Applicability of advanced oxidation processes for the reuse of laundry wastewater

L. Kılıç; N. Dilsizoğlu-Akyol; C. Akarsu; T. Ölmez-Hancı

doi:10.1007/s13762-025-06954-9

Applicability of advanced oxidation processes for the reuse of laundry wastewater

L. Kılıç
, N. Dilsizoğlu-Akyol^*
, C. Akarsu
, T. Ölmez-Hancı

^*Corresponding author for this work

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The integration of advanced oxidation processes (AOPs) for the treatment of laundry wastewater could significantly improve resource efficiency and reduce overall freshwater consumption, thus contributing to sustainable water management strategies. This study therefore demonstrated the effectiveness of different AOPs including O₃, H₂O₂, O₃/H₂O₂, O₃/UV-C, H₂O₂/UV-C, and O₃/H₂O₂/UV-C in the treatment of laundry wastewater to determine the most efficient AOP based on the removal of chemical oxygen demand (COD) and methylene blue active substances (MBAS). The results showed that the O₃/H₂O₂/UV-C method had the highest removal efficiency for both COD (83%) and MBAS (96%). Additionally, a significant reduction in microbial growth was observed in the treated wastewater compared to untreated raw wastewater. Textile tests with the treated wastewater confirmed its potential for reuse in washing machines, as evidenced by achieving a gray scale number of 5, the highest possible without dyeing. These results are further proof of the feasibility of in-situ treatment for the sustainable reuse of laundry wastewater.

Original language	English
Article number	221
Journal	International Journal of Environmental Science and Technology
Volume	23
Issue number	3
DOIs	https://doi.org/10.1007/s13762-025-06954-9
Publication status	Published - Mar 2026

Bibliographical note

Publisher Copyright:
© The Author(s) 2026.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 12 Responsible Consumption and Production
SDG 15 Life on Land

Keywords

Gray test
Hydrogen peroxide
Laundry wastewater
Reuse
Sustainable water management
UV-C photolysis

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10.1007/s13762-025-06954-9

Cite this

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title = "Applicability of advanced oxidation processes for the reuse of laundry wastewater",

abstract = "The integration of advanced oxidation processes (AOPs) for the treatment of laundry wastewater could significantly improve resource efficiency and reduce overall freshwater consumption, thus contributing to sustainable water management strategies. This study therefore demonstrated the effectiveness of different AOPs including O3, H2O2, O3/H2O2, O3/UV-C, H2O2/UV-C, and O3/H2O2/UV-C in the treatment of laundry wastewater to determine the most efficient AOP based on the removal of chemical oxygen demand (COD) and methylene blue active substances (MBAS). The results showed that the O3/H2O2/UV-C method had the highest removal efficiency for both COD (83\%) and MBAS (96\%). Additionally, a significant reduction in microbial growth was observed in the treated wastewater compared to untreated raw wastewater. Textile tests with the treated wastewater confirmed its potential for reuse in washing machines, as evidenced by achieving a gray scale number of 5, the highest possible without dyeing. These results are further proof of the feasibility of in-situ treatment for the sustainable reuse of laundry wastewater.",

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author = "L. Kılı{\c c} and N. Dilsizoğlu-Akyol and C. Akarsu and T. {\"O}lmez-Hancı",

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doi = "10.1007/s13762-025-06954-9",

language = "English",

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AU - Kılıç, L.

AU - Dilsizoğlu-Akyol, N.

AU - Akarsu, C.

AU - Ölmez-Hancı, T.

N1 - Publisher Copyright: © The Author(s) 2026.

PY - 2026/3

Y1 - 2026/3

N2 - The integration of advanced oxidation processes (AOPs) for the treatment of laundry wastewater could significantly improve resource efficiency and reduce overall freshwater consumption, thus contributing to sustainable water management strategies. This study therefore demonstrated the effectiveness of different AOPs including O3, H2O2, O3/H2O2, O3/UV-C, H2O2/UV-C, and O3/H2O2/UV-C in the treatment of laundry wastewater to determine the most efficient AOP based on the removal of chemical oxygen demand (COD) and methylene blue active substances (MBAS). The results showed that the O3/H2O2/UV-C method had the highest removal efficiency for both COD (83%) and MBAS (96%). Additionally, a significant reduction in microbial growth was observed in the treated wastewater compared to untreated raw wastewater. Textile tests with the treated wastewater confirmed its potential for reuse in washing machines, as evidenced by achieving a gray scale number of 5, the highest possible without dyeing. These results are further proof of the feasibility of in-situ treatment for the sustainable reuse of laundry wastewater.

AB - The integration of advanced oxidation processes (AOPs) for the treatment of laundry wastewater could significantly improve resource efficiency and reduce overall freshwater consumption, thus contributing to sustainable water management strategies. This study therefore demonstrated the effectiveness of different AOPs including O3, H2O2, O3/H2O2, O3/UV-C, H2O2/UV-C, and O3/H2O2/UV-C in the treatment of laundry wastewater to determine the most efficient AOP based on the removal of chemical oxygen demand (COD) and methylene blue active substances (MBAS). The results showed that the O3/H2O2/UV-C method had the highest removal efficiency for both COD (83%) and MBAS (96%). Additionally, a significant reduction in microbial growth was observed in the treated wastewater compared to untreated raw wastewater. Textile tests with the treated wastewater confirmed its potential for reuse in washing machines, as evidenced by achieving a gray scale number of 5, the highest possible without dyeing. These results are further proof of the feasibility of in-situ treatment for the sustainable reuse of laundry wastewater.

KW - Gray test

KW - Hydrogen peroxide

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KW - Reuse

KW - Sustainable water management

KW - UV-C photolysis

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ER -

Applicability of advanced oxidation processes for the reuse of laundry wastewater

Abstract

Bibliographical note

UN SDGs

Keywords

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