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本研究以南方某含溴水源为原水,利用饮用水常规工艺及臭氧-活性炭深度处理中试连续实验,评价臭氧氧化过程中溴酸盐生成情况,并考察了氨氮、过氧化氢(H_2O_2)对溴酸盐控制效果及对三卤甲烷生成势(THMFP)的去除影响.结果表明,在不同水质条件下,臭氧消耗量为1.0 mg·L~(-1)以上时,溴酸盐的生成量超过标准(10.00μg·L~(-1)).利用氨氮和H_2O_2投加均能有效控制溴酸盐生成量,且随投加量增大,溴酸盐生成量逐渐降低,氨氮投加0.10~0.30 mg·L~(-1)或m(H_2O_2)/m(O3)(质量比)为0.2~1.0时,能够将溴酸盐控制在标准以内.当氨氮-H_2O_2联合控制溴酸盐时,溴酸盐生成量随m(H_2O_2)/m(O3)先升高后降低.在利用氨氮和H_2O_2投加进行溴酸盐控制过程中,氨氮对THMFP的去除效率影响并不显著,而投加H_2O_2使得THMFP去除效能有所降低.
In this study, a brominated water source was used as raw water in the south of China. Potassium permanganate (O 2) was used to evaluate the formation of bromate in the ozone oxidation process by using the conventional drinking water process and the ozone-activated carbon deep-treatment pilot experiment. The effects of ammonia nitrogen and hydrogen peroxide Bromate control and the removal of THMFP were studied.The results showed that under different water quality conditions, when the ozone consumption was above 1.0 mg · L -1, the formation of bromate Exceeding the standard (10.00 μg · L -1). The formation of bromate can be effectively controlled by the addition of ammonia nitrogen and H 2 O 2, and the formation of bromate gradually decreases with the increase of dosage, Bromite can be controlled within the standard when the concentration is -0.30 mg · L -1 or m (H 2 O 2) / m (O 3) (mass ratio) is 0.2 to 1.0. When ammonia-H 2 O 2 is combined with bromate , And the amount of bromate produced first increased and then decreased with the increase of m (H 2 O 2) / m (O 3) .In the course of bromate control using ammonia nitrogen and H 2 O 2 addition, the removal of THMFP by ammonia nitrogen was not significant, Add H_2O_2 to reduce the removal efficiency of THMFP.