管流电氧化杀藻及其影响要素

对藻种类、电流密度、电极材料、细胞密度和流量对电化学氧化杀藻的影响进行了研究.实验结果显示,铜绿微囊藻比水华鱼腥藻对电化学氧化更为敏感,藻的种类和形状对杀藻效果存在影响.使用普通镀锌水管、铜水管和钛管作为阴极进行实验,发现阴极材料对结果影响不大,而阳极对杀藻效果影响较大,钌钛电极效果明显好于钛电极.电流密度对杀藻效果影响很大,电流密度为1mA.cm^-2时,杀藻效果不明显,当电流密度大于2.5mA.cm^-2时,杀藻效果开始非常显著.细胞密度是影响杀藻效果的重要因素,在5mA.cm^-2下,低密度(6×10⁸个/L)水样的光密度值下降明显比高密度(6×10⁹个/L)水样快.水样在反应器中的流量对结果影响不大.

Impact Factors on Algal Inactivation by Electrochemical Oxidation in a Tubular Reactor

The paper studied the impact of algal species,current density,electrode material,cell density and flow rate on the algal inactivation by electrochemical oxidation.The results showed that Microcystis aeruginosa was more sensitive to the electrochemical treatment than Anabaena flos-aquae.The algal species and shape influenced the results of electrochemical oxidation.The ordinary iron tube,titanium tube and copper tube were used as cathodes and it was found that they had little effect on the electrochemical oxidation.But anode materials could influence the inactivation effect.The titanium rod coated with ruthenium oxide was more effective than titanium rod.If the current density was 1 mA·cm^-2,the inactivation effect of electrochemical treatment on the algae cell was little.When it increased to 2.5 mA·cm^-2,it was observed that the algal cells were inactivated.Cell density was another important impact factor on the electrochemical inactivation.The decrease of optical density was sharper for lower cell density sample(6×10⁸ cell/L) than higher cell density sample (6×10⁹ cell/L) at the current density of 5 mA·cm^-2.The flow rate in the tube had little influence on the electrochemical effect.