[Application of the reaction theory to flow pattern on the integrated vertical flow constructed wetland]

This study was conducted to determine the flow pattern of the integrated vertical flow constructed wetland (IVCW) by using the reaction theory. The retention time distribution (RTD), obtained by tracer experiment, showed the retention time was between 19 and 35 h under 200-800 mm/d hydraulic loading rate, and the actual flow pattern was between the ideal plug flow and continuous stirred flow based on the characteristic value of the RTD. Furthermore, the dispersed flow model was found adequate in simulating the actual flow pattern of the IVCW and the Peclect number was determined between 11 and 19. Comparison the planted and unplanted IVCW, the plant root was found favorable for the flow pattern to approximate the ideal plug flow.