SGER: ROLE OF ANAEROBIC DIGESTION IN N-NITROSODIMETHYLAMINE (NDMA) FORMATION IN MUNICIPAL WASTEWATER TREATMENT PLANTS: SOURCE OR SINK

0610358巴夫洛斯他斯该提案提出了厌氧消化器产生或降解NDMA和NDMA前体的潜力。 N-亚硝胺，尤其是N-亚硝基二甲胺（NDMA）和N-亚硝基二乙胺（NDEA），是极强的致癌物，其致癌效力远高于三卤甲烷，例如，并且被列入2003年CERCLA危险物质优先清单（U.S. EPA，2003）。 虽然亚硝胺在火箭燃料、聚合物和橡胶生产等方面的工业应用已大大减少，但亚硝胺作为许多食品、化妆品、药品和农药产品以及烟草烟雾中的副产品或杂质，仍然是常见的环境污染物（卫生和公众健康调查，2002年）。近年来的研究表明，亚硝胺，特别是NDMA，可以通过氯基消毒过程在水处理系统中产生（特别是氯胺化），使其成为一个重要的潜在危险消毒副产物（DBPs）的新兴群体该提案的优势包括，PI已经确定了废水处理厂运行的一个未探索的方面，该方面可能会对NDMA的贡献产生重大影响，天然沃茨。 该研究评估了NDMA前体的潜在形成或去除。该研究还包括在市政处理厂厌氧生物反应器中对前体进行现场测试，在实验室规模的生物反应器中进行测试，以及在厌氧生物反应器中普遍存在的条件下NDMA及其前体的生物转化潜力。 NDMA和N-亚硝基胺对健康和生态构成严重威胁。如果NDMA在厌氧消化器中形成，并且这些影响废水流出物流，则开发/发明减少其形成的方法将是有价值的。

0610358PavlostathisThis proposal proposes the potential of anaerobic digesters to produce or degrade NDMA and NDMA precursors. N-nitrosamines, especially N-nitrosodimethylamine (NDMA) and N-nitrosodiethylamine (NDEA), are extremely potent carcinogens with cancer potencies much higher than those of trihalomethanes, for example, and are listed on the 2003 CERCLA Priority List of Hazardous Substances (U.S. EPA, 2003). Although industrial applications of nitrosamines in rocket fuel, polymer and rubber production, etc. have largely been curtailed, nitrosamines continue to be common environmental pollutants as side-products or impurities in many food, cosmetic, pharmaceutical and pesticide products, and in tobacco smoke (DHHS, 2002). Research in recent years has shown that nitrosamines, particularly NDMA, can be generated in water treatment systems by chlorine-based disinfection processes (particularly chloramination), making them an important emerging group of potentially hazardous disinfection byproducts (DBPs).Strengths of this proposal includes the fact that the PIs have identified an unexplored facet of Waste Water Treatment Plant operation that could significantly impact NDMA contributions to natural waters. The research assesses potential formation or removal of NDMA precursors. The research also includes field-testing for precursors at municipal treatment plant anaerobic digestors, testing in laboratory-scale digestors, and biotransformation potential of NDMA and its precursors under conditions prevalent in an anaerobic digestor. NDMA and N-nitrosoamines pose sever health and ecological risks. If NDMA is formed in anaerobic digesters, and these impact Waste Water effluent streams, then it would be valuable to develop/invent methods to decrease their formation.