In order to comply with new surface-water treatment standards, the City of Norwich needed to replace and decommission its more than 100-year-old pressure filter water treatment plant located more than a mile from the existing reservoirs.
Delaware Engineering provided planning, a six-month micro-filtration pilot study, design, construction administration and on-site inspection services for a four prime contract project to construct a new 1.2 MGD Water Treatment Plant. The new 52’x90’ pre-engineered steel building houses the below-slab tanks, vertical turbine pump systems for feed and backwash pumps, Pall Micro-filtration system, chemical feed systems, laboratory, and an inclined plate settling system to treat the filter backwash waste. Sludge from the plate settlers flows to a sludge storage tank, and the City then transports the waste solids to the City WWTP for disposal. Treated waste flows to a post-aeration tank for final D.O. treatment. The new plant design includes electrical capacity and reserve area for future UV disinfection if required.
The City blends the treated reservoir water with well water on a daily basis to maintain a moderate hardness level.
Delaware assisted the City with obtaining USDA-RD funding procurement, to obtain a $1 million grant and $4 million low-interest loan.
Project Cost: $6.1 million
Facility Capacity: 1.2 MGD