Phosphorus Removal from Municipal Wastewater by Hydrous Ferric Oxide Reactive Filtration and Coupled Chemically Enhanced Secondary Treatment: Part II-Mechanism

Autor:	R L, Newcombe, D G, Strawn, T M, Grant, S E, Childers, G, Möller
Rok vydání:	2008
Předmět:	Iron Ecological Modeling Phosphorus Ferric Compounds Waste Disposal Fluid Pollution Water Purification Biodegradation Environmental Bioreactors Humans Environmental Chemistry Adsorption Cities Waste Management and Disposal Filtration Water Science and Technology
Zdroj:	Water Environment Research. 80:248-256
ISSN:	1061-4303
DOI:	10.2175/106143007x220987
Popis:	The removal mechanism 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) was examined. A 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 3-month tertiary effluent average of 0.011 mg/L phosphorus. In addition to aqueous geochemical modeling, experiments with surface charge, scanning electron microscopy, adsorptive capacity, thermal desorption, and most probable number of iron(III)-reducing bacteria were performed on samples from the system, to determine the major phosphorus-removal pathways. Results suggest that, in addition to filtration of particulate phosphorus, the low tertiary effluent total phosphorus result was achieved by adsorption.
Databáze:	OpenAIRE
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