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Cooperation effect between non-thermal plasma and flocculants for treatment dyeing wastewater |
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Abstract The cooperation effects of non-thermal plasma assisted with flocculants to clean dyeing wastewater have been investigated in this paper. The new way can shorten the dealing time and improve the rate of de-colorization and de-COD. The results showed the de-colorization and de-COD ratios increased with the increasing of input voltage and discharge time. The distance between discharge electrodes, initial concentration of dyeing wastewater and air flow to input wastewater have a significant impact on purification efficiency. The effect of discharge in gas phase is better then in liquid phase. When the anode pole is up the water level about 8mm the treatment can get good result. When the other operation conditions are unchanged, the ratio of de-colorization and de-COD increased and then decreased with the increasing of the initial concentration and air flow. The initial concentration and air flow has a peak value, respectively. The effect of dyeing wastewater treatment by adding flocculants into wastewater after discharged is better than by putting flocculants before discharged and only by plasma discharged. In this experiment when the wastewater initial value of CODcr is 572, input voltage 40kV, discharge time 20min, the anode pole up level 8mm, air flow 16L/h and associates with flocculants the ratio of de-colorization and de-COD reach 96% and 63%, respectively.
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Received: 25 January 2010
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