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KMID : 1024520110200030291
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Journal of the Environmental Sciences
2011 Volume.20 No. 3 p.291 ~ p.299
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Reclamation of Effluent Textile Wastewater Using Micro/nano Bubbles-Dissolved Ozone Flotation Process
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Jung Byung-Gil
Lee Ki-Hyung
Jung Jin-Hee
Jang Seong-Ho
Cho Do-Hyun
Sung Nak-Chang
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Abstract
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The main objectives of this research are to investigate characteristics of ozone solubility due to low solubility of conventional bubbles-ozone generators, evaluate the treatment characteristics of reclaiming textile wastewater for industrial water by means of micro/nano bubbles-dissolved ozone flotation(MNB-DOF) process. The textile wastewater used in this research was obtained from final effluent of the textile wastewater in B city. There is a 400L reactor which consists of a micro-nano bubble system and a ozone generator for experiments. As a result of generating micro-nano bubbles (below 0.5 ㎛) by using of MNB-DOF process, it improved ozone solubility due to higher ozone transfer rates. Consequently, the shorter ozonation time clearly indicates the lower power costs. The reported results clearly indicated that MNB-DOF process can be effectively and inexpensively. Results of the experiments through MNB-DOF process in this study satisfy all reclaiming standards as industrial water: pH 6.5～8.5, SS 10 mg/L or below, BOD5 6 mg/L or below, turbidity 10 NTU or below, Coliforms 1,000/100 mL or below. Therefore there is a possibility of the reclaiming of the textile wastewater as industrial water.
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KEYWORD
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Conventional bubbles, Dissolved ozone flotation, Effluent textile wastewater, Industrial water, Micro/nano bubbles, Reclamation, Ozonation
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