Problem: The F. Wayne Hill Water Resources Center in Gwinnett County, Georgia, dewatered biosolids with six Alfa Laval Sharples DS-706 decanter centrifuges. The machines delivered performed well and were reliable, but technology had advanced and the team wanted to explore sustainable solutions.
Solution: The 20-year-old decanters were replaced with ALDEC G3-125 decanters from Alfa Laval that improve performance and efficiency while using fewer resources.
Result: The units increased cake solids from 21% to 23%, reducing weight hauled to landfill by 6,000 tons annually. They also saved more than $300,000 a year polymer costs and saved significant energy. The next phase will add dryers to remove 90% of the water from biosolids, yielding a saleable fertilizer, generating revenue and eliminating hauling costs. 713-934-3160; www.alfalaval.us
