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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/22038


    標題: Treatment of Domestic Wastewater by a Combined Constructed Wetland System
    作者: Suwasa Kantawanichkul
    Wasu Iamlaong
    Shuh Ren Jing
    貢獻者: 環境工程與科學系
    關鍵字: combined constructed wetlands
    domestic wastewater
    floating macrophyte
    removal rate
    subsurface vertical flow
    日期: 2008-06
    上傳時間: 2009-11-27 15:53:55 (UTC+8)
    摘要: Laboratory scale combined constructed wetland system composed of a subsurface vertical flow unit connected to a floating macrophyte unit was used to treat domestic wastewater. Hydraulic loading rates (HLR) of 5 arid 8 cm/day were operated to evaluate the efficiencies of the system. Canna(Canna indica Linn.) was planted in a subsurface vertical flow unit and Lettuce (Pistia stratiotes L.) was planted in a floating macrophyte unit. Domestic wastewater from Chiang Mai University campus was fed to each unit with every 7 hours for 1 hour. The removal efficiencies for COD, TKN, NH4-N, SS and TP were dependent on the hydraulic loading rates and the removal efficiency was higher at lower HLR due to longer retention time. Mass removal rate for COD,TKN, NH4tN ,TP and SS were 5.0, 0.38, 0.32, 0.02 and 9.7 g/m2.day, respectively at HLR of 8 cm/d. For HLR of 5 cm/day the mass removal rate for COD,TKN, NH4-N ,TP and SS were 3.7, 0.33, 0.21, 0.015 and 5.3 g/m2.day, respectively.
    Appears in Collections:[環境工程與科學系(所)] 會議論文

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