Impacts of Hydrodynamics and Environmental Parameters on a Novel In-situ Bioreactor Performance in Cold Regions

我们的工业合作伙伴开发了一种新型的就地生物反应器，已在美国和加拿大的40多个废水泻湖中显示出高处理效率。在这项跨学科的研究中，我们将研究其高效背后的流体和生物动力学机制，并进一步优化新型生物反应器的设计和操作。特别是，我们将针对广泛的学术和工程界解决以下关键的科学问题(知识差距)。(1)城市污水塘中原位生物反应器的水力和生物动力学；(2)流体动力学和环境参数(如低温、有机负荷)对生物反应器微生物和性能的影响；(3)水力和生物动力学模型的集成耦合，以了解和优化生物反应器的设计和运行；(4)非传统柱式流动条件下污泥颗粒化的潜力和机理。这项研究不仅产生了新的知识，而且在管理废水泻湖方面直接使市政当局和工业受益，因此对加拿大意义重大。新技术可以显著改善对泻湖污泥的消化，从而恢复历史上失去的泻湖空间/容量，以满足未来人口增长和社会经济发展，并提高污水处理效率，从而更好地保护下游受纳水体的环境和生态系统。

Our industrial partner has developed a novel, in-situ bioreactor that has shown high treatment efficacy in 40+ wastewater lagoons in US and Canada. In this interdisciplinary research, we will examine the hydro- and bio-dynamic mechanisms underlying its high efficacy and further optimize the design and operation of the novel bioreactor. In particular, we will target addressing the following key scientific questions (knowledge gaps) for the broad academic and engineering community. (1) Hydro- and bio-dynamics for in-situ bioreactor in municipal wastewater lagoons; (2) Impacts of hydrodynamics and environmental parameters (e.g., low temperature, organic loading) to bioreactor's microorganism and performance; (3) Integrated coupling of hydro- and bio-dynamic models to understand and optimize bioreactor design and operation; (4) The potential and mechanism of sludge granulation in non traditional-column-type of flow conditions. This research is significant to Canada not only by generating new knowledge but also by directly benefiting municipalities and industries in managing wastewater lagoons. The new technology can significantly improve the digestion of lagoon sludge and thus restore historically lost lagoon space/capacity for future population growth and social-economic development, and increase wastewater treatment efficacy and thus better protect the environment and ecosystem of the receiving water bodies downstream.