The efficacy of three commercial ultraviolet (UV) units - IWG 1-M-15, Trojan AUV 705, and Atlantic MP22
- was quantified using the biodosimetric method with flow-through test facility experiments
outlined in the NSF 55-1991 Standard as a guideline. The inactivation achieved across each UV
reactor was quantified and compared to the UV dose-response curve to determine the UV dose
delivered by the unit. Batch irradiation experiments performed with the Collimated Beam Apparatus
(CBA) established the UV dose-response curve for each microorganism tested - Bacillus subtilis
spores (strains ATCC 9372, 1A1), and MS2 bacteriophage (ATCC 15597-B1). Results show that at
a flow rate of 2.5, 5.0, and 10-gpm, the International Water Guard (IWG 1-M-15) unit delivered
approximately 70, 40-45, and ~35-mJ/cm2, respectively; and, the Trojan AUV 705 unit delivered
70, 40, and 30-mJ/cm2. At flow rates of 5, 6, and 10-gpm, the Atlantic Mighty Pure (M22) unit
delivered approximately 40, 28, and 24-mJ/cm2. With the error limits of the results, all units met
or exceeded the manufacture's claims.
Includes 5 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 470 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 17 |
| Published : | 11/01/2002 |
