Pilot Scale Nutrient Removal Technology Optimization for Lagoon Wastewater Treatment System Upgrades

加拿大约有1000个正在运行的泻湖废水处理设施正面临越来越大的压力，要超过联邦排放条例，并满足严格的氮、磷和固体废水排放条例。改造或升级这些被动处理设施以实现营养物和固体去除的关键挑战是首先在冬季运行的极低温度下实现这些设施的硝化作用。随着移动床生物膜反应器（MBBR）技术在加拿大泻湖处理设施冬季运行中作为一种经济手段实现硝化，本研究致力于研究MBBR技术与圆盘过滤技术相结合的应用，作为泻湖设施的升级解决方案，以满足严格的氮、磷和固体排放法规。该研究将产生关于在低温下运行的硝化和反硝化生物膜、生物量和微生物组的新的基础知识，因为目前还没有关于在低温下运行的硝化和反硝化MBBR系统的研究，这是加拿大被动处理系统的代表。本研究选择MBBR技术是因为它适合作为泻湖便池的升级技术，并且能够实现低温硝化。此外，该研究将描述MBBR升级系统在泻湖中产生的生物固体，并将优化圆盘过滤技术在泻湖中去除固体的操作。这项研究将在两个泻湖处理设施进行试验。该研究将为有效设计和操作低操作强度、占地面积小、经济升级的MBBR和圆盘过滤处理系统提供必要的新基础知识，以实现加拿大现有泻湖系统的营养物和固体去除。这一研究项目所产生的知识将通过减少加拿大自然水域中有害有害物质的排放，最终减少对环境、渔业资源和人类健康的风险。

The approximately 1000 operating lagoon wastewater treatment facilities in Canada are facing increasing pressure to exceed the federal discharge regulations and to meet stringent nitrogen, phosphorous and solids effluent discharge regulations. The critical challenge of modifying or upgrading these passive treatment facilities to achieve nutrient and solids removal has been to first achieve nitrification in these facilities at the very low temperatures characteristic of winter operation. With the recent demonstration of the moving bed biofilm reactor (MBBR) technology as an economical means to achieve nitrification during winter operation at lagoon treatment facilities in Canada, this research endeavours to investigate the application of the MBBR technology in combination with the discfilter technology as an upgrade solution to lagoon facilities to meet stringent nitrogen, phosphorous and solids discharge regulations. The research will produce new fundamental knowledge with regard to nitrifying and denitrifying biofilm, biomass and microbiomes operating at low temperatures as there are currently no studies on nitrifying and denitrifying MBBR systems operated at low temperatures that are representative of passive treatment systems in Canada. The MBBR technology has been selected for this research due to its suitability as an up-grade technology for lagoon facilitates and its ability to achieve low temperature nitrification. In addition, the research will characterise the biologically produced solids of MBBR upgrade systems to lagoons and will optimize the operation of the discfilter technology for solids removal at lagoons. The study will be performed at the pilot scale with installations at two lagoon treatment facilities. The study will provide new fundamental knowledge necessary to effectively design and operate a low operator intensity, small footprint, economical upgrade MBBR and discfilter treatment train to achieve nutrient and solids removal at current lagoon systems in Canada. The knowledge created from this research project will ultimately reduce the risks to the environment, fisheries resources, and human health by decreasing the discharge of harmful deleterious substances in Canadian natural waters.