Predicting Optimum Dilution Factors for BOD Sampling and Desired Dissolved Oxygen for Controlling Organic Contamination in Various Wastewaters

Figure 6

Dilution factor (df) correlated to average BOD₅/COD ratios and the estimated average values for the different studied wastewater effluents as influents to various wastewater treatment plants: (a) the average BOD₅/COD ratio ranges found from critical analysis and carried out BOD-related calculations for the three wastewater types, with the obtained df possible ranges to be used as trials in the experimental steps (IND, ×10³); (b) a comparison between different wastewater characteristics in terms of their calculated average BOD₅ corresponding to the wastewater average COD, note that reported average df values here are suggested to be the initial trials used for BODt experimental analysis; and (c) determined average BOD₅/COD ratios from the various studied wastewater treatment plants.

(a)

(b)

(c)