BOD (Biochemical Oxygen Demand) is an important parameter when measuring for the quality of water bodies and the efficiency of water treatment plants by determining the degradation of carbons.
Using the official method of BOD5 the concentration of D.O. will be measured in diluted samples before and after incubation. When performing the “BOD self-check measurement” in a closed respirometer the absorption of the carbon leads to a gaugeable pressure change. In both cases the samples have to be incubated for 5 days at 20°C.
Degradation tests
General tests on bio-degradation like soil respiration or bio-degradability of new chemicals can conveniently be carried out using OxiTop
®-IDS systems.
Online determination of BOD
Up-to-date UV-VIS sensors for constant monitoring of WWTP effluents of municipal wastewater have the possibility to measure BOD as well. It is an indirect method using the spectral correlation between COD (chemical oxygen demand) and BOD (adjustment with known BOD values from laboratory measurements) to calculate the current BOD.