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以含溴黄河水为水源,利用中试连续实验,评价臭氧-生物活性炭(O3-BAC)深度处理工艺对COD_(Mn)及嗅味的去除效果,重点研究了臭氧氧化过程中溴酸盐、甲醛等副产物的生成与控制效果。研究发现,O3-BAC工艺能有效降低COD_(Mn)和嗅阈值(TON),在不同水质条件下,臭氧量为2.0 mg/L时溴酸盐的生成量存在超标风险(10μg/L),且导致甲醛大量生成,为29.07μg/L。投加过氧化氢能够有效控制溴酸盐,当氧消耗量为3.0 mg/L以下时,H_2O_2为2.0~3.0 mg/L能将溴酸盐控制在标准内,投加H_2O_2对甲醛生成产生一定影响,随着H_2O_2投加量增加,甲醛生成量先增加后又有所降低。
Using brominated yellow river water as the water source, the effects of ozone-biological activated carbon (O3-BAC) treatment process on the removal of COD Mn and odor were evaluated using pilot-scale continuous experiments. The effects of bromate, Formaldehyde and other byproducts generation and control effect. The results showed that O3-BAC could effectively reduce COD Mn and TON. Under the different water quality conditions, the generation of bromate exceeded the standard risk (10 μg / L) when the ozone concentration was 2.0 mg / L, And led to a large number of formaldehyde, 29.07μg / L. Adding hydrogen peroxide can effectively control bromate. When the oxygen consumption is below 3.0 mg / L, the bromate can be controlled within 2.0-3.0 mg / L H 2 O 2, and H 2 O 2 is added to generate formaldehyde With the increase of H 2 O 2 dosage, the yield of formaldehyde first increased and then decreased.