What is generated from each pound of BOD applied to the aeration basin in the activated sludge process?

In the activated sludge process, biochemical oxygen demand (BOD) is a measure of the amount of organic matter present in wastewater. When BOD is introduced into the aeration basin, microorganisms consume this organic matter during the aeration phase. As a result of this biological activity, a significant volume of air is required to support the respiration of these microorganisms.

The ratio of air needed per pound of BOD is an essential operational parameter for wastewater treatment facilities, ensuring that sufficient oxygen levels are maintained for effective treatment. In this context, it is understood that for each pound of BOD, about 1,000 cubic feet of air is generated or required.

This volume supports the microbial processes necessary for breaking down organic material, ultimately resulting in cleaner effluent being released into the environment. Understanding this conversion is critical for optimizing the aeration process and ensuring compliance with environmental regulations.

While the other options suggest larger volumes of air, they exceed the typical requirements observed in standard activated sludge systems, indicating that they may not align with the operational norms in wastewater treatment practices.