Effect of Bioflocculation on Ultraviolet Disinfection
Presence of particles is known to decrease the effectiveness of ultraviolet (UV) disinfection by shielding the targeted microorganisms from UV rays. Majority of the previous studies have focused on the particles, and the effect of bioflocculation process and final floc characteristics have not been addressed in the literature. This study aims to provide a good understanding on the effect of particles, flocs and the flocculation process on UV disinfection by using a stable, well-defined and well-controlled synthetic system that can simulate the bioflocculation of particles in water and wastewater samples. The synthetic system was created by using latex particles, alginate, and divalent cations, and the flocculation of particles was achieved naturally without using coagulants. Latex particles can be purchased at selected particle sizes and surface characteristics which make them ideal for well-controlled UV inactivation tests. Three different sizes of latex particles were used in this study: 1, 10, and 45 microns. E. coli was spiked in water samples containing the desired particle counts, and the rate of flocculation was controlled by varying the alginate and calcium concentrations. The results indicate that bioflocculation process significantly impacts the UV disinfection, and particles and flocs have different effects on UV disinfection. In future studies, a distinction between particles and flocs should be made to better evaluate the effect of particle-microbe association on UV disinfection.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2009-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites