摘要
为提高出水水质的生物稳定性,明确是否应在生物活性炭(BAC)滤池前设置预氧化工艺,比较了预氧化/生物活性炭联用工艺与常规给水处理工艺中AOC的变化规律及对有机物的去除效果。研究发现,常规给水处理工艺对AOC的去除率仅为31.8%,出厂水中高浓度的AOC造成了管网中细菌的再生长。高锰酸钾预氧化与生物活性炭联用工艺对AOC的去除率为67.7%,AOC浓度降至121μg/L,提高了水质的生物稳定性。臭氧预氧化与生物活性炭联用工艺对AOC的去除率为48.3%,低于单独活性炭工艺的;对有机物的去除效果则低于高锰酸钾预氧化/生物活性炭联用工艺的。可见,在生物活性炭前设置高锰酸钾预氧化单元,更有利于去除水中的有机物及保障水质的生物稳定性。
In order to increase the biostability of drinking water and to confirm the importance of preoxidation before the biological activated carbon （BAC） process, the variation of AOC in conventional water treatment processes and preoxidation/BAC process and the removal of organic matters were compared. The results demonstrate that the removal rate of AOC by conventional treatment processes is only 31.8% and the high AOC value in the finished water leads to the regrowth of bacteria in the distribution system. The removal rate of AOC by permanganate preoxidation/BAC process is 67.7% , the AOC value is reduced to 121 μg/L, and the biostability of water quality is improved. The removal rate of AOC by ozone preoxidation/BAC process is 48.3%, which is lower than that by single BAC process. The permanganate preoxidation/BAC process is superior to ozone preoxidation/BAC process in treating organic matters. It is concluded that permanganate preoxidation in conjunction with BAC is helpful to remove organic matters and ensure the biostability of water quality.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第19期24-26,30,共4页
China Water & Wastewater
基金
国家自然科学基金资助项目(50578051)
