Online Monitoring and Control Enhances WWTP Performance & Reduces Operating Costs
YSI and Sanitaire hosted a webinar titled ‘Case Study - Enhanced Performance & Reduced Operating Costs With Online Process Monitoring and Automated Control’ as part of our Water Resource Recovery Facility Webinar Series. 
The presenters included Bulbul Ahmed, Ph.D., P.E. Process Engineer- Water Solutions at Sanitaire and Robert Smith, P.E., BCEE, Ph.D. Applications Engineer- Water Solutions at YSI.
Problem Statement
- Manual blower speed adjustment based on online DO monitoring (Level 2)
- Only able to control blower operation during work hours
- Unstable DO concentration in the aeration basin
- Manual Sludge wasting based on time (Level 1)
- Amount of sludge wasted was unknown
- What happens if the valve failed to close
- What happens if the valve is not closed on time
- Limited success in maintaining desired SRT or MLSS concentration
- Manual chemical dosing (Level 1)
- Ferric chloride (FeCl3 ) for phosphorous removal
- Caustic to recover pH
- Daily composited samples / limited control
Process Performance Optimization Objectives
Test following automatic control algorithms against manual control to examine process stability, treatment performance, and chemical & energy savings potentials Blower Driven Aeration Control
- Phosphorous Removal Chemical Dosing Control
- Operator Desired Solid Retention Time (SRT) Control
- Process Optimized SRT (Smart SRT) Control
- Operator Desired Mixed Liquor Suspended Solids (MLSS) Control 10
Case Study: Enhanced WWTP Performance & Reduced Operating Costs with Online M&C | YSI | Sanitaire from YSI