Development and verification of measurement techniques relating to operational data collection for the fractionation of the chemical oxygen demand in sewage treatment plant inflows

The dimensioning of single-stage municipal sewage treatment plants is often carried out, also internationally, according to the worksheet ATV-A 131 (2000) of the German Association for Water, Wastewater and Waste. In its new edition in 2016, the fractionation of the chemical oxygen demand (COD) replaced the biochemical oxygen demand (BOD) as a guide parameter. More operating data concerning these COD fractions is required in order to be able to further optimise operational plants in the future. In collaboration with the Ruhr University, Bochum, measuring techniques are currently being determined for the various COD fractions and subsequently tested on large-scale facilities, including ones located in warm climates.