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<p>Clogging is a critical challenge in permeable pavements used for stormwater and wastewater treatment, as it reduces permeability and treatment efficiency. This study evaluates the extended performance of zeolite pervious concrete (ZPC) as a post-treatment step under sustained wastewater loading, focusing on clogging behavior and the effectiveness of pressure washing as a maintenance strategy. Over the course of experiment, significant decreases in both vertical and horizontal flow rates of ZPC were observed due to suspended solids, organic matter, and biofilm growth. After major clogging (approximately 20%), pressure washing was used as a remediation method, resulting in increased permeability and improved contaminant removal efficiency of ZPC. Macro- and microstructural analysis, including Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS), indicated that structural and elemental changes in ZPC after prolong wastewater exposure. Although ZPC's performance was reduced, pressure washing not only effectively recovered the infiltration rate, but also improved the removal efficiency of the system, justifying its viability as a maintenance method. The findings are crucial to understanding the extended efficiency enhancement and clogging management of ZPC systems as passive, sustainable technologies for wastewater post-treatment.</p>

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Clogging of Zeolite Pervious Concrete in Wastewater Applications: Effects on Performance and Recovery by Pressure Washing

  • 期刊论文

  • 发表日期：

    2025年12月27日

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  • Ehsan Teymouri,
  • Kwong Soon Wong,
  • Yee Yong Tan,
  • Nurul Noraziemah Mohd Pauzi

摘要

Clogging is a critical challenge in permeable pavements used for stormwater and wastewater treatment, as it reduces permeability and treatment efficiency. This study evaluates the extended performance of zeolite pervious concrete (ZPC) as a post-treatment step under sustained wastewater loading, focusing on clogging behavior and the effectiveness of pressure washing as a maintenance strategy. Over the course of experiment, significant decreases in both vertical and horizontal flow rates of ZPC were observed due to suspended solids, organic matter, and biofilm growth. After major clogging (approximately 20%), pressure washing was used as a remediation method, resulting in increased permeability and improved contaminant removal efficiency of ZPC. Macro- and microstructural analysis, including Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS), indicated that structural and elemental changes in ZPC after prolong wastewater exposure. Although ZPC's performance was reduced, pressure washing not only effectively recovered the infiltration rate, but also improved the removal efficiency of the system, justifying its viability as a maintenance method. The findings are crucial to understanding the extended efficiency enhancement and clogging management of ZPC systems as passive, sustainable technologies for wastewater post-treatment.