Nutrients recovery during sewage treatment by aquatic plants: A comprehensive evaluation
Publication Name
Process Safety and Environmental Protection
Abstract
Aquatic plants have great potentials for simultaneous sewage treatment and nutrients recovery. Herein, six aquatic plants (Alternanthera philoxeroides [A. philoxeroides], Pistia stratiotes, Eichhornia crassipe, Salvinia natans, Ludwigia adscendens and Myriophyllum aquaticum) were comprehensive evaluated through 15 qualitative and quantitative indicators. According to the evaluation system established using the Analytic Hierarchy Process, A. philoxeroides exhibited the best comprehensive performance. Further analyses revealed that A. philoxeroides showed good growth status and sewage treatment performance at different concentrations of nitrogen and phosphorus in municipal sewage (TN:21.6 mg/L-118.0 mg/L; TP:2.2 mg/L-11.1 mg/L). With the optimized initial planting density of 1944.8 g fresh weight/m2, the maximum relative growth rate (RGR) of A. philoxeroides was 0.06 g/(g•d) on the eighth day and the contribution of plant uptake to nitrogen and phosphorus removal were 34.7% and 66.0%, respectively. In this study, A. philoxeroides was proven to be a promising plant for recovering nitrogen and phosphorus from municipal sewage.
Open Access Status
This publication is not available as open access
Volume
185
First Page
143
Last Page
152
Funding Number
2022KTSCX213
Funding Sponsor
King Saud University