Conventional and Advanced Oxidation Processes Used in Disinfection of Treated Urban Wastewater
| Autor: | Rosa Mosteo, Judith Sarasa, María P. Ormad, Jorge Rodríguez-Chueca, José L. Ovelleiro |
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| Rok vydání: | 2015 |
| Předmět: |
inorganic chemicals
Halogenation Ultraviolet Rays Wastewater Waste Disposal Fluid Water Purification chemistry.chemical_compound Environmental Chemistry Irradiation Cities Operational costs Hydrogen peroxide Waste Management and Disposal Effluent Water Science and Technology Chemistry Ecological Modeling Hydrogen Peroxide Pollution Reagent Sunlight Water Microbiology Oxidation-Reduction Uv treatment Waste disposal Nuclear chemistry |
| Zdroj: | Water Environment Research. 87:281-288 |
| ISSN: | 1554-7531 1061-4303 |
| DOI: | 10.2175/106143014x13987223590362 |
| Popis: | The purpose of the current study is to compare the inactivation of Escherichia coli in wastewater effluents using conventional treatments (chlorination) and advanced oxidation processes (AOPs) such as UV irradiation, hydrogen peroxide (H2O2)/solar irradiation, and photo-Fenton processes. In addition, an analysis of the operational costs of each treatment is carried out taking into account the optimal dosages of chemicals used. Total inactivation of bacteria (7.5 log) was achieved by means of chlorination and UV irradiation. However, bacterial regrowth was observed 6 hours after the completion of UV treatment, obtaining a disinfection value around 3 to 4 log. On the other hand, the combination H2O2/solar irradiation achieved a maximum inactivation of E. coli of 3.30 ± 0.35 log. The photo-Fenton reaction achieved a level of inactivation of 4.87 ± 0.10 log. The order of disinfection, taking into account the reagent/cost ratio of each treatment, is as follows: chlorination > UV irradiation > photo-Fenton > H2O2/sunlight irradiation. |
| Databáze: | OpenAIRE |
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