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

使用厌氧氨氧化工艺开发创新的富氮废水多区处理系统

• 批准号: 453358-2013
• 负责人: Mulligan, Catherine
• 金额: $ 1.74万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=555027
• 关键词: Development; innovative; multi; zone; treatment

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.

拟议项目旨在通过一种节能且经济的方法从工业和农业废水中去除氮（地表水和地下水的重要污染物），与现有技术相比，该方法可减少 50% 的氧气用量，并产生显着减少的污泥和温室气体。拟议的处理系统采用称为 BioCAST 的多区技术，以及称为部分硝化-厌氧氨氧化的一系列特殊需氧-厌氧过程，无需有机碳即可去除氮。氨在有氧条件下部分硝化（PN）产生亚硝酸盐，用于后续的厌氧氨氧化过程中，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率非常低，这对传统技术的应用提出了挑战，因此其发展速度已经放缓。因此，近年来，大量的努力集中在开发处理系统上，通过在生物膜反应器中使用固定化微生物，或增加悬浮或颗粒细菌的保留，提供部分硝化-厌氧氨氧化过程的稳定和长期运行。 BioCAST 技术受益于特殊的设计和操作策略，可保留高浓度的悬浮和固定微生物，并能够在部分氧化和缺氧条件下进行处理。该项目的主要目标是开发一种技术，以实现 PN-厌氧氨氧化工艺脱氮的最佳操作条件。将展示所开发的厌氧消化过程废水处理系统的性能。实现该项目目标的研究工作将集中于康考迪亚大学环境工程实验室实验室规模处理系统的技术开发和性能评估。 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。