Evaluation of cold-weather wastewater nitrification technology for removal of polar chemicals of emerging concern from rural wastewaters

我们正在评估一种新型废水抛光机-水下附着式生长反应器(SAGR)-如何**去除药品、个人护理产品和**杀虫剂等新兴关注的极性化学品(CECs)。SAGR是Nexom开发的一项技术，旨在利用泻湖废水处理技术改善小**社区的废水处理。泻湖通常对营养物质(氮和磷)、悬浮固体、生化需求、大肠菌群和其他**传统废水污染物提供有限的去除。鉴于日益严格的废水标准，开发有效但经济且易于使用的处理技术势在必行。SAGR由**完全充气的砂砾垫层组成，该垫层是绝缘的。这促进了有益的硝化细菌的生长，这些细菌**在任何天气条件下都能去除氨，特别是冬季的寒冷温度限制了细菌的**生长，从而限制了处理效率。在之前的测试中，SAGR已被证明在将传统废水污染物去除到低于当前加拿大标准的水平方面非常有效。细菌种群也可能移除极性CEC，这也可能对人类和生态系统健康造成危害，并开始在其他司法管辖区受到监管。我们与Nexom的合作将评估**SAGR在马尼托巴省第一民族社区的两个示范设施中消除极地CEC的情况。这项工作将有助于改善生活在污水处理基础设施有限的农村社区的许多加拿大人的水质。

We are evaluating how a novel wastewater polisher, the Submerged Attached Growth Reactor (SAGR), can**remove polar chemicals of emerging concern (CECs) such as pharmaceuticals, personal care products, and**pesticides. SAGR is a technology developed by Nexom for improving wastewater treatment in small**communities using lagoon wastewater treatment technology. Lagoons often provide limited removal of**nutrients (nitrogen and phosphorus), suspended solids, biochemical demand, coliform bacteria, and other**traditional wastewater contaminants. Given increasingly more stringent wastewater standards, it is imperative**that effective but economical and easy-to-use treatment technologies be developed. SAGR consists of a**fully-aerated course gravel bed that is insulated. This promotes the growth of beneficial nitrifying bacteria that**remove ammonia under all weather conditions, especially cold temperatures in winter that limit bacterial**growth and therefore treatment efficiency. In previous tests, SAGR has been shown to be extremely effective**at removing traditional wastewater contaminants to levels below current Canadian standards. The bacterial**populations are also likely to remove polar CECs as well, which can also be a hazard to human and ecosystem**health and are beginning to be regulated in other jurisdictions. Our collaboration with Nexom will evaluate**SAGR at eliminating polar CECs at two model installations in Manitoba First Nations communities. This**work will help to improve water quality for the many Canadians living in rural communities with limited**infrastructure for wastewater treatment.