Process Evaluation Provides Optimization and Energy Reduction

Due to increasing public interest in water purity, and projected sharp increases in energy costs in
the near future, Wastewater Treatment Plants (WWTP) are becoming interested in optimizing
their activated sludge process to reduce operating costs, and stabilize process operation. This
paper presents an activated sludge process evaluation that describes how aeration energy savings
of 23 to 45% and process stability can be obtained by controlling the Solids Retention Time
(SRT) and Dissolved Oxygen (DO).