BOD Determination Of Strongly-Loaded Organic Waste Water With The BOD-OxiDirect

Strongly loaded organic industrial waste water, i.e. from sugar- or paper-factories, need to be pre-treated before determining the BOD value. Because of the very high content of organic material in the sample, there is a disparity between the nutrients ratio (C:N:P). The lack of nitrogen (N) and phosphorus (P) causes a strong decrease in microbial capability and abundance, what lead to a subestimate of the BOD as a consequence. In the following the pretreatment of a sample with so called dilutionwater is described, which contains the missing nutrients and microorganisms and with which an adequate BOD measurement will be obtained.