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针对于中国北方某地表水源水藻类季节性爆发情况,采用臭氧强化混凝工艺去除藻毒素,实验分别考察了单独投加臭氧及聚合氯化铝(PAC)对微囊藻毒素及浊度、UV_(254)、TOC和高锰酸盐指数的去除效果,研究表明臭氧对MC-LR有较好的去除效果,2 mg/L臭氧对MC-LR的去除率达到了65.74%,对浊度及UV_(254)的去除率达到了29.43%与40.49%,但对TOC及高锰酸盐指数的去除效率却较低,去除率分别为11.59%与9.97%。20 mg/L PAC在单独使用时对MC-LR去除率为15.61%,对浊度、高锰酸盐指数、UV_(254)、TOC的去除率分别为79.21%、58.04%、31.29%与30.12%。在此基础上,采用臭氧-PAC联合工艺,结果表明当2 mg/L臭氧与20 mg/L PAC联用时,对MC-LR的去除率达到了89.87%,对浊度、UV_(254)、TOC及高锰酸盐指数的去除率分别为80.53%、58.75%,34.23%与61.96%。采用臭氧强化混凝联合工艺可以有效地去除该地表水藻类季节性爆发所引起的藻毒素。
Aiming at the seasonal outbreak of surface algae in north China, ozone-enhanced coagulation process was used to remove algal toxins. The effects of ozone and PAC alone on the microcystin and turbidity, (254), TOC and permanganate index. The results show that ozone has a good effect on the removal of MC-LR. The removal rate of MC-LR by 2 mg / L ozone reaches 65.74% The UV_ (254) removal rate reached 29.43% and 40.49%, but the removal efficiency of TOC and permanganate index was lower, the removal rates were 11.59% and 9.97% respectively. The removal rate of MC-LR of 20 mg / L PAC when used alone was 15.61%, and the removal rates of turbidity, permanganate index, UV 254 and TOC were 79.21%, 58.04%, 31.29% and 30.12 respectively %. On this basis, ozone-PAC combined process, the results show that when 2 mg / L ozone and 20 mg / L PAC combined, the removal rate of MC-LR reached 89.87%, turbidity, UV 254, TOC and permanganate index removal rates were 80.53%, 58.75%, 34.23% and 61.96% respectively. The combination of ozone enhanced coagulation process can effectively remove the seasonal algae caused by surface water algae toxins.