학술논문
Tobermolite를 이용한 폐수내 인산염제거
Phosphate Removal in Wastewater by Tobermolite
Phosphate Removal in Wastewater by Tobermolite
Document Type
Article
Author
Source
상하수도학회지 / Journal of the Korean Society of Water and Wastewater. Dec 15, 2013 27(6):751
Subject
Language
Korean
ISSN
1225-7672
Abstract
This study is carried out to get the basic design parameters for phospate removal facilites from wastewater by Tobermolite. The phosphate removal by the apatite formation on the surface was affected by several important factors, tempera¬ture, ions present in wastewater stream, contact time, recirculation rate, and etc. In case of the temperature, with the increase of temperature, the apatite formation was accelerated. When temperature increased from 15 ℃ to 35 ℃, removal efficiency of phosphate increased from 83 % to 93 %. An increase of calcium and fluoride ion content increase the apatite formation, however, bicarbonate and magnesium ion inhibited the crystallization of apatite. As expected, when the recirculation rate was increased from 1 Q to 3 Q, at EBCT (Empty Bed Contact Time) 60min enhanced removal efficiency was observed. The more the recircula¬tion rate increased, the more the removal efficiency increased. According to the results of column experiment using an actual wastewater with low and high phosphate concentration (5 mg/L and 50 mg/L-P), the removal efficiency was 77 % at EBCT of 45 min, and 80 % at 60 min. It was suggested that optimum EBCT was 45 min.