Abstract
This studywas conducted to evaluate the ozone,UVandO3/ UVprocesses for the reuse of sewage treatment plant effluent (Universidad AutonomaMetropolitana Azcapotzalco wastewater treatment plant). The ozone/UV process was compared to individual ozone and the UV processes and control parameters were total and fecal coliforms. Different ozone concentrations (6-12 mg O3/min) and different UV fluencies (6.7-20.12 mJ/cm2) were tested. It is possible to conclude than none of the processes achieved the disinfection levels required to comply with the Mexican standard NOM-003-SEMARNAT-1997. The continuous ozone process offered the lower total and fecal coliforms reductions, while UV light resulted a disinfection agent with higher germicide power than ozone. The maximum logarithmic reduction achieved due to the combined ozone/UV process was of 2.04 for fecal coliforms and of 2.17 for total coliforms. The next 8 combinations showed lower removal efficiencies, but always higher than those obtained with the single ozone or UV processes. The ozone/UV process was highly effective for the disinfection and a synergistic effect was observed.
Original language | English |
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Pages (from-to) | 1715-1719 |
Number of pages | 5 |
Journal | Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering |
Volume | 45 |
Issue number | 13 |
DOIs | |
State | Published - Nov 2010 |
Keywords
- Disinfection
- Ozone
- Ozone/UV
- Reuse
- Synergistic effect
- Total and fecal coliforms
- UV