%0 Journal Article
%A TANG Xian-qiang
%A WU Min
%T Removal of Nitrogen and Phosphorus in Domestic Wastewater by Solar Aerated Vertical Subsurface Flow Constructed Wetlands
%D 2015
%R 10.3969/j.issn.1001-5485.2015.06.007
%J Journal of Yangtze River Scientific Research Institute
%P 37-41
%V 32
%N 6
%X Reeds <i>(Phragmites)</i> and gravel were used to develop pilot scale solar aerated vertical subsurface flow constructed wetlands to treat domestic wastewater. The hydraulic loading rate was set 400 mm/d and air to water ratio was 10∶1. Experimental results indicated that solar aeration resulted in 24.8%, 9.4%, 15.7% and 11.5% increment in total mean removal respectively for ammonia-nitrogen(NH<sub>4</sub>-N), total nitrogen (TN), soluble reactive phosphorus (SRP) and total phosphorus(TP) with corresponding influent concentrations of 5.14 mg/L, 7.56 mg/L, 0.40 mg/L and 0.53 mg/L. Low atmospheric temperature and influent concentration, however, caused a negligible role of solar aeration in nitrogen and phosphorus removal. For the present experiment apparatus, the expenditure of solar aerated wetland is 2.85 times the non-aerated wetlands. Considering a total investment over a period of 20 years, the cost to treat domestic wastewater for solar aerated wetland is only 0.02 RMB/m<sup>3</sup> higher than that of non-aerated wetland. In conclusion, solar aerated constructed wetland is a promising solution of treating domestic wastewater with competitive technical and economical advantages.
%U http://ckyyb.crsri.cn/EN/10.3969/j.issn.1001-5485.2015.06.007