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http://dx.doi.org/10.11001/jksww.2019.33.1.009

Experimental determination of design parameters for filtration trench using phosphorus removal granular materials  

Jang, Yeoju (University of Science and Technology (UST), Smart City & Construction Engineering)
Lim, Hyunman (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Jung, Jinhong (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Ahn, Kwangho (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Chang, Hyangyoun (University of Science and Technology (UST), Smart City & Construction Engineering)
Park, Nari (University of Science and Technology (UST), Smart City & Construction Engineering)
Kim, Weonjae (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Publication Information
Journal of Korean Society of Water and Wastewater / v.33, no.1, 2019 , pp. 9-16 More about this Journal
Abstract
The algal blooms in stagnant streams and lakes have caused many problems. Excessive algae leads to disturbance of ecosystem and overload of water treatment processes. Therefore, phosphorus(P), source of algal blooms, should be controlled. In this study, a filtration trench has been developed to convert dissolved phosphorus into hydroxyapatite(HAP) so that it could be crystallized on the surface of 'phosphorus removal granular material'; and residual particulate phosphorus could be removed by additional precipitation and filtration. The front and rear parts of filtration trench consisted of 'phosphorus removal granular material contact bed' and 'limestone filtration bed', respectively. As a result of the column test using phosphorus removal granular material and limestone serially, $PO_4-P$ was removed more than 90% when EBCT(empty bed contact time) of the contact bed was over 20 minutes; and T-P represented 60% of removal efficiency when total EBCT was over 1.5 hours. The results of column tests to figure out the sedimentation characteristics showed that more than 90% of particulate phosphorus could be removed within 24 hours. It was necessary to optimize the filtration part in order to increase removal efficiency of T-P additionally. Also, it was confirmed through the simulation of Visual MINTEQ that most of particulate phosphorus in the column tests is the form of HAP. Based on the results of the study, it could be suggested that the design parameters are over 0.5 hour of EBCT for phosphorus removal granular material contact bed and over 1.5 hours of EBCT for limestone filtration bed.
Keywords
Phosphorus removal; Filtration trench; Dissolved and particulate phosphorus; Design parameter; Visual MINTEQ;
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Times Cited By KSCI : 5  (Citation Analysis)
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