Development of anammox and anoxic-aerobic granular biomass for advanced wastewater treatment at low temperatures

开发用于低温高级废水处理的厌氧氨氧化和缺氧-好氧颗粒生物质

• 批准号: RGPIN-2017-05501
• 负责人: Oleszkiewicz, Jan
• 金额: $ 3.72万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=711675
• 关键词: Development; anammox; anoxic; aerobic; granular

Wastewater treatment plants in Canada are under regulatory pressure to upgrade to nitrogen and phosphorus removal with minimized capital cost and within existing infrastructure. There is additional stress to lower operational costs by achieving energy independence and decreasing carbon footprint. Two new processes that can facilitate these goals are subject of the proposed research: main stream partial nitrification/anammox (PN/A) and anoxic-aerobic granular sludge (AGS). Application of the PN/A process to treat municipal sewage, which has low temperature and low ammonia concentration with large dilute spring flows, is proposed. The process is particularly applicable to plants with anaerobic sludge digesters where sludge dewatering sidestream (high temperature, high ammonia, low flow) is already treated in a well-established PN/A process, such as in Guelph ON or planned Winnipeg North plant. Early full scale mainstream PN/A process experiments in EU confirmed potential of the process for significant energy and chemical savings but revealed significant unsolved problems with consistent granulation and process stability. This research (2 PhD and 2 BSc students) will focus on improvement of granular PN/A biomass and biofilm formation in low temperature and ammonia environments to tailor the process to conditions of municipal wastewater treatment, and will take place at the Winnipeg North plant, where high concentration warm sidestream is generated along with municipal wastewater. Biodiversity will be compared between the granules and biofilm in hybrid systems with attached and suspended biomasses leading to criteria for process optimization under variable conditions. Bio-augmentation from side- to main-stream PN/A will be quantified. The AGS process developed in EU is used in a proprietary sequencing batch reactor mode, treating mainstream at some 40% reduction of capital costs, land requirements and energy use. Being proprietary, there are no design guidelines available to Canadian consultants amidst reports of prolonged start-up problems and degranulation in existing installations. The AGS process has never been used in continuous flow. As Canadian plants are mostly continuous flow the research aims to develop a continuous flow AGS process. Two PhD and 3 BSc students will focus on beneficial stressors inducing granulation in continuous mode as well as developing standard procedures for biofilm formation potential and biofilm strength. Further, standard design parameters will be evaluated and communicated to stakeholders in order to encourage the proliferation of AGS in N. America. The work will be conducted at the Winnipeg West plant and the planned Aerobic Granular Sludge Facility at Rock River IL plant. Engineering consultants and municipalities are eagerly waiting for results which should facilitate the use of these two paradigm-changing technologies in Canada.

加拿大的废水处理厂面临着监管压力，需要在现有基础设施内以最小化的资本成本升级至脱氮除磷。通过实现能源独立和减少碳足迹来降低运营成本还面临着额外的压力。可以促进这些目标的两种新工艺是拟议研究的主题：主流部分硝化/厌氧氨氧化（PN/A）和缺氧-好氧颗粒污泥（AGS）。 提出应用PN/A工艺处理低温、氨浓度低、稀泉水流量大的城市污水。该工艺特别适用于配备厌氧污泥消化器的工厂，其中污泥脱水侧流（高温、高氨、低流量）已在完善的 PN/A 工艺中得到处理，例如圭尔夫 ON 或计划中的温尼伯北工厂。欧盟早期的全规模主流 PN/A 工艺实验证实了该工艺在显着节省能源和化学品方面的潜力，但也揭示了在一致的造粒和工艺稳定性方面尚未解决的重大问题。 这项研究（2 名博士生和 2 名理学士学生）将重点关注在低温和氨环境下改善粒状 PN/A 生物质和生物膜的形成，以根据城市废水处理条件调整工艺，并将在温尼伯北工厂进行，其中与城市废水一起产生高浓度的温暖侧流。将比较具有附着和悬浮生物质的混合系统中的颗粒和生物膜之间的生物多样性，从而得出可变条件下工艺优化的标准。从侧向到主流 PN/A 的生物增强将被量化。 欧盟开发的 AGS 工艺采用专有的序批式反应器模式，处理主流可减少约 40% 的资本成本、土地需求和能源使用。由于是专有的，在现有装置中长期启动问题和脱颗粒的报告中，加拿大顾问没有可用的设计指南。 AGS 工艺从未用于连续流。由于加拿大工厂大多采用连续流工艺，因此该研究旨在开发连续流 AGS 工艺。两名博士生和三名理学士学生将重点研究在连续模式下诱导颗粒化的有益压力源，以及开发生物膜形成潜力和生物膜强度的标准程序。此外，标准设计参数将被评估并传达给利益相关者，以鼓励 AGS 在北美的扩散。这项工作将在温尼伯西工厂和计划在伊利诺伊州罗克河工厂建设的好氧颗粒污泥设施进行。 工程顾问和市政当局正在热切等待结果，以促进这两种改变范式的技术在加拿大的使用。