The Performance of Species Mixtures in Nitrogen and Phosphorus Removal at Different Hydraulic Retention Times

摘要

The effects of species compositions (two-species mixtures or monocultures) and hydraulic retention times (HRT; 1,4, 8, 16,24,48 hours) on total nitrogen (TN) and total phosphorus (TP) removal from eutroph-ic water were studied in a constructed wetland. Two species mixtures showed higher efficiency to remove TN and TP than monocultures. Average removal efficiency of TN and TP was 49.6% and 34.0%, respectively. A longer HRT enhanced the removal efficiency of TN and TP, which suggested that species mixtures, HRT, and species mixtures × HRT interaction were useful for increasing the wastewater TN and TP removal.