N2O2与UV-C灭藻的协同效果研究及工程实验

研究了UV-C/N₂O₂催化氧化去除鱼腥藻PCC7120的效果,探讨了各种因素如c(N₂O₂),pH,辐照度及反应时间对灭藻率的影响.结果表明,N₂O₂对UV-C(紫外线C波段辐照)灭藻具有协同作用,UV-C/N₂O₂高级氧化体系对鱼腥藻PCC7120具有很强的氧化能力.在藻液中c(N₂O₂)为1 mmol/L,反应温度为25℃,pH为6.8,紫外线辐照度0.54 mW/cm2及反应20min的条件下,受试藻种的灭活率5 d后可以达到85%以上.将N₂O₂与浸没式UV-C流动除藻装置结合进行流动式的灭藻实验,灭藻效果显著,鱼腥藻PCC7120体内的SOD酶和POD酶的活性及C-PC藻蓝蛋白、叶绿素a的含量都有大幅度的下降,且灭活后的蓝藻不会重新生长. 

Engineering Experiment and Investigation of Effect on Degradation of Cyanobacteria by the Combination of UV-C and N2O2

The degradation effect of cyanobacteria by the combination of UV-C and N₂O₂ was studied.Anabaena sp.PCC7120 was chosen for experiment.The likely influencing factors,such as N₂O₂ dosage,pH,UV light intensities,and the reaction time on the degradation of Anabaena sp.PCC7120 were investigated.The result showed that UV-C and N₂O₂ have intensive oxidation ability to Anabaena sp.PCC7120.After 5 days,the elimination rate of Anabaena sp.PCC7120 was to reach 85% under the experimental conditions of N₂O₂ dosage 1(mmol/L,) reaction temperature(25 ℃,) pH 6.8,UV light intensity 0.54(mW/cm2) and reaction time 20 minutes.UV-C technology and N₂O₂ were combined and used to an analog experiment for degradation of cyanobacteria in the condition of flowing.The degradation of cyanobacteria is obvious.The activity of SOD and POD in Anabaena sp.PCC7120 decreased greatly,and C-PC and Chl a were almost be degraded.