Comparative evaluation of total phosphorus removal performances for treatment of domestic and secondary wastewater using integrated vertical-flow constructed wetlands: two years' experience

文献类型： 外文期刊

第一作者： Chang, Jun-jun

作者： Chang, Jun-jun;Zhang, Sheng-hua;Chang, Jun-jun;Wu, Su-qing;Liang, Wei;Wu, Su-qing;Zhang, Shi-yang;Zhang, Shi-yang

作者机构：

关键词： Phosphorus removal;Integrated vertical-flow constructed wetlands (IVCWs);Domestic wastewater (DW);Secondary wastewater (SW);Plant growth

期刊名称：DESALINATION AND WATER TREATMENT （ 影响因子：1.254； 五年影响因子：1.553 ）

ISSN： 1944-3994

年卷期： 2015 年 56 卷 5 期

页码：

收录情况： SCI

摘要： Four small-scale gravel-based integrated vertical-flow constructed wetlands (IVCWs) were established to treat domestic and secondary wastewater (SW) in parallel under two loading rates (LRs) for an operational period of about two years and the total phosphorus (TP) removal performances were investigated and compared. Highly effective TP elimination sustained for about 10d, with remarkable declines followed to relatively stable efficiencies for both types of wastewater. Significant difference of TP removal performance for the two types of wastewater was observed. In period 1, under high LR, the IVCWs performed better when treating domestic wastewater (DW), achieving average removal efficiency and rate of 51.6% and 0.389gm(-2)d(-1), respectively, compared to those of 30.1% and 0.233gm(-2)d(-1) for SW. However, in the operational period 2 fed with a low LR, better TP removal performance was achieved for SW, with reduction efficiency and rate of 41.5% and 0.057gm(-2)d(-1) on average, while the corresponding value for the treatment of DW was just 12.5% and 0.023gm(-2)d(-1). Significant correlations between TP removal efficiency and plant growth detected during this period and better developed vegetation in systems fed with SW might suggest the considerable role of plant growth, which could be influenced by inlet properties, on P retention and lifespan extending of constructed wetland. Gravel-based IVCW could be employed to remove low load of phosphorus and wastewater properties, and plant growth cycle should be taken intoconsideration in future IVCW design and application.

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