Main Title |
Ultraviolet Disinfection of Activated Sludge Effluent Discharging to Shellfish Waters. |
Author |
Roeber, J. A. ;
Hoot., F. M. ;
|
CORP Author |
Saint Michaels, Md.;Municipal Environmental Research Lab., Cincinnati, Ohio.;Clow Corp., Florence, Ky. |
Year Published |
1975 |
Report Number |
EPA-WPRD-139-01-68; EPA/600/2-75; |
Stock Number |
PB-249 460 |
Additional Subjects |
Activated sludge process ;
Disinfection ;
Ultraviolet radiation ;
Sewage treatment ;
Water pollution ;
Animal ecology ;
Municipalities ;
Coliform bacteria ;
Turbidity ;
Chemical removal(Sewage treatment) ;
Shellfish ;
Chemical reactions ;
Photosensitivity ;
Exposure ;
Static tests ;
Maryland ;
Saint Michaels(Maryland) ;
Chemical oxygen demand
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-249 460 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
96p |
Abstract |
A tertiary treatment plant and an ultraviolet disinfection chamber were installed following an activated sludge plant at the municipal sewage treatment plant in St. Michaels, Maryland. The multiple-tube fermentation technique was used to determine the total coliform MPN Index after varying exposures to ultraviolet radiation. Batch tests were sampled at various intervals under constant radiation and flow-through tests were sampled before and after undergoing radiation. The standard to be met was an MPN of not more than 70 per 100 ml. In flow-through tests this was usually achieved with a flow not in excess of 40,000 gallons per day, with a turbidity of less than 11 JTU, using sixteen germicidal 36 watt ultraviolet lamps, an energy application of .035 KWH/1000 gallons. The absorption of ultraviolet radiation, as measured by the absorption coefficient, was much more dependent on COD than on turbidity, indicating the appearance of the effluent is not the best criterion for estimating the rate of U.V. treatment unit. |
Supplementary Notes |
Prepared in cooperation with Clow Corp., Florence, Ky. |
NTIS Title Notes |
Final rept. 1968-72. |
PUB Date Free Form |
Dec 75 |
Category Codes |
13B; 68D; 91A |
NTIS Prices |
PC A05/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326613749 |
Origin |
NTIS |
Type |
CAT |