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气液两相纳秒脉冲放电反应器放电特性及其对藻类的灭活效果

DOI: 10.13336/j.1003-6520.hve.2015.10.043, PP. 3499-3504

Keywords: 气液两相纳秒脉冲放电,多喷嘴-板式,放电等离子体,电气特性,能量效率,杀灭率

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Abstract:

液相高压脉冲放电产生的强氧化性活性物质和紫外光、冲击波等可以有效地用于水处理。为此,以扁藻作为处理目标物,采用多喷嘴-板式水处理装置和气液两相纳秒负脉冲放电形式,分析了反应器电气特性、不同放电参数对扁藻杀灭率的影响。实验结果表明,随着脉冲峰值电压的增大,单脉冲能量随之增加;能量效率先增后减,在脉冲峰值电压为-7.6kV时出现拐点,此时能量效率为34.1%。扁藻的杀灭率随着脉冲峰值电压、脉冲重复频率、放电处理时间的增加而增大;随着鼓气速率的增大,扁藻的杀灭率呈现先增后减的趋势。当脉冲峰值电压为-9.4kV、鼓气速率为70mL/min、循环速率为380mL/min、放电处理时间为30min、脉冲重复频率为70Hz时,扁藻的杀灭率为100%。

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