title: Treatment of combined sewer overflows using ferrate (VI).
abstract: This paper presents the results of a study conducted on the treatment of combined sewer overflows using ferrate (VI) [Fe (VI)]. At a Fe (VI) dose of 0.24 mg/L, total chemical oxygen demand (TCOD), soluble chemical oxygen demand (SCOD), total biochemical oxygen demand (TBOD5), soluble biochemical oxygen demand (SBOD5), total suspended solids (TSS), volatile suspended solids (VSS), total phosphorus (TP), total nitrogen (TN), and soluble TN removal efficiencies of 71, 75, 69, 68, 72, 83, 64, 38, and 36%, respectively, were achieved. Kinetic studies revealed that a contact time of only 15 minutes is sufficient to achieve secondary effluent criteria. An innovative technique of using primary sludge (PS) and thickened waste activated sludge as a source for the in situ synthesis of ferrate was developed. A comparative study of treatment efficiencies achieved by Fe (VI) generated from different sources was done. At 0.1 mg/L dose of Fe (VI) synthesized from PS, TCOD, SCOD, TSS, VSS, TP, and TN removal efficiencies of 60, 62, 63, 67, 30, and 25%, respectively, were achieved.
authors.forename: Rohan
authors.initials: R
authors.lastname: Gandhi
authors.forename: Ajay K
authors.initials: AK
authors.lastname: Ray
authors.forename: Virender K
authors.initials: VK
authors.lastname: Sharma
authors.forename: George
authors.initials: G
authors.lastname: Nakhla
mesh_terms: D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D012498:Sanitary Engineering; D012722:Sewage / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000737:chemistry*
chemical_list: D012722:Sewage; D014873:Water Pollutants; C017311:ferrate ion; D007501:Iron