Aeration intensity simulation in a saturated vertical up-flow constructed wetland

Yasinta John, Guenter Langergraber, Tanveer Adyel, Victor David Jr

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Simulation and performance results of a saturated vertical up-flow constructed wetland (SVU CW) operated under different operational conditions are presented. The SVU CW consists of two different systems planted with Cyperus alternifolius and Iris pseudacorus, and each system consists of three SVU beds operated in series. The SVU CW operates in continuous aeration (CA) mode using different air-water ratios from 0.5:1 to 4:1. The aerated SVU CW achieves a high (more than 85%) removal of chemical oxygen demand (COD), ammonium (NH4+-N), total nitrogen (TN) and total phosphorus (TP). Furthermore, we simulate the SVU CW using the HYDRUS Wetland Module using the CWM1 biokinetic model under CA mode. According to the simulation results, aeration intensity controls the substrate distribution and growth of bacteria with depth in the SVU CW. Organic matter (OM) and nitrogen are removed in the top region (0–30 cm) of the SVU CW. The root mean square error for COD and NH4+-N is >1.5, whereas R2 is >0.99. A good match between observed and simulated data suggests that the CWM1 model is a suitable tool for simulating various processes and bacterial dynamics in aerated SVU CWs.

Original languageEnglish
Article number134793
Number of pages13
JournalScience of the Total Environment
Volume708
DOIs
Publication statusPublished - 15 Mar 2020

Keywords

  • Artificial aeration
  • Constructed wetland
  • CWM1
  • HYDRUS wetland module
  • Saturated vertical up-flow wetland

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