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DOI : 10.17640/KSWST.2015.23.3.35 ,    Vol.23, No.3, 35 ~ 45, 2015
Title
A Study on Treatment of Phosphorus Species using Iron Coagulation with Hydrogen Peroxide and Persulfate
박성환 Sung Hwan Park , 문성용 Sung Yong Moon , 문병현 Byung Hyun Moon
Abstract
Effects of H2O2 and persulfate oxidation on iron coagulation for treatment of phosphorus species, such as orthophosphate, metaphosphate, pyrophosphate, organic phosphate, were investigated. The effects of coagulant dosage, hydrogen peroxide dosage, the combined sequence ferric coagulation and H2O2 addition, for fenton oxidation and coagulation were studied. Also ferric coagulation and persulfate addition were Examined. The characteristics of floc growth rate were monitored using the PDA. The removal efficiencies of phosphorus species by iron coagulation were increased as Fe/P molar ratio increased. However, the residual concentration of metaphosphate, pyrophosphate, organic phosphate by a ferric coagulation were not decreased as Fe/P molar ratio increased. But the residual concentration of metaphosphate, pyrophosphate, organic phosphate were decreased both iron coagulation and H2O2 addition and iron coagulation and persulfate addition. The result indicated that non-reactive phosphorus after iron coagulation was changed to reactive phosphorus by H2O2 addition for fenton oxidation or persulfate addition and the oxidized iron enhanced the coagulation efficiencies.
Key Words
Phosphorus species, Phosphorus removal, Ferric coagulation, Hydrogen peroxide, Persulfate, Floc size
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