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OLS Field Name OLS Field Data
Main Title Ultraviolet disinfection of a secondary wastewater treatment plant effluent /
Author Scheible, O. K. ; Bassell, Carlene D.
Other Authors
Author Title of a Work
Bassell, C. D.
CORP Author HydroQual, Inc., Mahwah, NJ.;Municipal Environmental Research Lab., Cincinnati. Wastewater Research Div.
Publisher U.S. Environmental Protection Agency, Municipal Environmental Research Laboratory,
Year Published 1981
Report Number EPA/600/2-81/152; EPA-R-804880
Stock Number PB81-242125
Subjects Sewage--Purification--Activated sludge process.
Additional Subjects Sewage treatment ; Ultraviolet radiation ; Disinfection ; Field tests ; Cost analysis ; New Jersey ; Technology ; Design criteria ; Performance evaluation ; Secondary sewage treatment ; Waldwick(New Jersey)
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB81-242125 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 167 pages : illustrations ; 28 cm
Abstract
Ultraviolet disinfection of a full-scale secondary effluent was investigated during a 13-month field study at Waldwick, New Jersey. The experimental program was designed to demonstrate the feasibility of achieving a fecal coliform density of 200 MPN/100 ml by ultraviolet irradiation; to determine the efficiency of ultraviolet disinfection relative to dosage, power consumption, and effluent water quality; and to assess the utility of the full-scale unit relative to O&M requirements. The impact of photoreactivation was investigated during the field program. Uniform procedures for the calculation of dose and the sizing of ultraviolet systems were also developed. Second order dose-response relationships were developed and were found to provide a rational expression of the microbial response to ultraviolet dose. The ultraviolet absorbance coefficient, k (1/cm), was found to be an excellent parameter for use in the dose expression and in the design sizing of U.V. systems. Photoreactivation was observed and was significantly dependent upon temperature. The phenomenon could result in an order of magnitude increase in coliform density at a temperature of 20 degrees C. The process was determined to be very flexible and simple in operation, requiring minimal maintenance. Costs were estimated to range between 1.2 and 0.8 cents/cu m (4.5 and 3.0 cents/1000 gal) for typical secondary treatment plants with flows between 0.044 and 4.4 cu/sec (1 and 100 mgd), respectively.
Notes
Caption title. "August 1981." "EPA-600/2-81-152." Microfiche.