Automation of Water Resource Recovery Facilities. Water Environment Federation

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       8.2.1 Process Description

       8.2.2 Process Variables

       8.2.3 Controlled Variables

       8.2.4 Control Strategies

       8.3 Denitrification Control

       8.3.1 Process Description

       8.3.2 Process Variables

       8.3.3 Controlled Variables

       8.3.4 Control Strategies

       8.4 Activated Sludge Clarifier Blanket Level Control

       8.4.1 Process Description

       8.4.2 Process Variables

       8.4.3 Controlled Variables

       8.4.4 Control Strategies

       8.5 Waste Sludge Control

       8.5.1 Process Description

       8.5.2 Process Variables

       8.5.3 Controlled Variables

       8.5.4 Control Strategies

       9.0 CHEMICAL FEED SYSTEMS

       9.1 Disinfection Control

       9.1.1 Process Description

       9.1.2 Process Variables

       9.1.3 Controlled Variables

       9.1.4 Control Strategies

       9.1.4.1 Feed-Forward Flow Proportioning

       9.1.4.2 Simple Residual Feedback Control

       9.1.4.3 Flow and Residual Control

       9.2 Dechlorination Control

       9.2.1 Process Description

       9.2.2 Process Variables

       9.2.3 Controlled Variables

       9.2.4 Control Strategies

       9.2.5 Difficult-to-Measure Process Variable

       9.2.6 Time Delays

       9.2.7 Feed-Forward Control

       9.2.8 Feedback and Compound Control

       9.2.9 Two-Step Control

       9.2.10 Dechlorinated Final Effluent Residual Measurement

       9.2.11 Recommendations

       10.0 THICKENING CONTROL

       10.1 Gravity Thickening Control Strategies

       10.1.1 Process Description

       10.1.2 Process Variables

       10.1.3 Controlled Variables

       10.1.4 Control Strategies

       10.1.4.1 Sludge Removal Flow Control

       10.1.4.2 Sludge Blanket Control

       10.1.4.3 Solids Concentration Control

       10.1.4.4 Rake Torque Control

      

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