Aerobic granular sludge in continuous flow reactor configuration

加拿大的污水处理厂(WWTP)根据联邦和省级法规要求升级为完全去除导致河流和湖泊恶化的有机物和养分。现有的污水处理厂使用长的连续流反应器(CFR)。这类工厂的传统升级将需要大幅增加土地(通常现场几乎没有可用的土地)和资本成本，以及高昂的运营成本，这对市政当局来说可能是不堪重负的。最近在加拿大国外展示的一种新的高效好氧颗粒污泥(AGS)技术，通过需要更少的土地和更低的运行成本，有可能解决这些问题。然而，AGS技术仅作为序批式反应器技术或AGS-SBR提供，这是一个不连续的过程，不适合改造/升级加拿大约90%的市政工厂现有的CFR过程。建议开发一种开创性的好氧颗粒污泥连续流反应器或AGS-CFR，其配置将具有现有连续流系统中颗粒污泥的关键要素。在现有的污水处理厂，将使用一个以未经处理的废水为原料的大型试验系统，以制定设计标准、控制、监测和运行参数，以促进扩大到全面规模。这一突破性的AGS CFR新工艺的要素已经由申请者在小规模上进行了演示。该项目对加拿大市政当局具有战略意义，因为AGS-CFR的应用将允许通过将该过程安装到现有基础设施中并实际降低运营成本来实施全面的养分去除。工业合作伙伴AECOM对在世界各地的设计工作中采用这项技术有着直接的兴趣。温尼伯市公用事业合作伙伴非常感兴趣，因为它面临着高昂的成本和预期的主要工厂常规升级的规模，因此将AGS-CFR技术视为实现更负担得起的资本和运营成本的替代解决方案。

Canada's wastewater treatment plants (WWTP) are mandated by federal and provincial regulations to upgrade to full removal of organics and fertilizing nutrients which lead to deterioration of rivers and lakes. Existing WWTP use long, continuous flow reactors (CFR). A traditional upgrade of such plants would require significant increase of land (often hardly available on site) and capital costs as well as carry large operating costs, which could be overwhelming for a municipality. A new and highly effective technology of aerobic granular sludge (AGS) recently demonstrated outside Canada, has potential to offset these problems by requiring less land and carrying much lower operating costs. The AGS technology is however offered only as a sequencing batch reactor technology or AGS-SBR, which is a discontinuous process and is ill-suited to retrofit/upgrade the CFR process present in some 90% of Canadian municipal plants. It is proposed to develop a ground-breaking aerobic granular sludge continuous flow reactor or AGS-CFR, in a configuration that would feature key elements of granular sludge in an existing continuous flow system. A large pilot scale system fed with raw wastewater at an existing wastewater treatment plant will be used to develop design criteria, control, monitoring and operational parameters which will facilitate scale-up to full scale. The elements of this breakthrough new AGS CFR process have already been demonstrated by the Applicants in small scale. The project is of strategic importance to Canadian municipalities as application of AGS-CFR will allow for implementation of full nutrient removal by fitting the process into existing infrastructure and actually lowering the operating costs. The industrial partner AECOM has an immediate interest in adopting the technology in its design work around the world. The City of Winnipeg utility partner is vitally interested as it has been faced with prohibitive costs and size of anticipated conventional upgrade of its main plant and therefore views the AGS-CFR technology as the alternative solution to arrive at more affordable capital and operating costs.