臭氧/高锰酸盐控制臭氧氧化副产物

Combined Ozone/Permanganate Oxidation for Controlling Byproduct of Ozonation

臭氧氧化过程中产生的一些副产物[如生物可同化有机碳(AOC)、溴酸盐和甲醛等]会影响供水水质安全性。采用臭氧/高锰酸盐复合氧化可在不同程度上提高对AOC的去除率,其合理的投量配比为高锰酸盐0.5mg/L+臭氧1.0mg/L,在该条件下两者的物质的量之比约为1∶8,对AOC的去除率可以提高20%～30%。复合氧化减少了溴酸盐的生成,在不同的臭氧投量情况下都可以取得20%左右的降幅。甲醛是一种典型的臭氧氧化副产物,单纯臭氧氧化后会导致甲醛浓度升高,而投加高锰酸盐可以降低这种趋势,即复合氧化可以有效地减少甲醛的生成。

Some byproducts produced in ozonation process such as biologically assimilable organic carbon (AOC), bromate and formaldehyde, etc . will affect the safety of drinking water. Combined ozone/permanganate oxidation can enhance the removal rate of AOC, which can be increased by 20%-30% at dosage of permanganate 0.5 mg/L and ozone 1.0 mg/L, with a mass ratio of 1 ∶[KG-*3]8 . The combined oxidation can reduce the formation of bromate with a reduction percentage of 20% at different dosage of ozone. Formaldehyde is a typical ozonation byproduct and will rise in concentration after single ozonation; while dosing of permanganate can alleviate its rising, that is, the combined oxidation can reduce the formation of formaldehyde.