Problem: The Sanitary District of Decatur, Illinois, had an aging dissolved air flotation thickening (DAFT) system that was not producing the thickened solids required by the digester. Solids content was 3 to 3.5 percent. Requirements also called for a reduction in moving parts on the next equipment installation.
Solution: The district installed three ThickTech rotary drum thickeners from Parkson Corp. taking up one-third of the footprint of the original units and containing far fewer moving parts.
Result: The district has increased the thickened solids content to 5.5 to 6 percent, reduced chemical costs and achieved its goal of a lower-maintenance system. 888/727-5766