Powdered Activated Carbon Optimization Study
Jardine and South Water Purification Plants
A powdered activated carbon (PAC) optimization study was performed for Chicago's 1,100 mgd Jardine Water Purification Plant and 700 mgd South Water Purification Plant. The study consisted of the following:
- Field inspections of the conditions of existing PAC facilities.
- Field testing of the accuracy of the methods and facilities used to measure and control the concentrations, volumes and feed rates of PAC slurries.
- Discussions with plant personnel regarding deficiencies in the existing PAC systems.
- Analyses of plant operating data to determine if target PAC feed rates were being met.
- Analyses of the appropriateness of PAC application points and dispersion methods.
- Analyses of the amount of pretreatment chlorine consumed by the PAC added.
Recommendations were made regarding:
- Reduced slurry pipe clogging
- Improved consistency in slurry concentrations
- Improved slurry storage tank liquid level measurements
- Improved slurry feed rate metering and control
- Improved PAC dispersion and contact time
- Reduced inconsistency between PAC supply and demand
Construction cost opinions for the recommended facilities were also prepared.