净水技术2012，Vol.31Issue(5)：29-32,62,5.
水化硅酸钙与沸石滤柱去除水中低浓度氮磷
Removal of Low Concentration of Nitrogen and Phosphorus from Water Processes of Filter Columns Adsorption Filled with Hydrated Calcium Silicate and Natural Zeolite
董阳 1雷月华 1李春杰 1刘红美 1孟莎 1张伟 1吉宏坤1
作者信息
摘要
Abstract
Condition of inflowing river, Roshi River with the low concentration of nutrient was simulated. Study took the hydrate calcium silicate and natural zeolite as the adsorbing medium. The experiment designed the different kind of filter columns operated at the same time, filling with hydrated calcium silicate, natural zeolite and mixtures of calcium hydrate and zeolite with ratio 1:3, 1:1 respectively. Through researching the removal effect of the nutrient by 4 different kinds of fdter columns by controlling the material proportion and HRT, it was affirmed that the filter columns with only silicate hydrate had best effect on the removal of phosphate, with average removal efficiency of 90.75 %, but the absorbing ability to ammonia nitrogen was unstable. The filter columns filled with only natural zeolite possess the weaker ability to absorb the phosphate, with average removal rate at 77.30 %, and was also affected by the filter velocity easily. It is concluded when the proportion of material is 1:1 and the filter velocity is 0.696 m/d, the removal effect of the nutrient is promoted definitely. The nutrient concentration of effluent could reach the Level Ⅲ standard of surface water in China. It could be used as the theory base in the project which removing the nutrient in the constructed wetland.关键词
水化硅酸钙/天然沸石/磷酸盐/氨氮/滤柱Key words
hydrated calcium silicate natural zeolite phosphate ammonia nitrogen filter column分类
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董阳,雷月华,李春杰,刘红美,孟莎,张伟,吉宏坤..水化硅酸钙与沸石滤柱去除水中低浓度氮磷[J].净水技术,2012,31(5):29-32,62,5.
