Author(s)

W. Ward, D.A. Vaccari, D. McMahon, S. Rivera & E. Wojciechowskik

Abstract

The activated sludge process (ASP) is the most common method of treating wastewater. Failures in the ASP are usually related to the discharge of total suspended solids (TSS) in the effluent. A recent case involves a 70 million gallon per day regional wastewater treatment plant. As a result of this plant's violating its permitted discharge limitations for TSS, a construction ban was imposed, resulting in significant local economic problems. The remedy for this problem involved construction of new treatment units to increase capacity. Many plants have similar problems, or will have to face them as regional growth increases their loading. However, it is likely that capacity could be increased without new capital construction by using control techniques to operate the current

Keywords