کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4390707 | 1305189 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system An integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system](/preview/png/4390707.png)
This study was conducted to investigate the efficiency of duckweed (Lemna gibba) in treating a domestic wastewater and to develop an integrated kinetic model for organic and nutrient removal by duckweed-based wastewater treatment (DUBWAT) system. Four pilot-scale DUBWAT units, made of concrete blocks, were operated under ambient conditions (temperatures 30–36 °C), different hydraulic retention times (t), organic loading rates (OLR) and stocking densities (SD). The maximum COD, BOD5, NH3-N, TN and TSS removal efficiencies of 84, 88, 68, 58 and 87%, respectively, were found at optimum operating conditions of t of 10 days, OLR of 50 kgCOD/(ha-d) and SD of 0.5 kg/m2. The nitrogen uptake rate by duckweed was found to be 0.62 g-N/(m2-d). An integrated kinetic model consisting of t, OLR, SD and temperature was developed for the DUBWAT system and validated satisfactorily with data obtained from the literatures.
Journal: Ecological Engineering - Volume 34, Issue 3, 6 October 2008, Pages 243–250