Influence of loading rate and modes on infiltration of treated wastewater in soil-based constructed wetland

Over the last 10 years soil-based constructed wetlands for discharge of treated wastewater (TWW) are commonly presented as a valuable option to provide tertiary treatment. The uncomplete knowledge in soil modifications and a lack of clear design practices laid the foundation of this work. The aim of...

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Veröffentlicht in:Environmental technology. - 1993. - 38(2017), 1 vom: 02. Jan., Seite 53-64
1. Verfasser: Bisone, Sara (VerfasserIn)
Weitere Verfasser: Gautier, Mathieu, Masson, Matthieu, Forquet, Nicolas
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Constructed wetland phosphate retention swelling clay wastewater infiltration wastewater tertiary treatment Aluminum Silicates Soil Waste Water Water Pollutants, Chemical mehr... Phosphorus 27YLU75U4W Clay T1FAD4SS2M
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520 |a Over the last 10 years soil-based constructed wetlands for discharge of treated wastewater (TWW) are commonly presented as a valuable option to provide tertiary treatment. The uncomplete knowledge in soil modifications and a lack of clear design practices laid the foundation of this work. The aim of this study was to determine optimal hydraulic loads and to observe the main critical parameters affecting treating performances and hydraulic loads acceptance. For this purpose, a soil rich in clay and backfill was chosen to perform column infiltration tests with TWW. Two loading rates and two loading modes were compared to study the influence of an intermittent feeding. Inlet and outlet waters were periodically analysed and columns were instrumented with balances, tensiometers, O2 and temperature probes. Soil physico-chemical characteristics were also taken into account to better understand the modification of the soil. One of the main expectations of tertiary treatment is to improve phosphate removal. A particular attention was thus given to phosphorus retention. The interest of an intermittent feeding in presence of a soil with high clay content was showed. This study highlighted that an intermittent feeding could make possible the use of a clay-rich soil for water infiltration 
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700 1 |a Gautier, Mathieu  |e verfasserin  |4 aut 
700 1 |a Masson, Matthieu  |e verfasserin  |4 aut 
700 1 |a Forquet, Nicolas  |e verfasserin  |4 aut 
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