کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
588705 878594 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced treatment of practical textile wastewater by microbubble ozonation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Enhanced treatment of practical textile wastewater by microbubble ozonation
چکیده انگلیسی

In this paper, microbubble technology was employed to increase the mass transfer rate of ozone and enhance the ozone oxidation of practical textile wastewater. Experiments were performed using a microbubble generator and a bubble contactor, which is commonly used in ozonation system, for comparison. The microbubble generator produced a milky and high intensity microbubble solution, which could reach a higher oxygen transfer rate at a lower input gas flow rate. A volumetric oxygen transfer rate (VOTR) of 0.086–0.413 kg/m3 h and a total mass transfer coefficient of 0.1072–0.4859 min−1 were obtained at airflow rates of 0.02–1.5 dm3/min. During the ozonation of practical textile wastewater by using the microbubble system, the input ozone could be almost completely utilized, and the rate of decolorization and organic reduction were much faster than those of the bubble contactor. For the practical textile wastewater tested, the time required for 80% removal of color was about 140 and 280 min by ozone microbubble and conventional bubbles, respectively. The chemical oxygen demand (COD) removal efficiency in the microbubble system was higher by 20%. The results revealed that in addition to the enhancement of the mass transfer of ozone, microbubbles could improve the oxidation of actual textile wastewater.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 86, Issue 5, September 2008, Pages 389–393
نویسندگان
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