City moves forward with repairs to sewer plant
NORWICH – Flooding last June, combined with the regular wear and tear of over 20 years of operation, has made it necessary for the City of Norwich to make repairs to parts of the Wastewater Treatment Plant.
Mayor Joseph Maiurano said the repairs at the wastewater plant would be one of the two big projects being looked at this year – the other being the construction of a new water filtration plant.
In need of repair are the Rotating Biological Contactors (RBCs). The RBCs are part of a secondary treatment system. Six RBCs 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 breakdown and stabilize organic pollutants.
Delaware Engineering estimated the total cost of the repairs would be between $3.2 and $3.3 million.
“We’re in the process of going after grants and low-interest loans to keep the impact on the taxpayers to a minimum,” said Maiurano. The mayor explained making repairs to the system now may help the city in the awarding of future grants.
“By fixing this, (the RBCs) it will help in the entire Susquehanna River Basin area, and it will help us meet Department of Environmental Conservation regulations, because we will be releasing less nitrous and phosphorous into the environment. That should enable us to get more grants in the future,” Maiurano said.
Expected future requirements may require the addition of a chemical feed facility to enhance phosphorus removal. The chemical feed would be located in an existing building. According to Superintendent of Public Works Carl Ivarson, most of the pieces are already in place for the chemical feed facility. “It will only require small modifications that we expect to do in-house,” Ivarson said.
To keep the plant operational, repairs must be made to one train at a time, so two trains are still available to keep the plant functioning. Once repairs to a train are completed, it will take 30 days before the train is operational, because biological growth must be re-established. To repair all three trains, it will probably take a whole year, Ivarson said at a meeting earlier in the year. He expects actual construction to begin by January.
Mayor Joseph Maiurano said the repairs at the wastewater plant would be one of the two big projects being looked at this year – the other being the construction of a new water filtration plant.
In need of repair are the Rotating Biological Contactors (RBCs). The RBCs are part of a secondary treatment system. Six RBCs 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 breakdown and stabilize organic pollutants.
Delaware Engineering estimated the total cost of the repairs would be between $3.2 and $3.3 million.
“We’re in the process of going after grants and low-interest loans to keep the impact on the taxpayers to a minimum,” said Maiurano. The mayor explained making repairs to the system now may help the city in the awarding of future grants.
“By fixing this, (the RBCs) it will help in the entire Susquehanna River Basin area, and it will help us meet Department of Environmental Conservation regulations, because we will be releasing less nitrous and phosphorous into the environment. That should enable us to get more grants in the future,” Maiurano said.
Expected future requirements may require the addition of a chemical feed facility to enhance phosphorus removal. The chemical feed would be located in an existing building. According to Superintendent of Public Works Carl Ivarson, most of the pieces are already in place for the chemical feed facility. “It will only require small modifications that we expect to do in-house,” Ivarson said.
To keep the plant operational, repairs must be made to one train at a time, so two trains are still available to keep the plant functioning. Once repairs to a train are completed, it will take 30 days before the train is operational, because biological growth must be re-established. To repair all three trains, it will probably take a whole year, Ivarson said at a meeting earlier in the year. He expects actual construction to begin by January.
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