Effect of step feeding on the performance of multi-stage vertical flow constructed wetland for municipal wastewater treatment

被引：2
作者：
Shen L. [1 ]
Wu J. [1 ]
Zhong F. [1 ]
Xiang D. [1 ]
Cheng S. [1 ]
机构：
[1] Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai
来源：
Cheng, Shuiping (shpcheng@tongji.edu.cn) | 1600年 / Science Press卷 / 29期
关键词：
Multi-stage vertical flow constructed wetland; Removal of nitrogen and phosphorus; Step feeding;
D O I：
10.18307/2017.0506
中图分类号：
学科分类号：
摘要：
To investigate the effect of step feeding on the performance of multi-stage vertical flow constructed wetland (MS-VFCW) for municipal wastewater treatment, raw wastewater with four step feeding ratios (0%, 10%, 20% and 30%) were dosed to the second stage of the MS-VFCW plots at a total hydraulic load of 100 mm/d. The results showed no significant differences in removal of chemical oxygen demand (COD) and total phosphorus (TP) among the four step feeding ratios, and the highest removal rates of COD and TP reached up to 87.80% and 81.17%, respectively. Most COD was removed in the first stage, with an average contribution of 82.18%. While the most TP was removed in the third stage, with an average contribution of 54.37%. In contrast, the differences in total nitrogen (TN) removal rates among the four step feeding ratios were significant, with the highest TN removal rates (61.70%±4.48%) under the ratio of 20%, in which the average removal contribution of each stage was 36.52%, 42.11% and 21.37%, respectively. The step feeding ratio was recommended as 20% in application of the hybrid VFCWs so as to achieve sound pollutant removal performance. © 2017 by Journal of Lake Sciences.
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页码：1084 / 1090
页数：6
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