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Phosphorus Removal from Municipal Wastewater by Hydrous Ferric Oxide Reactive Filtration and Coupled Chemically Enhanced Secondary Treatment: Part I—Performance
This work examines the performance of a hydrous ferric oxide (HFO) reactive filtration (RF) process with coupled chemically enhanced secondary treatment (RECYCLE) for phosphorus removal from municipal wastewater (HFO‐RF‐RECYCLE). A 3‐month, 0.95‐ML/d (0.25‐mgd) demonstration of HFO‐RF‐RECYCLE was performed at a municipal wastewater treatment plant equipped with oxidation ditches and secondary clarifiers. Influent to the plant averaged 6.0 mg/L phosphorus, with a tertiary effluent average of 0.011 mg/L phosphorus. Iron doses to the plant were low, at 5 mg/L. Inline recycling of HFO solution rejects to the plant influent resulted in a maximum 90.3%, dose‐dependent reduction of phosphorus in the secondary effluent at 4.5 ML/d (1.2 mgd). Other results included reduction of total suspended solids and turbidity. A mass balance analysis was performed. We conclude that HFO‐RF‐RECYCLE may allow very low levels of phosphorus discharge from municipal wastewater treatment plants with a ferric‐iron‐based tertiary filtration process and residual recycling.
Phosphorus Removal from Municipal Wastewater by Hydrous Ferric Oxide Reactive Filtration and Coupled Chemically Enhanced Secondary Treatment: Part I—Performance
This work examines the performance of a hydrous ferric oxide (HFO) reactive filtration (RF) process with coupled chemically enhanced secondary treatment (RECYCLE) for phosphorus removal from municipal wastewater (HFO‐RF‐RECYCLE). A 3‐month, 0.95‐ML/d (0.25‐mgd) demonstration of HFO‐RF‐RECYCLE was performed at a municipal wastewater treatment plant equipped with oxidation ditches and secondary clarifiers. Influent to the plant averaged 6.0 mg/L phosphorus, with a tertiary effluent average of 0.011 mg/L phosphorus. Iron doses to the plant were low, at 5 mg/L. Inline recycling of HFO solution rejects to the plant influent resulted in a maximum 90.3%, dose‐dependent reduction of phosphorus in the secondary effluent at 4.5 ML/d (1.2 mgd). Other results included reduction of total suspended solids and turbidity. A mass balance analysis was performed. We conclude that HFO‐RF‐RECYCLE may allow very low levels of phosphorus discharge from municipal wastewater treatment plants with a ferric‐iron‐based tertiary filtration process and residual recycling.
Phosphorus Removal from Municipal Wastewater by Hydrous Ferric Oxide Reactive Filtration and Coupled Chemically Enhanced Secondary Treatment: Part I—Performance
Newcombe, R. L. (author) / Rule, R. A. (author) / Hart, B. K. (author) / Möller, G. (author)
Water Environment Research ; 80 ; 238-247
2008-03-01
10 pages
Article (Journal)
Electronic Resource
English
sand , iron , filtration , wastewater , hydrous ferric oxide , phosphorus
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