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

在加拿大，大约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，以超过联邦排放法规，并满足严格的氮、磷和固体流出物排放法规。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非常低的温度下实现这些设施中的硝化。随着最近的示范移动床生物膜反应器（MBBR）技术作为一种经济的手段，以实现在加拿大泻湖处理设施在冬季运行硝化，本研究致力于调查MBBR技术的应用与盘式过滤器技术相结合，作为一种升级解决方案，泻湖设施，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，生物质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，这些系统是加拿大被动处理系统的代表。MBBR工艺由于其适合作为氧化塘设施的升级技术，并具有实现低温硝化的能力，因此被选择用于本研究。此外，该研究还将把MBBR升级系统的生物产生的固体物质转移到泻湖中，并将优化用于泻湖固体去除的盘式过滤器技术的操作。该研究将在两个泻湖处理设施中进行中试规模的安装。该研究将提供必要的新的基础知识，有效地设计和操作低操作员强度，占地面积小，经济的升级MBBR和盘式过滤器处理列车，以实现在加拿大目前的泻湖系统的营养物和固体去除。通过减少加拿大自然沃茨中有害物质的排放，从该研究项目中获得的知识将最终减少对环境、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.