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Performance evaluation of wastewater treatment using horizontal subsurface flow constructed wetlands optimized by micro-aeration and substrate selection.
- Source :
- Water Science & Technology; 2015, Vol. 71 Issue 9, p1317-1324, 8p
- Publication Year :
- 2015
-
Abstract
- The effects of micro-aeration and substrate selection on domestic sewage treatment performance were explored using three pairs (with or without micro-aeration) of horizontal subsurface flow (HSSF) constructed wetlands (CWs) filled with zeolite, ceramsite or quartz granules. The individual and combined effects of micro-aeration and substrate selection on the purification performance of the experimental-scale HSSF CWs were evaluated. The results showed that micro-aeration significantly increased the treatment efficiencies for chemical oxygen demand, total nitrogen, total phosphorus (TP), ortho-phosphate (PO<superscript>3-</superscript><subscript>4</subscript>-P) and ammonium nitrogen (NH<superscript>+</superscript><subscript>4</subscript>-N) using HSSF CWs, while the substrate selection significantly affected the TP, PO<superscript>3-</superscript><subscript>4</subscript>-P and NH<superscript>+</superscript><subscript>4</subscript>-N removal efficiencies (p <0.05). A two-way analysis of variance (ANOVA) indicated that there was a significant interaction term (i.e. micro-aeration x substrate selection) for NH<superscript>+</superscript><subscript>4</subscript>-N removal (p <0.05). Among the three substrates, ceramsite was the best substrate for the treatment of domestic sewage using HSSF CWs. Therefore, the results of this study suggest that a ceramsite-filled HSSF CW with micro-aeration could be the optimal configuration for decentralized domestic sewage treatment. [ABSTRACT FROM AUTHOR]
- Subjects :
- WASTEWATER treatment
SEWAGE aeration
WETLANDS
NITRIFICATION
ANALYSIS of variance
Subjects
Details
- Language :
- English
- ISSN :
- 02731223
- Volume :
- 71
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Water Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 102541711
- Full Text :
- https://doi.org/10.2166/wst.2015.090