Research on the Impact of Precipitates Produced with Fe²⁺ as a Coagulant Plays on Water Quality

Abstract:

Fe²⁺ is widely used as a coagulant to enhance the primary SBR sewage treatment process. Based on SBR system, this paper studies the change trend of phosphate content in various stages by simulating the interaction between sewage and the precipitates produced with Fe²⁺ in the sediment as a coagulant. The results indicate that excluding the impact of activated sludge, the concentration of PO₄³⁺ increases in the end of the anaerobic stage with the increase of FePO₄ cumulant in the sediment and there is an equimultiple relationship between the increase of the concentration of PO₄³⁺ in the effluent and the FePO₄ dosage and that the accumulation of Fe (OH)₃ can contribute to the subsequent sustainable phosphorus removal, but the cumulant increase of Fe (OH)₃ has no significant influence on the effects of phosphorus removal.

• Periodical: Applied Mechanics and Materials (Volumes 687-691)
• Pages: 4339-4342
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.687-691.4339
• Online since: November 2014
• Authors: Ying Zhang*, Lei Zhu, Jie Fan
• Keywords: Chemical Phosphorus Removal, Domestic Sewage, Ferrous Sulfate, SBR

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