The Town of Walkersville (Town) is located in Frederick County in northern Maryland. The ground water wells were known to be under the influence of surface water. In 1999, a rupture in a sewer line caused over a million gallons of raw sewage into the Town’s well aquifer, causing plant shutdown, boil water notices, and pumping raw water to the sewer system for weeks. In 2008, a manure spill incapacitated the water treatment plant (WTP) for extended periods of time. Temporary emergency provisions and connection to the County water system were required. High Fecal coliforms were detected in the well water. The old WTP was over 45 years old and utilized pressure filtration, Ion Exchange Nitrate removal, and Ion Exchange softening followed by disinfection, which used a significant amount of salt, added Sodium to the drinking water, and did not provide protection against potential contamination of source waters. The Town management and staff evaluated various options and looked for budget allocations and finance to address the above issues. The Town decided to build a new advanced WTP. The basis of design for the new plant was established as 1.0 Million Gallons per Day (MGD) average daily capacity and 1.5 MGD in the month of maximum use. The new facility is an Integrated Membrane System (IMS), one of the first drinking water IMS in the State of Maryland, consisting of pretreatment, Microfiltration (MF), Reverse Osmosis (RO), Chlorine primary disinfection, UV secondary disinfection, Fluoridation, and post pH adjustment.
This presentation is available to AMTA Members only.
- Ben Movahed
- WATEK Engineering Corporation
- AMTA/AWWA Membrane Technology Conference, West Palm Beach, FL
- AMTA/AWWA Membrane Technology Conference
- Integrated Membrane System, Microfiltration, Reverse Osmosis