Process of Oxygen Transfer and Power Requirements in Activated Sludge Wastewater Treatment Plant

The number of parameters must be adjusted to ensure an optimal aeration in the WWTP. In this article the emphasis will be on parameters which have influence on the oxygen transfer and power requirements in activated sludge wastewater aeration system. The efficiency of oxygen transfer depends on many factors including type, size and shape of diffusers and tank geometry. The effects of water temperature, total dissolved solids, pressure and operating dissolved oxygen are also defined. Effective control of the air supply may significantly reduce the operational costs of wastewater treatment. The oxygen transfer efficiency of an aeration system is the ratio of the amount of oxygen that actually dissolves into water to the total amount of oxygen pumped into the water. Only dissolved oxygen is available for treatment and any portion of oxygen that does noi dissolve is a waste of energy and money.