RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2005, Vol. 14 >> Issue (2): 229-232.

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REMOVAL EFFICIENCY OF ALGAE BY DIFFERENT SMALL SYSTEMS OF PLOTS IN CONSTRUCTED WETLAND

WU Zhen-bin, DENG Ping, WU Xiao-hui, CHENG Shui-ping, FU Gui-ping, HE Feng   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-03-20
  • Contact: DENG Ping

Abstract: The removal rates of algae with different layers were compared in different 8 systems of small plot in summer with intermittent hydraulic loading of 800mm/d. The experimental results showed that the algae biomass decreased with water flows in different systems and the removal rate was maximum in effluent water. The constructed wetland was a good new ecological method for treating eutropic lakes water with abundant algae. The removal rate of algae in summer was up to 90%. The main effects on removing of algae were occurred in the frontal layers, and other layers were faintly efficient. Jointed up-flow and down-flow chambers removed algae. Plug-flow bed and pond systems also had roles in removing. In system substrate was dominant in removing algae, different directions of water flow, plant and microbiology had some effects. It will be an important sense to design constructed wetland with high removal efficiency of algae.

Key words: constructed wetland, algae, removal rate

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