NORWICH – At the City of Norwich Public Works and Public Safety meeting on Thursday, Superintendent of Public Works Carl Ivarson told the committee about repairs needed at the wastewater treatment plant.

During the flooding of late June, there was an excess amount of water coming into the treatment plant. Although the water did cause damage to some of the equiptment, Ivarson’s crew was able to keep the city from losing water and sewer services during the flood.

Heavy flood waters caused damage to the rotating biological contactors, or RBC’s. An RBC is part of the secondary treatment system. Six RBC’s make up each train, and the wastewater plant is comprised of three trains. The RBC is made up of a series of closely spaced, high-density plastic discs supported on a long shaft, and rotated by a mechanical drive. Sewage travels through the primary treatment area, where coarse materials are removed, before passing through the RBC units which work to break down and stabilize organic pollutants.