作 者：Chen, N.W., Li, J., Wu, Y.G., Kangas, P.C.,Huang, B.Q., Yu, C.C., and Chen, Z.H. 影响因子：2.787
刊物名称：Ecological Engineering
出版年份：2015
卷：84 页码：506-514
An experimental algal floway (5 m2in area) for water quality management was studied seasonally over an annual cycle in 2013 at a drinking water reservoir in Fujian Province, China. Algal productivity averaged 21.4±8.5 g dry weight m−2d−1across all seasons. Dominant algal taxa were Baciliariophyta (mainlyMelosirasp.). Ash content of the algal biomass was high (82.4–91.4%) perhaps in part due to high concentrations of diatom silica frustules. Nutrient (N and P) removal was assessed by multiplying algal biomassproductivity rate by the nutrient content of the algal biomass. Average nutrient removal rates across seasons were 212±28 mg N m−2d−1and 36±6 mg P m−2d−1. No seasonal difference was found for either algal productivity or N removal rates but P removal rates were significantly higher in the spring and summer compared with fall and winter. N and P removal rates were positively correlated with algal productivity. Algal floway performance, in terms of algal productivity and nutrient removal rates from this study, for this subtropical site, was higher than most published studies, which were largely from temperate zone locations in the United States. Based on this study, scaling calculations suggest that thearea of algal floway required to treat 1 m3d−1of water in the fall and winter would be more than twicethe size (≥22 m2) than in the spring and summer (≤11 m2).
Fig.8.Relationships between nutrient removal rates and algal productivity, nutrients content in biomass among different cycles.
