常规/臭氧生物活性炭去除有机物及亚硝胺前体物特性  

Treatability of organics and nitrosamine precursors by the conventional/O3-BAC process

作　　者：廖晓斌[1] 陈超[1] 汪隽[1] 张晓健[1] 

机构地区：[1]清华大学环境学院,北京100084

出　　处：《清华大学学报（自然科学版）》2013年第4期520-525,共6页Journal of Tsinghua University(Science and Technology)

摘　　要：该文考察运行18个月的常规/臭氧-生物活性炭(O3-BAC)组合工艺对中国华东地区某微污染湖泊水的处理特性。结果表明:此时该工艺去除有机物能力有限,但对消毒副产物亚硝胺前体物的去除能力高于其他有机物。工艺出水溶解性有机碳(DOC)质量浓度、UV254和溶解性有机氮(DON)质量浓度的平均值分别为3.12mg/L、0.053cm-1和0.171mg/L,平均去除率分别为34.9%、53.9%和32.7%;对亚硝胺前体物的去除率为72.3%。臭氧和炭池中的微生物在去除亚硝胺前体物中发挥了重要作用。小分子有机物、芳香性蛋白质和微生物代谢产物主要在活性炭单元中去除。因而,要关注长期运行的常规/O3-BAC组合工艺对有机物及其亚硝胺前体物的去除,充分发挥微生物作用。The conventional/ozone biological activated carbon （O3 BAC） process was used to treat micro-organism polluted lake water in Eastern China for 18 months. The results show that the long term operation had limited ability to remove organic compounds, but effectively removed nitrosamine precursors. The dissolved organic carbon （DOC）, UV254 and dissolved organic nitrogen （DON） levels in the effluent were 3.12 mg/L, 0. 053 cm-l and 0. 171 mg/L, with removal rates of 34.9%, 53.9% and 32.7%. The average removal efficiency of the nitrosamine precursors reached 72.3%. The ozone and the bacteria in the BAC significantly improved the removal rates. Micro-molecular organics, aromatic proteins and microbial metabolites were effectively removed by the BAC unit. Therefore, improvements to the BAC process should focus on removal of organics and nitrosamine precursors in long-term operations.

关 键 词：臭氧 生物活性炭 有机物 亚硝胺前体物 饮用水 

分 类 号：X524[环境科学与工程—环境工程]