Removal of Phosphorus from Hypolimnetic Lake Water by Reactive Filter Material in a Recirculating System—Laboratory Trial: Fid-Bau Portal

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Removal of Phosphorus from Hypolimnetic Lake Water by Reactive Filter Material in a Recirculating System—Laboratory Trial

Agnieszka Renman / Gunno Renman

A toolbox of methods must be available for the remediation of lakes and water bodies suffering from eutrophication. One method suggested is hypolimnetic withdrawal based on a closed-circuit system. Prior to the start of a pilot-scale test at Lake Hönsan, Sweden, a laboratory trial with containers filled with water and bottom sediment from this lake was performed. A peristaltic pump distributed equal bottom water volume to four columns, two filled with glass beads and two with the filter material Polonite, and then back to the surface of the containers. The reactive filter medium (RFM) removed phosphate (PO₄-P) efficiently (98.6%), despite the relatively low influent concentration (390 µg L⁻¹). The control column filled with glass beads, removed 2.9% of the PO₄-P. The anoxic sediment, containing 2.47 mg P g⁻¹, released PO₄-P, which was indicated by the increased concentration in near-bottom water. The redirected water after RFM filtration had high pH ( $\bar{x} = 11.1)$ ; however, an equalization took place in the water mass to a lower but still increased pH value $(\bar{x} = 8.7)$ compared to the control $(\bar{x} = 7.02)$ . This article reports the pros and cons of a full-scale system using the proposed method.

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Removal of Phosphorus from Hypolimnetic Lake Water by Reactive Filter Material in a Recirculating System—Laboratory Trial

Agnieszka Renman / Gunno Renman

A toolbox of methods must be available for the remediation of lakes and water bodies suffering from eutrophication. One method suggested is hypolimnetic withdrawal based on a closed-circuit system. Prior to the start of a pilot-scale test at Lake Hönsan, Sweden, a laboratory trial with containers filled with water and bottom sediment from this lake was performed. A peristaltic pump distributed equal bottom water volume to four columns, two filled with glass beads and two with the filter material Polonite, and then back to the surface of the containers. The reactive filter medium (RFM) removed phosphate (PO₄-P) efficiently (98.6%), despite the relatively low influent concentration (390 µg L⁻¹). The control column filled with glass beads, removed 2.9% of the PO₄-P. The anoxic sediment, containing 2.47 mg P g⁻¹, released PO₄-P, which was indicated by the increased concentration in near-bottom water. The redirected water after RFM filtration had high pH ( $\bar{x} = 11.1)$ ; however, an equalization took place in the water mass to a lower but still increased pH value $(\bar{x} = 8.7)$ compared to the control $(\bar{x} = 7.02)$ . This article reports the pros and cons of a full-scale system using the proposed method.

Removal of Phosphorus from Hypolimnetic Lake Water by Reactive Filter Material in a Recirculating System—Laboratory Trial

Agnieszka Renman / Gunno Renman

A toolbox of methods must be available for the remediation of lakes and water bodies suffering from eutrophication. One method suggested is hypolimnetic withdrawal based on a closed-circuit system. Prior to the start of a pilot-scale test at Lake Hönsan, Sweden, a laboratory trial with containers filled with water and bottom sediment from this lake was performed. A peristaltic pump distributed equal bottom water volume to four columns, two filled with glass beads and two with the filter material Polonite, and then back to the surface of the containers. The reactive filter medium (RFM) removed phosphate (PO₄-P) efficiently (98.6%), despite the relatively low influent concentration (390 µg L⁻¹). The control column filled with glass beads, removed 2.9% of the PO₄-P. The anoxic sediment, containing 2.47 mg P g⁻¹, released PO₄-P, which was indicated by the increased concentration in near-bottom water. The redirected water after RFM filtration had high pH ( $\bar{x} = 11.1)$ ; however, an equalization took place in the water mass to a lower but still increased pH value $(\bar{x} = 8.7)$ compared to the control $(\bar{x} = 7.02)$ . This article reports the pros and cons of a full-scale system using the proposed method.

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Title:

Removal of Phosphorus from Hypolimnetic Lake Water by Reactive Filter Material in a Recirculating System—Laboratory Trial

Contributors:

Agnieszka Renman (author) / Gunno Renman (author)

Published in:

Water, Vol 14, Iss 5, p 819 (2022)

Publication date:

2022

ISSN:

DOI:

https://doi.org/10.3390/w14050819

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

eutrophication , lake remediation , hypolimnion , phosphorus capture , Hydraulic engineering , TC1-978 , Water supply for domestic and industrial purposes , TD201-500

Metadata by DOAJ is licensed under CC BY-SA 1.0

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