TITLE:
Phosphorus and Nitrogen Removal by Saturated Vertical-Flow Constructed Wetlands (SVCWs) Type Micro-Pilot Using Shale from Ivory Coast as a Substrate
AUTHORS:
Dan Eude Kpannieu, Norbert Kouakou Kouadio, N’Dri Séraphin Konan, Coulibaly Nagnonta Hippolyte, Martine Mallet, Lacina Coulibaly, Christian Ruby
KEYWORDS:
Constructed Wetlands, Vertical Flow, Shale, Panicum maximun, Phosphorus Removal, Nitrogen
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.8,
August
18,
2022
ABSTRACT: This study evaluates the performance of shale from Ivory Coast used as
substrate in vertical-flow constructed wetlands in removal of phosphates and nitrogen. The pilot-scale artificial wetland has
been duplicated: filter planted with Panicum
maximun and unplanted. They were set up outdoors, and fed with a municipal
wastewater. The wetlands have been fed with three batches per
week (intermittent) over a period of 3 months. During the operation period, the hydraulic
residence time (HRT) 52 h was used, while wastewater temperatures varied from
about ~33°C. The removal performance of the constructed wetland units was very good, since it reached on
an average 98%, 89.4%, 89.4%, 84%, 80%, 84.8% and 92% for TSS, DOC, BOD5, , TKN, TP and respectively. In addition, the vegetation did not demonstrate superior performance
to unplanted controls. Therefore, this study focuses on the role of shale in the phosphorus and nitrogen
removal from wastewater by constructed wetland.