Abstract: Using the Phragmites australis as a carbon source,the static carbon releasing law of Phragmites australis having been subject to three kinds of pretreatment methods,including simple treatment,alkali soaking treatment and alkali heat treatment,and its accelerating effect on denitrification have been analyzed. On this basis,the accelerating effect of Phragmites australis on the purification of micro-pollution in constructed wetland has been investigated. The results show that the alkali pretreated Phragmites australis has persistent carbon releasing capability,and can further enhance the denitrification capability of the system persistently. The addition of alkali heat treated Phragmites australis to the horizontal flow constructed wetland,under the precondition of increasing the system effluent COD indistinctively can increase the denitrification and dephosphorization capabilities of the constructed wetland distinctively. Theaverage removing rates of TN and TP are 39.36% and 16.10%,respectively.

Key words: constructed wetland, denitrification, plant carbon source, Phragmites australis

摘要： 选用芦苇为碳源，分析了经过简单处理、碱泡处理、碱热处理3种预处理方式后芦苇的静态释碳规律及其对反硝化的促进作用，在此基础上研究了碱热处理芦苇对人工湿地净化微污染水的促进作用。结果表明，碱预处理后的芦苇具有持续释放碳源的能力，进而能够持续强化系统的反硝化能力。在人工湿地系统中添加碱热处理的芦苇在不显著提高系统出水COD的前提下，显著提高了人工湿地的脱氮除磷能力，TN、TP平均去除率分别提高了39.36%、16.10%。

关键词: 人工湿地, 反硝化, 植物碳源, 芦苇

CLC Number: 

• X703.1