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

Figure 5

The average 5-day dissolved oxygen (DO₅) and the calculated experimental dilution factor (df), used in the BOD_t experimental analysis, correlated to the observed average BOD₅via linear relationships for various wastewater influents: (a) storm wastewater (STM) where average BOD₅ values were taken from Poland, Luxembourg, and Nigeria storm wastewater treatment plants; (b) industrial wastewater (IND) where average BOD₅ values were taken from GGL, Coca-Cola, and Kumasi Abattoir industrial wastewater treatment plants; (c) domestic wastewater (DOM) where average BOD₅ values were taken from North Sewage, Al-Diwaniyah, and Jordan domestic wastewater treatment plants. Note that the use of step V center connection lines (using ORIGIN software) in demonstrating the df points shows an exact average of df≈9.2 for STM, df≈12 × 10³ for IND, and df≈18.5–28.5 for DOM that should be used as optimal starting trials in the experimental analysis of BOD_t of various wastewaters.

(a)

(b)

(c)