Impact Factors on Algal Inactivation by Electrochemical Oxidation in a Tubular Reactor
管流电氧化杀藻及其影响要素

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.