Formation of oxidation byproducts from ozonation of wastewater.
Enviado por Fernando Rosario-Ortiz el
Título | Formation of oxidation byproducts from ozonation of wastewater. |
Publication Type | Journal Article |
Year of Publication | 2007 |
Autores | Wert, EC, Rosario-Ortiz, FL, Drury, DD, Snyder, SA |
Journal | Water Res |
Volume | 41 |
Issue | 7 |
Pagination | 1481-90 |
Date Published | 2007 Apr |
ISSN | 0043-1354 |
Palabras clave | Biological Assay, Chromatography, High Pressure Liquid, Chromatography, Ion Exchange, Disinfectants, Hydrogen Peroxide, Mass Spectrometry, Organic Chemicals, Oxidation-Reduction, Ozone, Waste Disposal, Fluid, Water Purification |
Abstract | Disinfection byproduct (DBP) formation in tertiary wastewater was examined after ozonation (O(3)) and advanced oxidation with O(3) and hydrogen peroxide (O(3)/H(2)O(2)). O(3) and O(3)/H(2)O(2) were applied at multiple dosages to investigate DBP formation during coliform disinfection and trace contaminant oxidation. Results showed O(3) provided superior disinfection of fecal and total coliforms compared to O(3)/H(2)O(2). Color, UV absorbance, and SUVA were reduced by O(3) and O(3)/H(2)O(2), offering wastewater utilities a few potential surrogates to monitor disinfection or trace contaminant oxidation. At equivalent O(3) dosages, O(3)/H(2)O(2) produced greater concentrations of assimilable organic carbon (5-52%), aldehydes (31-47%), and carboxylic acids (12-43%) compared to O(3) alone, indicating that organic DBP formation is largely dependent upon hydroxyl radical exposure. Bromate formation occurred when O(3) dosages exceeded the O(3) demand of the wastewater. Bench-scale tests with free chlorine showed O(3) is capable of reducing total organic halide (TOX) formation potential by at least 20%. In summary, O(3) provided superior disinfection compared to O(3)/H(2)O(2) while minimizing DBP concentrations. These are important considerations for water reuse, aquifer storage and recovery, and advanced wastewater treatment applications. |
DOI | 10.1016/j.watres.2007.01.020 |
Alternate Journal | Water Res. |
PubMed ID | 17335867 |