东太湖水源水臭氧氧化过程中溴酸盐控制技术  

Bromate control during ozone oxidation in Dongtaihu Lake source water

作　　者：闫慧敏[1] 唐玉霖[1,2] 于水利[1,2] 李攀[1,2] 黎雷[1,2] 侯立安[1] 漆晴 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092 [3]吴江华衍水务有限公司,江苏苏州215200

出　　处：《供水技术》2015年第1期1-6,共6页Water Technology

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07403-001);国家科技支撑计划课题(2012BAJ25B06);国家自然科学基金项目(21007048)

摘　　要：针对东太湖水中溴离子含量较高，采用臭氧一活性炭工艺很可能会导致出厂水中溴酸盐超标的问题，研究了加氨和高锰酸钾预氧化对东太湖水源水在臭氧氧化中溴酸盐生成的控制作用。结果表明，加氨可以有效抑制溴酸盐的生成，在加氨量低于0．04mmol／L时，随着加氨量的增加，其抑制效果逐渐增强；当加氨量超过0．04mmol／L时，加氨对溴酸盐抑制率不再继续增加。当水中溴离子质量浓度为120—260μg／L，pH值为6．8～8．7，水温为8—40℃时，加氨可以有效抑制水中溴酸盐的生成，且对原水水质影响较小。当高锰酸钾投加量低于6μmol／L时，其对溴酸盐的生成具有一定的抑制作用；高猛酸钾投加量高于6μmol／L时，反而会提高溴酸盐的生成量；同时较高的pH值和水温均不利于高锰酸钾对溴酸盐的控制，反而会增加其生成量。通过比较可知，对于东太湖水源水，加氨控制溴酸盐生成的效果比高锰酸钾更稳定和有效，实际生产中可以选用加氨控制臭氧一活性炭工艺中溴酸盐的生成。With high bromide concentration in water of Dongtaihu Lake, the excessive bromate in finished water may occur adopting ozone-activated carbon treatment process. The control of bromate formation in ozone oxidation was studied by dosing ammonia and potassium permanganate preoxidation in source water of Dongtaihu Lake. The results showed that dosing ammonia could effectively restrain bromate formation, and the inhibition effect was increased gradually with the increase of ammonia concentration when ammonia dosage was less than 0.04 mmol/L. The bromate inhibition rate was not continually increased when ammonia dosage was more than 0.04 mmol/L. Dosing ammonia could inhibit the bromate formation effectively and had little effect on raw water quality when bromide concentration was from 120txg/L to 260p.g/L, pH was from 6.8 to 8.7 and water temperature was from 8 ~C to 40 ~C. When the potassium permanganate dosage was less than 6 p.mol/L, it had certain inhibition for bromate formation, whereas it could increase brmonate formation when the potassium permanganate dosage was more than 6 p.mol/L. The high pH and temperature had negative effects on bromate control by potassium permanganate whereas the bromate formation was increased. According to the comparison, it could be seen that dosing ammonia was more stable and effective than potassium permanganate on bromate inhibition for the source water in Dongtaihu Lake, thus dosing ammonia could be selected to control bromate formation in ozone-activated carbon treatment process in practical operation.

关 键 词：水源水 溴离子 臭氧氧化 溴酸盐 氨 高锰酸钾 

分 类 号：TU991.24[建筑科学—市政工程]