Improved capacity and space savings
Problem
The 3.15 mgd (design) treatment plant in Marseilles, Ill., averaged 1.25 mgd and produced 55 dry tons of biosolids per year. Increased solids production taxed the capacity of the drying beds, which took two to six months to dry in ideal conditions. Aerobic cake averaged 17 to 19 percent solids and anaerobic 20 to 24 percent. “The cake had to be stored for three years before land-applying it,” says Don Christensen, wastewater superintendent. “We were running out of storage options and needed more dewatering capacity, but had no extra space for it.”
Solution
The city installed a 900/2000CV
