Effect of varying environmental conditions on the performance and stability of aerobic granular biomass treating dilute Canadian municipal wastewater

好氧颗粒生物质（AGB）是污水处理和资源化领域的一个较新的发展。AGB是诱导选择自聚集生物质的多种选择压力的结果，其导致直径大于0.2mm的颗粒。因此，AGB能够从处理过的液体流中快速分离（由于颗粒的快速沉降速度），并允许在颗粒内形成多样化的微生物群落，从而提供从废水中同时去除碳、氮和磷污染物的能力。在实践中，这些好处转化为减少运营足迹，显著节省能源和降低资本投资。目前，该技术的实验室规模，中试规模和全面实施利用序批式反应器（SBR）来处理高强度（600至1000 mg/L COD）的合成，市政和工业废水。相比之下，在加拿大环境中看到的废水通常具有较低的浓度（200至300 mg/L COD）。本研究的目标是：1）了解较低强度的加拿大城市污水对AGB系统性能的影响，2）了解加拿大城市污水的进料配置（活塞流与完全混合）的影响，以及3）构建和验证一个概念性的连续流AGB系统。这项研究的结果将是至关重要的规模扩大工作，开发一个AGB系统能够在加拿大的情况下执行。

Aerobic Granular Biomass (AGB) is a relatively new development in the field of wastewater treatment and resource recovery. AGB is a result of a multitude of selective pressures inducing the selection of self-aggregating biomass, which results in granules greater than 0.2 mm in diameter. As a result, AGB is able to be quickly separated from the treated liquid stream (due to the fast settling velocity of the granules), and allows for a diverse microbial community to develop within the granules, thereby providing the ability for simultaneous removal of carbon, nitrogen, and phosphorus pollutants from wastewater. In practice, these benefits translate to a reduced operational footprint, significant energy savings, and lower capital investment. Currently lab-scale, pilot-scale, and full-scale implementations of the technology utilize sequencing batch reactors (SBRs) to treat high strength (600 to 1000 mg/L COD) synthetic, municipal, and industrial wastewater. In contrast, the wastewater seen in a Canadian context, is typically of lower strength (200 to 300 mg/L COD). The proposed objectives of this study are to 1) understand the effect of lower strength Canadian municipal wastewater on AGB system performance, 2) understand the effect of feeding configuration (plug flow vs. completely mixed) with Canadian municipal wastewater, and 3) construct and validate a conceptual continuous flow AGB system. The findings of this study will be vital for scale-up work for developing an AGB system capable of performing in a Canadian context.