Development of Ecosystem Level Whole Effluent Toxicity Test using Microcosm System

Abstract

In Japan, the introduction of the WET test is considered, but this test may be different from the actual ecosystem because it is a test for a single species. In this study, we developed the WET test using microcosm which is a simulated ecosystem. Both the number of organisms and DO after drainage addition were analyzed by branched-type ANOVA, and the microcosm no observed effect concentration (m-NOEC) and toxicity unit (TU) were calculated. As a result, the TU of experiment building drainage was calculated as 10 and, assessed that it was discharged safely.