Hybrid biofilm wastewater treatment technology: Optimization and microbial analyses

城市废水是进入加拿大地表水的最大体积污染源。因此，加拿大各地的市政当局都被要求满足省级和联邦一级严格的废水排放法规，以减少对环境的影响。BIOSTIR®DUO是威立雅水务技术加拿大公司(威立雅水务)最近开发的一种新型混合附着式生长废水处理技术。该技术结合了移动床生物膜反应器(MBBR)和曝气生物滤池(BAF)技术的独特优势，形成了一个单一的混合系统。与传统的曝气生物滤池技术相比，BioStr®Duo技术有可能增加系统的碳和氮负荷，减少系统的能源消耗，并减少系统的占地面积。这项研究将是世界上首次对MBBR和BAF组合工艺进行污水处理的全面调查。这项研究将在新升级的康沃尔污水处理厂的全尺寸BIOSTIR®DUO示范单元上进行；BIOSTIR®DUO单元与构成该设施二级处理系统的传统BAF单元平行运行。本研究的目的是研究和优化MBBR/BAF组合工艺的碳氨去除动力学和固体去除性能，并对复合生物膜工艺的附着生长微生物特性有一个基本的了解。拟议的研究超越了对新型BioStyr®Duo的动力学测试，并将提供关于季节温度、融雪条件、进水不一致性、流速升高率以及碳和氮负荷对混合系统生物膜和生物量的影响的新知识。这项研究中获得的新知识将指导一种前景看好的新经济技术的优化设计，该技术将通过降低排放到加拿大水域的污水中有害有害物质的水平，最终降低污染物对环境、渔业资源和人类健康的风险。该项目还将帮助培训一个在不久的将来需求量很大的重要领域的HQP。

Municipal wastewaters are the largest volumetric source of pollution entering into Canadian surface waters. As such, municipalities across Canada are required to meet strict wastewater discharge regulations at the provincial and federal level to reduce the impact on the environment. The Biostyr®Duo is a novel hybrid attached growth wastewater treatment technology that has been recently developed by Veolia Water Technologies Canada Inc. (Veolia Water). This technology combines specific advantages of the moving bed biofilm reactor (MBBR) and biological aerated filter (BAF) technologies into a single hybrid system. The Biostyr®Duo technology has the potential to increase the carbon and nitrogen loading of the system, to reduce the energy usage of the system and reduce the land footprint of the system as compared to conventional BAF technologies. This study will be the first full-scale investigation of an MBBR and BAF hybrid technology for wastewater treatment in the world. The study will be performed on a full-scale, Biostyr®Duo, demonstration cell at the newly upgraded Cornwall, ON wastewater treatment plant; with the Biostyr®Duo cell being operated in parallel to conventional BAF cells that comprise the secondary treatment system of the facility. The objective of this research is to investigate and optimize the carbon and ammonia removal kinetics and solids removal performance of the MBBR and BAF hybrid technology and to also develop a fundamental understanding of attached growth microbial characteristics of hybrid biofilm technologies. The proposed research moves beyond kinetic testing of the novel Biostyr®Duo and will present new knowledge regarding the effects of seasonal temperatures, snow melt conditions, influent inconsistencies, velocity rise rate along with carbon and nitrogen loading on biofilm and biomass of the hybrid system. The new knowledge acquired in this study will guide the optimal design of a promising new and economic technology that will ultimately reduce the risk of pollutants to the environment, to fishery resources, and to human health by decreasing the level of harmful deleterious substances discharged from WWTP effluent into Canadian waters. The project will also help to train HQP in an important area that will be in high demand in the near future.