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Open Access UV Disinfection Leads to Regulatory Approval of Higher Filtration Rates and Increased Plant Capacity

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Abstract:

The Frederick County Department of Utilities and Solid Waste Management has entered into a supply agreement with the City of Frederick, Maryland to provide up to 8 MGD of drinking water as early as 2008. This requires that the capacity of the New Design Road Water Treatment Plant be more than doubled in the next two years while simultaneously complying with the Stage 2 Disinfection By-Product and Long Term 2 Enhanced Surface Water Treatment Rules. One means of achieving the plant capacity required by the supply agreement was to re-rate the existing filters. An innovative use of ultraviolet light (UV) disinfection was negotiated with the Maryland Department of the Environment to allow an increase in the plant's filtration rate from 4 gpm/sf to 5 gpm/sf. By incorporating UV disinfection into their plants, some treatment facilities may have the opportunity to increase plant capacity without construction of new conventional treatment processes.

Keywords: DISINFECTION; DRINKING WATER; INCREASED CAPACITY; OPTIMIZATION; SURFACE WATER; ULTRAVIOLET LIGHT; UV; WATER TREATMENT

Document Type: Research Article

DOI: https://doi.org/10.2175/193317707X224103

Affiliations: 1: Hazen and Sawyer, 11242 Waples Mill Rd, Ste 250, Fairfax, Virginia, 22030 2: Frederick County Division of Utilities and Solid Waste Management, 4520 Metropolitan Court, Frederick, Maryland, 21704 3: HDR, 128 South Tryon St, Ste 1400, Charlotte, North Carolina, 28202 4: Rummel, Klepper & Kahl, 3512 Concord Road, York, Pennsylvania, 17402

Publication date: 2007-07-01

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