Geothermal effects for bod removal in horizontal subsurface flow constructed Wetlands: A numerical approach

Abstract

A simplified numerical approach is presented for the simultaneous groundwater flow, geothermal energy (heat) transport and contaminant transport and removal in shallow unconfined aquifers. Emphasis is given to Biochemical Oxygen Demand (BOD) removal in Horizontal Subsurface Flow Constructed Wetlands (HSF CW), under non-isothermal conditions. The system of the governing non-linear partial differential equations is treated numerically by using the family computer code Visual MODFLOW. In a numerical example, where BOD is injected in entering geothermal water, the so-resulted computational results are compared with available experimental data.