郑于聪 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

Journal of Environmental Sciences

Key Words:

中文关键字：人工湿地；表流；潜流；纳污河流；处理，英文关键字：constructed wetland；surface-flow；subsurface-flow；p

Abstract:

A series of large pilot constructed wetland (CW) systems were constructed near the confluence of an urban stream to a larger river in Xi’an, a northwestern megacity in China, for treating polluted stream water before it entered the receiving water body. Each CW system is a combination of surfaceand subsurface-flow cells with local gravel, sand or slag as substrates and Phragmites australis and Typha orientalis as plants. During a one-year operation with an average surface loading of 0.053 m3/(m2
day), the overall COD, BOD, NH3-N, total nitrogen (TN) and total phosphorus (TP) removals were 72.7%  4.5%, 93.4%  2.1%, 54.0%  6.3%, 53.9%  6.0% and 69.4%  4.6%, respectively, which brought about an effective improvement of the river water quality. Surface-flow cells showed better NH3-N removal than their TN removal while subsurface-flow cells showed better TN removal than their NH3-N removal. Using local slag as the substrate, the organic and phosphorus removal could be much improved. Seasonal variation was also found in the removal of all the pollutants and autumn seemed to be the best season for pollutant removal due to the moderate water temperature and well grown plants in the CWs.

Note:

王晓昌

Co-author:

赵亚乾

First Author:

liuyongjun,xiongjiaqing,王晓昌,zhengyucong

Indexed by:

Journal paper

Volume:

卷：

Issue:

期：26

Page Number:

页：749-756

Translation or Not:

no

Date of Publication:

2014-12-01