Automatic Sludge Blanket Control in an Operating Gravity Thickener

摘要

The purposes of this study were to evaluate some of the hardware required to monitor and control the operation of a gravity thickener and to identify any benefits associated with improved sludge blanket level control. An automatic sludge blanket level control system was installed in one of the six gravity thickeners at the Metropolitan Waste Water Treatment Plant. In addition, optical type solids analyzers were installed to monitor the inflow, overflow, and underflow streams of two basins - one with automated blanket level control and one with manual control. The performance characteristics of the instruments were documented during a series of five tests.