Enhanced performance of pilot-scale hybrid constructed wetlands with A/O reactor in raw domestic sewage treatment
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 110026 |
Journal / Publication | Journal of Environmental Management |
Volume | 258 |
Online published | 7 Jan 2020 |
Publication status | Published - 15 Mar 2020 |
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Abstract
The aim of this study was to improve the nutrient removal efficiency by optimizing aeration time, hydraulic loading rate (HLR) and combination type in hybrid constructed wetlands (HCWs) with anoxic/oxic (A/O) reactor. The results showed that, the highest removal percentages of TN, NH4–N, TP, PO4–P and COD were 87.9%, 98.1%, 86.1%, 85.3% and 95.2%, respectively, in horizontal subsurface flow (HF) – surface flow – vertical subsurface flow CW with A/O reactor at 0.1 m/d HLR and 2 h aeration. HLR, aeration time and combination type had a significant impact on the removal of nutrients, though plant diversity did not have any significant influence. Presence of the A/O reactor improved the removal of TN in the HCWs by reducing influent loading and changing influent characteristics, thereby affecting the role of nitrification, anammox, and denitrification processes. The anammox process was the dominant pathway in the 1st HF CWs during the aeration period, where the highest removal of phosphorus was observed.
Research Area(s)
- A/O reactor, Anammox, Constructed wetland, Functional gene, Nutrient removal, Orthogonal test
Citation Format(s)
Enhanced performance of pilot-scale hybrid constructed wetlands with A/O reactor in raw domestic sewage treatment. / Xiong, Chunhui; Tam, Nora Fungyee; Dai, Yunv et al.
In: Journal of Environmental Management, Vol. 258, 110026, 15.03.2020.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review