NDMA在污水生物处理和污泥厌氧消化过程中的环境行为及影响研究

N-nitrosodimethylamine(NDMA) is type of high potential mutagenic and carcinogenic N-Nitrosamines occurred in drinking water treatment plants or wastewater treatment plants as a disinfection by-product in recent years and has more attention because of the toxicity in drinking water.NDMA is also widespread in the sewage treatment systems, however it hasn't been much attention on account of the low concentration. Therefore, the effect on activated sludge treatment system and Subsequent sludge anaerobic digestion system of NMDA is not reported so far, as well the migrationzand transformation rule of NDMA during the treatment processes. This project intends to carry out three aspects of work. Firstly, conduct a quantitative study to analyze the effect of NDMA on wastewater nitrogen and phosphorus removal in wastewater and anaerobic digestion of activated sludge. Secondly, carry out the mechanism research of the influence of NDMA during the processes to definite the effect on the activity and composition of microorganism population, and to explore the reaction and adaptation of microbial to the stimulation from NDMA. Finally, to trace and summarize the function, transformation and changing rules of NDMA in the process, such as aerobic condition(activated sludge), anaerobic condition(activated sludge anaerobic digestion). With the research efforts on those, a further understanding could be realized, which would make contributions for and enrich the existing theory of the toxic and harmful substance in biological nitrogen removal and activated sludge anaerobic digestion and provide fundamental knowledge in order to reduce the influence and establish an effective control method of NDMA.

N-亚硝基二甲胺（NDMA）是饮用水和污水处理消毒过程中一种副产物，由于其极强的"三致"毒性，在饮用水方面已受到广泛关注。有证据表明NDMA在污水处理系统进水中也普遍存在，但由于其较低的浓度，其强烈毒性对活性污泥处理系统和后续污泥厌氧消化系统的影响，以及其本身在上述过程中的迁移转化规律，尚未引起足够关注，目前也未见系统研究报道。本课题拟开展以下三方面工作：（1）定量研究NDMA对污水脱氮除磷和污泥厌氧消化的影响，确定其影响规律及定量表达；（2）追踪并研究NDMA在污水生物处理过程中的迁移转化和变化（降解）规律，包括好氧系统（活性污泥）和厌氧系统（污泥厌氧消化）中；（3）系统研究NDMA在上述过程中的作用机理，明晰其对微生物系统活性及种群变化的影响，探寻微生物系统对NDMA的应急反应和适应性；进而为含NDMA废水在活性污泥系统（包括厌氧消化）中的有效控制打下一定理论基础。

N-亚硝基二甲胺（NDMA）是饮用水和污水处理消毒过程中一种副产物，由于其极强的"三致"毒性，在饮用水方面已受到广泛关注。有证据表明NDMA在污水处理系统进水中也普遍存在，但由于其较低的浓度，其强烈毒性对活性污泥处理系统和后续污泥厌氧消化系统的影响，以及其本身在上述过程中的迁移转化规律，尚未引起足够关注，目前也未见系统研究报道。本课题拟开展以下三方面工作：（1）定量研究NDMA对污水脱氮除磷和污泥厌氧消化的影响，确定其影响规律及定量表达；（2）追踪并研究NDMA在污水生物处理过程中的迁移转化和变化（降解）规律，包括好氧系统（活性污泥）和厌氧系统（污泥厌氧消化）中；（3）系统研究NDMA在上述过程中的作用机理，明晰其对微生物系统活性及种群变化的影响，探寻微生物系统对NDMA的应急反应和适应性；进而为含NDMA废水在活性污泥系统（包括厌氧消化）中的有效控制打下一定理论基础。