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Title: |
Treatment of Cutting and Emulsifying Wastewater Using Non-Thermal Plasma |
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Source: |
International Workshop on Diffuse Pollution-Management Measures and Control Technique (IWDCT 2010 E-BOOK)
(pp 340-344)
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Author(s): |
Yongtao Qi, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001
Jing Chen, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001
Tao Liu, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001
Xinmin Zhang, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001
Xia Liao, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001
Can Cui, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001
Minggong Chen, School of Chemical Engineering of Anhui University of Science and Technology, Anhui Huainan 232001 |
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Abstract: |
The technology of non-thermal plasma was used to treat cutting and emulsifying wastewater andinvestigate the effect of initial pH value of wastewater, several kinds of inorganic salt or not, velocity of airflow、electrode distance、input voltage, discharge time on wastewater treatment ratio. The experiment resultsshow: the effect of wastewater purifying ratio increases with prolonging the plasma discharge time, the effectof wastewater purifying tends to steady after discharge time exceeds 120min; acidic conditions of wastewateris benefit to improve purifying ratio then basic condition. Putting a little of inorganic salt can increase the effectof wastewater purifying ratio, in this experiment, the effect of CaCl2 is better than Al2(SO4)3、FeSO4、NaCl. The distance between electrodes have more effects of wastewater treatment, the purifying ratio of gasphase discharge is better then liquid phase discharge and gas-liquid interface. Putting air into the wastewatercan increase the effect of treatment, but when the velocity of airflow is too high the residence time will beshort and then reduce the purifying ratio. The purifying ratio increases with the increasing of input voltage. Inthis experiment when the input voltage is 25kV, electrode distance 35mm, airflow 0.2L/min, CaCl2 1.6g/L,discharge time 30 min, the removal ratio of COD and turbidity could reach 90% and 92%, respectively.
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