Water treatment residuals (WTR) as potential filter media for pollutants removal in constructed wetland
The objective study was to evaluate the performance of constructed wetland for farmland wastewater treatment using dewatered water treatment residuals (WTR) as the main substrate. This system was operated in a four-stage based tidal flow pattern. Initially, the overall performance of the system was obtained with high removal efficiencies for COD with 89％, BOD with 86％, TN with 79％, SS with 92％, especially PO4 3--P with 96％. Therefore, the performance of individual stages was investigated. The results showed that he first stage of the systems is the leading stage to remove the pollutants of both carbonaceous and PO4 3--P substrates and the remaining stages appeared to play an equal role in the further reduction of pollutants. Finally, changes of molecular weight distribution (MWD) of each stage were discussed by HPSEC analysis, reflecting the higher purification capacity for organic waste in this reed bed. According to these results, it can be concluded that dewatered WTR utilised can be considered as a potential filtration media for pollutants removal in constructed wetlands for wastewater treatment.
constructed wetland water treatment residuals (WTR) farmland wastewater pollutants molecular weight distribution (MWD)
Jianfeng Fu Xiangdong Xue
School of Energy and Environment, Southeast University, Nanjing 210096, P.R.China Environmental Institute, Zhejiang University of Science & Technology, Hangzhou 310012, P.R. China
国际会议
上海
英文
2720-2723
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）