Development of an innovative multi-zone treatment system for nitrogen-rich wastewaters using anammox process

拟议的项目旨在通过一种节能和经济的方法从工业和农业废水沃茨中去除氮，这是地表水沃茨和地下水的一种重要污染物，与现有技术相比，该方法使用的氧气减少了50%，产生的污泥和温室气体也大大减少。拟议的处理系统采用多区技术，称为BioCAST，沿着一系列特殊的好氧-厌氧过程，称为部分硝化-厌氧氨氧化，以去除氮，而不需要有机碳。在好氧条件下氨的部分硝化（PN）产生亚硝酸盐，亚硝酸盐用于随后的厌氧氨氧化工艺，以在厌氧条件下去除剩余的氨。尽管部分硝化-厌氧氨氧化工艺具有可持续性和经济优势，但由于这些工艺中涉及的细菌生长速率非常低，这对传统技术的应用构成了挑战，因此其发展已经放缓。因此，近年来大量的努力集中在开发处理系统上，该处理系统通过在生物膜反应器中使用固定化微生物或增加悬浮或颗粒状细菌的保留来提供部分硝化-厌氧氨氧化工艺的稳定和延长的操作。BioCAST技术得益于特殊的设计和操作策略，可保持高浓度的悬浮和固定微生物，并可在部分氧化和缺氧条件下进行处理。本项目的主要目的是开发一种技术，用于PN-厌氧氨氧化工艺脱氮的最佳操作条件。将展示所开发的系统用于厌氧消化过程的废水处理的性能。研究工作，以满足本项目的目标将集中在技术开发和性能评估的实验室规模的处理系统在康考迪亚大学的环境工程实验室。Concordia研究团队和公司有能力领导该项目，并开发工业应用技术。

The proposed project addresses the removal of nitrogen, an important pollutant of surface waters and groundwater, from industrial and agricultural wastewaters by an energy-efficient and economical method that uses 50% less oxygen and produces considerably less sludge and greenhouse gases compared to the existing technologies. The proposed treatment system uses a multi-zone technology, called BioCAST, along with a special series of aerobic-anaerobic processes known as partial nitrification-anammox to remove nitrogen without the need for organic carbon. The partial nitrification (PN) of ammonia under aerobic condition produces nitrite that is used in the subsequent anammox process to remove the remaining ammonia under anaerobic condition. Despite the sustainability and economical advantages of partial nitrification-anammox processes, their development has been slowed down because of the very low growth rate of bacteria involved in these processes that poses a challenge to the application of conventional technologies. Accordingly, a great amount of effort has been focused in recent years on the development of treatment systems that offer stable and prolonged operation of partial nitrification-anammox processes by using immobilized microorganisms in biofilm reactors, or increasing the retention of suspended or granulated bacteria. BioCAST technology benefits from a special design and operation strategy that retains a high concentration of both suspended and immobilized microorganisms, and enables treatment under partial oxidation and anoxic conditions. The main objective of this project is to develop a technology for the optimum operating conditions for nitrogen removal by the PN-anammox processes. The performance of the developed system for the treatment of effluents of anaerobic digestion processes will be demonstrated. The research work to meet the objectives of this project will focus on technology development and performance evaluation of a laboratory-scale treatment system at the Environmental Engineering laboratories of Concordia University. The Concordia research team and the Company have the capacity to lead this project and to develop the technology for industrial applications.