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ISSN: 2333-9721
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ALLOCATION,CYCLE AND PURGED EFFECTS OF NUTRIENT POLLUTANT N IN ARTIFICIAL WASTEWATER IN SIMULATED KANDELIA CANDEL WETLAND SYSTEM
人工污水中的N在模拟秋茄湿地系统中的分配循环及其净化效果

Keywords: simulated wetland system,Kandelia candel,nutrient pollutant,N,circulation,purification
模拟
,湿地系统,秋茄,净化效应,废水处理

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Abstract:

A simulated mangrove wetland was set up in a greenhouse. The system consisted of three subsystems, the one-year old seedlings of Kandelia candel , sediment and tidal water(the artificial seawater cycled as tide by pumping).The artificial wastewater of three different concentrations,namely Cp1,and Cp10 and artifical seawater(control)of 1.5% salinity had been discharged into the wetland in fixed quantity twice a week for a year.The property of Cp1 was similar to that of domestic wastewater while Cp5 and CP10 contained five and ten times of the nutrients and heavy metals found in nitrogen wastewater,respectively. The results showed that the total nitrogen in artificial wastewater discharged to the system remained mainly in soil with a small portion entered into the seedling subsystem. The cycle time of nitrogen uptaken by seedlings was about 5 years.The N purifying rates of the wetland systems for normal,five times and ten times of concentration of artificial wastewater were 23.50%,78. 06%,and 83. 88%, respectively.

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