Dynamic control of a continuous-inflow SBR with time-varying influent loading

Area of Science:

• Environmental Engineering
• Water Treatment Technologies
• Process Control

Background:

• Conventional Sequencing Batch Reactors (SBRs) rely on fixed operational phases, necessitating large equalization units to manage influent variability.
• Influent flow rates and water quality fluctuations challenge the efficiency of traditional SBR control, increasing treatment costs, particularly for small-scale systems.
• Optimizing SBR performance with time-varying influent loads is difficult using standard sequential control methods.

Purpose of the Study:

• To present a novel dynamic control strategy for continuous-inflow SBRs.
• To address challenges posed by time-varying influent flow rates and water quality.
• To improve substrate removal efficiencies and reduce overall treatment costs in SBR systems.

Main Methods:

• Implementation of on-line Oxidation-Reduction Potential (ORP) monitoring.
• Integration of on-line pH monitoring for real-time process adjustments.
• Application of dynamic control to a continuous-inflow SBR system with variable loading.

Main Results:

• The dynamically controlled SBR demonstrated enhanced substrate removal efficiencies compared to conventional methods.
• Significant reductions in overall wastewater treatment costs were observed.
• The system effectively managed time-varying influent flow rates and water qualities.

Conclusions:

• On-line ORP and pH monitoring enable effective dynamic control of continuous-inflow SBRs.
• Dynamic control offers a cost-effective solution for treating variable wastewater streams.
• This approach optimizes SBR performance and reduces the need for extensive pre-treatment equalization units.