AWWA WQTC62513

This slide presentation presents a treatment plant optimization effort by the Birmingham, Alabama, Water Works Board. Project objectives included: design and build a mobile conventional treatment pilot plant;use pilot plant to test treatment modifications off-line; and,work to optimize current treatment practices to meet upcoming regulations as well as test alternative processes, e.g. granular activated carbon (GAC). The overall testing approach included: design and construction of pilot plant; bench scale tests for screening of process alternatives; pilot testing for verification of selected alternatives; and, recommendations and implementation. A second part of the project involved a distribution system pilot study with objectives that included: investigate possible leaching of aluminum, lead, and copper already present in the distribution system during a transition from higher to lower pH levels system-wide;quantify concerns about possible destabilization of protective calcium carbonate layers on unlined cast iron and galvanized pipe;evaluate switch from free chlorine to chloramines on pipe corrosion; assess advantages / disadvantages of switching to a corrosion inhibitor for corrosion control; and,recommend a corrosion inhibitor for full-scale consideration ifnecessary. Overall pilot test results for treatment plant optimization included: optimized organics removal;maintain turbidity removal; and,reduce finished water aluminum,resulting in lower finished water pH. Overall pilot test results for the distribution system included: corrosion control strategy outlined; and,developed plan to minimize transient poor water quality with finished water pH change.

Product Details

Edition:

Vol. - No.

Published:

11/01/2005

Number of Pages:

28

File Size:

1 file , 3.3 MB