Pure Oxygen Activated Sludge Process

Abstract

The use of pure oxygen for activated sludge treatment has become competitive with the use of air owing to the development of efficient oxygen dissolution systems. The pure oxygen system may be used for aeration in activated sludge systems that operate in either the plug flow or complete mix hydraulic regimes. It is readily adaptable to new or existing complete mix systems and can be used to upgrade and extend the life of overloaded plug-flow systems. The amount of oxygen that can be injected into the liquid (for a specific set of conditions) is approximately four times the amount that could be injected with an air system. In addition to process description, this chapter discusses covered and uncovered units, design considerations, design parameters and design procedure.