Availability of the TOC analysis for BOD management of discharged water from Nagasaki University

Abstract

   The availability of the total organic carbon (TOC) analysis was evaluated by analyzing the biochemical oxygen demand (BOD) and TOC data of discharged water from Nagasaki University. Samples were collected from the connected points of the public sewage line and the pH monitoring tanks. The connected points of the public sewage line are where discharged water from different sources meet. The pH monitoring tanks were installed at the drainage lines of experimental instruments. As a result, the correlations between the TOC and BOD data collected at various sampling points differed. The data of samples collected from the pH monitoring tanks showed good correlations. However, the data of some samples collected from the connected points of the public sewage line did not show good correlations since the samples consisted mainly of sewage water. In this report, it was suggested that the TOC data of discharged water can be used to determine whether the water exceeds the BOD standard.