Fine grit accumulation in the aeration tank Grit removal helps Niagara aeration process breathe again Niagara County Waste Water Treatment Plant Introduction Grit composition at the Niagara County Waste Water Treatment Plant (WWTP) in New York State is characterized by very fine, slow-settling particles. Undetected for eight years, it was choking the efficient operation of the plant. In particular, Niagara was experiencing deterioration in its aeration process: submerged fine air diffusers were fouling due to the accumulation of fine grit particles in the aeration tanks. Having seen a successful grit removal system in operation at a nearby plant in Buffalo, NY, Niagara installed a Hydro International SlurryCupTM and Grit Snail® system, which enabled tank cleaning times and costs to be sign

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