کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4390342 | 1305167 | 2010 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Anoxic treatment wetlands for denitrification Anoxic treatment wetlands for denitrification](/preview/png/4390342.png)
Anoxic subsurface flow (SSF) constructed wetlands were evaluated for denitrification using nitrified wastewater. The treatment wetlands utilized a readily available organic woodchip-media packing to create the anoxic conditions. After 2 years in operation, nitrate removal was found to be best described by first-order kinetics. Removal rate constants at 20 °C (k20) were determined to be 1.41–1.30 d−1, with temperature coefficients (θ) of 1.10 and 1.17, for planted and unplanted experimental woodchip-media SSF wetlands, respectively. First-order removal rate constants decreased as length of operation increased; however, a longer-term study is needed to establish the steady-state values. The hydraulic conductivity in the planted woodchip-media SSF wetlands, 0.13–0.15 m/s, was similar to that measured in an unplanted gravel-media SSF control system.
Journal: Ecological Engineering - Volume 36, Issue 11, November 2010, Pages 1544–1551