatment followed by CFP treatment, iv) CFP pretreatment followed by AOP and CFP, v) bypass (i.e. the wastewater stream is not treated but mixed with treated streams). The optimal solution can be determined by minimizing the total annual cost of treatment or/and maximizing removal of pollutants. An additional analysis was performed considering the dilution of wastewater with freshwater after the treatment process. The results show that this last proposal is more economical but leads to questionable environmental impacts.Andreja NemetMiloš BogatajZdravko KravanjaAIDIC Servizi S.r.l.articleChemical engineeringTP155-156Computer engineering. Computer hardwareTK7885-7895ENChemical Engineering Transactions, Vol 88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
spellingShingle	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895 Andreja Nemet Miloš Bogataj Zdravko Kravanja Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry
description	Wastewater treatment in the cosmetic industry, which operates in batch mode, is a complex task due to the highly variable composition of the water to be treated. Among other parameters, n-heksan extractable material (HEM) and surfactants must comply with the specified limits. From theory, the advanced oxidation process (AOP) with a Fenton-like process is more suitable for surfactant degradation, while the coagulation/flocculation process (CFP) is more efficient for HEM removal. Determining the appropriate sequence of AOP treatment and CFP affects the quality of released water, the efficiency of each process step, and the consumption of required chemicals. The objective of this research was to optimize the treatment sequence, the time required for each treatment, and the amount of sludge from wastewater treatment. For this purpose, AOP treatment and CFP laboratory tests were performed for different groups of samples and samples with high HEM and/or surfactant content. Based on the efficiency of the laboratory tests and the assessed wastewater composition (from mass and concentration balances), an optimization model was developed. The optimization model enables optimization of the wastewater treatment plant (WWTP) by feeding each of the streams to either i) AOP treatment, ii) CFP treatment, iii) AOP treatment followed by CFP treatment, iv) CFP pretreatment followed by AOP and CFP, v) bypass (i.e. the wastewater stream is not treated but mixed with treated streams). The optimal solution can be determined by minimizing the total annual cost of treatment or/and maximizing removal of pollutants. An additional analysis was performed considering the dilution of wastewater with freshwater after the treatment process. The results show that this last proposal is more economical but leads to questionable environmental impacts.
format	article
author	Andreja Nemet Miloš Bogataj Zdravko Kravanja
author_facet	Andreja Nemet Miloš Bogataj Zdravko Kravanja
author_sort	Andreja Nemet
title	Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry
title_short	Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry
title_full	Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry
title_fullStr	Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry
title_full_unstemmed	Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry
title_sort	optimization of the sequence of wastewater treatment in the cosmetic industry
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/4a21c1304d3f48ffa822082295e9b387
work_keys_str_mv	AT andrejanemet optimizationofthesequenceofwastewatertreatmentinthecosmeticindustry AT milosbogataj optimizationofthesequenceofwastewatertreatmentinthecosmeticindustry AT zdravkokravanja optimizationofthesequenceofwastewatertreatmentinthecosmeticindustry
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Optimization of the Sequence of Wastewater Treatment in the Cosmetic Industry

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