BOD: Da cinque giorni a cinque ore / BOD analysis: From five days to five hours

An important parameter of those according to the law, with regards to waste waters and representing a required analytical determination according to the national rules on the check of the good working of a depurator is the biological oxygen demand (BOD). The currently applied method is affected by several limitations. It has low accuracy and precision, is strongly depending on the sampling, is time wasting and its application and performance can present different and hard difficulties of execution. However, the result of the analysis cannot be obtained before five days. By taking into account all these complications, an alternative method is here proposed. The proposed procedure is less manipulative, is more precise and is able to furnish the result within about 5 hours from the start of the chemical analysis. The proposed method was applied successfully to sample of a cesspool water depurator and the good results will be shown in the text.