Ultraviolet disinfection specifically designed for secondarily treated wastewater

Dr. James Cruver, president of Salcor Engineering, Inc., author of over 40 scientific papers and a text book on ultra violet treatment, has designed and manufactures a UV sterilizing unit expressly for gravity flow from a secondary treatment plant or sand filter.

Features include:

• Insures public health protection on problem or ecologically sensitive sites without the undesirable chemical externalities of chlorine or mechanical complexity of ozone generators by supplying 30,000 μWs/cm² of UV radiation (16,000 μWs/cm² required to meet USPHS standards for drinking water - 6,600 to kill E. coli.)
• Installed below grade with easily removable components
• Fluoropolymer coated to resist bio-fouling and chemical encrusting
• Low power requirement, only 24 watts (about the same as a light in a refrigerator)
• Very effective, in 10 months of monitoring by public laboratory, in Juneau, Alaska, no E. coli. bacteria were detected in effluent from a secondary treatment package plant (MPN less than 2.2 c.f.u.)
• Servicing required just twice per year (clean the Teflon sleeve every six months and replace bulb once every 24 months)
• Manufactured by a leading company in UV technology with nearly 20 years of experience. Installations include sterilizing banana smoothies and other opaque fruit juices, water supplies for salmon hatcheries protecting against highly infectious viral diseases, as well as up to 10 million gal day -1 wastewater flows.

Left picture shows the inside design of the how the electrical box works. The right picture shows that the new design has a waterproof electrical box, which has undergone extensive submersion testing to ensure a waterproof seal.

Contact WetlandsPacific Corp. for a copy of a paper by Dr. Cruver presented at 9th University of Washington On-Site Wastewater Treatment Short Course, Sept. 1997, Seattle, WA, USA.

See also Cruver, J. (1995). Proceedings, 8th NW On-Site Wastewater Treatment Short Course and Equipment Exhibition, Sept. 18-19, R. W. Seabloom Ed, Univ. of Wash Dept. Civil Engineering/Wash State Dept. Health, pp. 167-182, Seattle, WA, USA for an addition paper by Dr. Cruver on UV disinfection of small flows wastewater.