Details

Autor(en) / Beteiligte

• Brownell, Sarah A
• Chakrabarti, Alicia R
• Kaser, Forest M
• Connelly, Lloyd G
• Peletz, Rachel L
• Reygadas, Fermin
• Lang, Micah J
• Kammen, Daniel M
• Nelson, Kara L

Titel

Assessment of a low-cost, point-of-use, ultraviolet water disinfection technology

Ist Teil von

• Journal of water and health, 2008-03, Vol.6 (1), p.53-65

Ort / Verlag

England: IWA Publishing

Erscheinungsjahr

2008

Quelle

MEDLINE

Beschreibungen/Notizen

• We describe a point-of-use (POU) ultraviolet (UV) disinfection technology, the UV Tube, which can be made with locally available resources around the world for under $50 US. Laboratory and field studies were conducted to characterize the UV Tube's performance when treating a flowrate of 5 L/min. Based on biological assays with MS2 coliphage, the UV Tube delivered an average fluence of 900+/-80 J/m(2) (95% CI) in water with an absorption coefficient of 0.01 cm(-1). The residence time distribution in the UV Tube was characterized as plug flow with dispersion (Peclet Number = 19.7) and a mean hydraulic residence time of 36 s. Undesirable compounds were leached or produced from UV Tubes constructed with unlined ABS, PVC, or a galvanized steel liner. Lining the PVC pipe with stainless steel, however, prevented production of regulated halogenated organics. A small field study in two rural communities in Baja California Sur demonstrated that the UV Tube reduced E. coli concentrations to less than 1/100 ml in 65 out of 70 samples. Based on these results, we conclude that the UV Tube is a promising technology for treating household drinking water at the point of use.