Title: The significant variables of effluent constructed wetlands treated domestic wastewater by a subset regression model

Authors: Amjad Hussein; Ali Sadig Mohommed Bager

Addresses: Department of Civil Engineering, College of Engineering, Al-Muthanna University, Al-Muthanna, Samawah, Iraq; School of Computing, Science, and Engineering, University of Salford, Newton Building, Peel Park Campus, Greater Manchester, M5 4WT, Salford, UK ' College of Nursing, Al-Muthanna University, Al-Muthanna, Samawah, Iraq

Abstract: Domestic wastewater with/without petroleum was treated by vertical flow constructed wetlands under different set-up designs and operation conditions. These conditions include different aggregate diameters, contact time, resting time, and chemical oxygen demand. The physical and chemical measurements of effluents were obtained. These measurements are total petroleum hydrocarbons, chemical oxygen demand, biochemical oxygen demand, ammonia-nitrogen, nitrate-nitrogen, ortho-phosphate-phosphorous, suspended solids, turbidity and pH. This research aims to find out which measures are significantly effective by using the subset selected regression model. The results showed that chemical oxygen demand, biochemical oxygen demand, ammonia-nitrogen have significantly effective (P < 0.05), and they have a direct effect on selection, which filter is the best choice.

Keywords: environment; wastewater; constructed wetlands; subset regression; chemical oxygen demand; COD.

DOI: 10.1504/IJEWM.2023.133592

International Journal of Environment and Waste Management, 2023 Vol.32 No.3, pp.344 - 354

Received: 10 Oct 2020
Accepted: 07 Mar 2021

Published online: 25 Sep 2023 *

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