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http://dx.doi.org/10.4491/KSEE.2017.39.10.549

Efficient Micro-Ozone-Bubble Generation by Improving Ozone Dissolution Tank Structure  

Park, Yong-hwa (Graduate School of water Resources, Sungkyunkwan University)
Lee, Gwang-hi (Research institute at Haesung Engineering Inc)
Jang, Am (Graduate School of water Resources, Sungkyunkwan University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.39, no.10, 2017 , pp. 549-555 More about this Journal
Abstract
The purpose of this study is to investigate how ozone-dissolution-tank structure affects micro-ozone-bubble distribution, energy consumption and water treatment efficiency. The partition walls inside the ozone-dissolution-tank generate pressure changes, shear forces, and swirling flows, which change the size of the bubble diameter. The size of the bubble diameter differs by 10.5% depending on the partition walls. Changes in ozone-bubble diameter are related to energy consumption. As the ozone-bubble becomes smaller, the bubble generation energy increases, but the ozone production energy decreases as the dissolution efficiency increases. Therefore, an ozone-dissolution-tank should be determined by means of an optimal condition producing a micro-ozone-bubble with a minimum sum of bubble generation energy and ozone production energy. The energy consumed to inject the same amount of ozone into the effluent differs by 2.5% depending on the partition walls. However, considering the water treatment efficiency, the conditions for selecting the ozone-dissolution-tank are variable. This is because the free radicals that increase as the ozone-bubble gets smaller are very efficient for water treatment. Even at the same ozone injection concentration, the water treatment efficiency differs by 10.4% according to the partition walls. Therefore, we have studied ozone-dissolution-tank structure which produces reasonable ozone-bubble considering water treatment efficiency and energy efficiency.
Keywords
Wastewater Reuse; Ozone; Ozone Dissolution Tank; Micro Bubble; Water Reuse;
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