Aerobic Granulation Membrane Bioreactor (AGMBR): Novel Wastewater Treatment and Reclamation Technology

本项目主要目的是开发新型好氧颗粒化膜生物反应器（AGMBR）用于废水处理和回收。AGMBR系统集成了创新的好氧颗粒化和膜过滤技术，以实现高效和经济的处理和城市和工业废水的回收。AGMBR采用好氧颗粒生物降解水污染物，膜过滤将处理后的废水与好氧颗粒分离。好氧颗粒化是生物技术废水处理工艺的最新创新，它依赖于好氧颗粒的生理能力来分解水和废水中不需要的污染物。该创新的独特之处在于，在顺序间歇式反应器中培养由微生物细胞自聚集而形成的致密好氧颗粒污泥。好氧颗粒具有许多优点：坚固紧凑的结构，优异的沉降能力，高生物质保留率，快速自固定，对冲击负荷的高弹性和对化学毒性的高耐受性，以及污泥生长量低，废水处理单位容量高，反应器体积和空间要求显着减少。使用好氧颗粒化生物技术处理系统可以大大节省城市和工业废水处理的成本，并为环境提供更好的保护。膜生物反应器（MBR）是另一项创新，它将活性污泥过程与膜技术相结合，用于废水处理和回收。MBR具有占地面积小、生物质保存率高、出水质量高等优点。然而，MBR在污染方面有一个主要缺点。MBR中活性污泥在过滤过程中，由于污染降低了膜的渗透性，从而降低了处理后的水通量，造成运行成本高、能耗高、利用困难、操作灵活性降低、膜清洗更换频繁等问题。在AGMBR系统中，絮凝体形成好氧颗粒可以防止膜孔堵塞。好氧颗粒也可以用来将细菌附着在颗粒表面而不是膜表面，这将最终减轻膜生物污染。拟议的项目将是世界上第一个中试规模的AGMBR。新型AGMBR技术将最终为加拿大在环境保护和可持续发展方面的努力做出贡献，并可在全球其他生物废水处理设施中开发和部署。

The main objective of this project is the development of novel aerobic granulation membrane bioreactor (AGMBR) technology for wastewater treatment and reclamation. The AGMBR system integrates innovative aerobic granulation and membrane filtration technologies to achieve efficient and cost-effective treatment and reclamation of municipal and industrial wastewater. An AGMBR employs aerobic granules to biodegrade water pollutants and membrane filtration to separate the treated effluent from aerobic granules. Aerobic granulation is a recent innovation in biotechnological wastewater treatment processes and depends on the physiological capabilities of aerobic granules to break down the undesired pollutants in water and wastewater. The unique feature of the innovation is the cultivation of compact aerobic granular sludge developed from the self-aggregation of microbial cells in sequencing batch reactors. Aerobic granules have a number of advantages: a strong and compact structure, excellent settling ability, high biomass retention, rapid self-immobilization, high resilience to shock loadings and high endurance to chemical toxicity, as well as low sludge growth yield, high unit capacity of wastewater treatment and significant reductions in the reactor volume and space requirements. The use of an aerobic granulation biotechnological treatment system could result in significant cost savings for municipal and industrial wastewater treatment and provide better protection for the environment. Membrane bioreactor (MBR) is another innovation that integrates an activated sludge process with membrane technology for wastewater treatment and reclamation. MBR has many advantages: small footprint, high biomass retention, high effluent quality. However, MBR suffers a major drawback in fouling. During filtration of the activated sludge in MBR, fouling decreases the membrane permeability and thus treated water flux, which results in higher operational costs, higher energy consumption, difficulties in utilization, reduced operational flexibility, and frequent cleaning and replacement of membrane. In the AGMBR system, aerobic granules formation from flocs may prevent pore clogging of the membrane. Aerobic granules can also be used to attach the bacteria to granular surfaces rather than the membrane surface, which will eventually alleviate membrane biofouling. The proposed project will be the first pilot-scale AGMBR worldwide. The novel AGMBR technology will ultimately contribute to Canada’s efforts in environmental protection and sustainable development and can be exploited and deployed in other biological wastewater treatment facilities worldwide.