Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Ding, Y., Lyu, T. ORCID: 0000-0001-5162-8103, Baines, S., Li, Z., Ding, H., You, S. and Xie, Q., 2017. Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation. Environmental Science and Pollution Research. ISSN 0944-1344

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Abstract

This study investigates the influence of multilayer substrate configuration in horizontal subsurface flow constructed wetlands (HSCWs) on their treatment performance, biofilm development, and solid accumulation. Three pilot-scale HSCWs were built to treat campus sewage and have been operationalfor three years. The HSCWs included mono-layer (CW1), three-layer (CW3), and six-layer (CW6) substrate configurations with hydraulic conductivity of the substrate increasing from the surface to bottom in the multilayer CWs. It was demonstrated the pollutants removal performance after 3-year operation improved in the multilayer HSCWs (49-80%) compared to the mono layer HSCW (29-41%). Simultaneously, the multilayer HSCWs exhibited significant features that prevented clogging compared to the monolayer configuration. The amount of accumulated solids was notably higher in the monolayer CW compared to multilayer CWs. Further, multilayer HSCWs could delay clogging by providing higher biofilm development for organics removal and consequently, lesser solid accumulations. Principal component analysis strongly supported the visualization of the performance patterns in the present study and showed that multilayer substrate configuration, season, and sampling locations significantly influenced biofilm growth and solid accumulation. Finally, the present study provided important information to support the improved multilayer configured HSCW implication in the future.

Item Type: Journal article
Publication Title: Environmental Science and Pollution Research
Creators: Ding, Y., Lyu, T., Baines, S., Li, Z., Ding, H., You, S. and Xie, Q.
Publisher: Springer
Date: 4 November 2017
ISSN: 0944-1344
Identifiers:
NumberType
10.1007/s11356-017-0636-4DOI
636Publisher Item Identifier
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: Linda Sullivan
Date Added: 09 Nov 2017 11:48
Last Modified: 09 Nov 2017 11:48
URI: http://irep.ntu.ac.uk/id/eprint/32007

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