Clarification of water movement properties in a multi-soil-layering system

Abstract

In multi-soil-layering (MSL) systems, the effect of the materials and structural differences on the wastewater treatment performance and clogging mechanisms are not fully understood because of insufficient quantitative evaluations of water movement properties inside the system. In the present study, water movement properties were examined using laboratory-scale MSL systems consisting of one to six soil mixture layers (SML). The aims were to determine (1) changes in water movement characteristics inside the systems by varying the hydraulic loading rate (HLR), (2) the relationship between the number of inflow points and water movement characteristics, and (3) water movement characteristics and clogging mechanisms under wastewater treatment conditions.