NUMERICAL MODELING OF HORIZONTAL SUBSURFACE FLOW CONSTRUCTED WETLAND SYSTEM

Abstract

This is the first study looking at the wastewater treatment system created at Basrah University, Iraq. This study aims to investigate the effectiveness of horizontal subsurface flow (HSSF) constructed wetland (CW) system for treating municipal wastewater, and to understand the inner processes presented in the wetland to distinguish and define the function of each component of the treatment and to create wastewater treatment built using MATLAB programming language to represent the biochemical phenomena systems similar to the treatment system and implement them throughout Iraq. To do this, a mathematical model based on one dimensional constructed wetland model number 1 (CWM1) matrix and the optimum CWs operational parameters was occurring in the CWs. The CWM1 was used to simulate processes in horizontal subsurface flow (HSSF) constructed wetlands. Results of the simulation had a very good fit to measured NH4-N as well as a good fit to measured chemical oxygen demand (COD) concentration after changing the values of the concentration autotrophic nitrifying bacteria (XA) and acetotrophic methanogenic bacteria (XAMB).

Keywords

• constructed wetland
• wetland treatment
• numerical modeling
• horizontal subsurface flow