A dispersed-ozone flotation (DOF) separator for tertiary wastewater treatment. |
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Authors: | P K Jin X C Wang G Hu |
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Affiliation: | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, China. pkjin@xauat.edu.cn |
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Abstract: | A dispersed-ozone flotation (DOF) separator was devised for a pilot study of tertiary wastewater treatment for re-use purposes. As a compact device combining coagulation, ozonation and flotation in an integrated unit, the DOF separator achieved a very high removal of SS, TOC, UV254 and colour, as well as effective inactivation of coliform and total bacteria within a short hydraulic retention time of 30 min. The finished water quality is comparable to or better than that by a conventional tertiary treatment process using coagulation, sedimentation, filtration and chlorine disinfection, and meets the quality standards for non-drinkable domestic reuse. |
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