GOALI: Balancing flocs and granules for activated sludge process intensification: Stoke's vs Fick's Laws

目标：平衡絮凝物和颗粒以强化活性污泥工艺：斯托克定律与菲克定律

• 批准号: 1512667
• 负责人: Belinda Sturm
• 金额: $ 33.01万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1512667&HistoricalAwards=false
• 关键词: GOALI; Balancing; flocs; granules; activated

1512667SturmMunicipal wastewater treatment plants are under increasing pressure to meet low discharge limits for nitrogen and phosphorus, while aging infrastructure and changing precipitation patterns causes a wet weather burden. A new process, referred to as granular sludge applications, offers a solution to these challenges since slow-growing microbial populations capable of nutrient removal are maintained in dense particles that can be retained under high loading and flow conditions. In the proposed research, settling of the particles will be determined for an optimum granule diameter and density will be investigated and criteria to select for desired particles will be developed.To date, granular sludge units have been pioneered in Europe using column-type sequencing batch reactors that utilize a fast settling time and continuous washout of biomass in order to maintain granular sludge, typically resulting in high effluent suspended solids. This reactor geometry and dependence on internal settling selection limits the adoption of granular technology by existing wastewater treatment plants, which have a tremendous infrastructure already built that should be utilized as plants expand. This proposal is framing sludge particle formation and selection in terms of balancing Fick?s and Stoke?s Law. The PIs hypothesize that low-strength municipal wastewater can supply a minimum organic surface loading of readily-biodegradable substrate required for extracellular polymeric substances and granule formation, as well as the selection of phosphorus accumulating organisms, when a fermentation pretreatment is performed. While current research on granular formation focuses on selecting granular sludge and out-selecting flocs, the PIs hypothesize that: 1) balancing the two sludge structures will provide the maximum reactor performance, and 2) the application of external settling selectors to preferentially retain good settling biomass and PAOs will alleviate the high effluent suspended solids burden typical of column-type granular reactors, and stabilize biological phosphorus removal. The research has the potential to transform the US water sector by developing approaches for granular sludge within existing infrastructure. The proposed project will center on promoting industry-utility-university partnerships to the wastewater profession. DC Water and Hampton Roads Sanitation District have been early adopters of granular sludge technology within the United States, having performed anammox granule pilot research for the past five years at their wastewater treatment plants. The Co-PIs will develop a Water Environment Federation workshop that promotes utility-university partnerships, highlighting how these hasten new technology adoption.

1512667斯特姆市政污水处理厂正面临越来越大的压力，以满足氮和磷的低排放限制，而老化的基础设施和不断变化的降水模式导致潮湿的天气负担。一种称为颗粒污泥应用的新工艺为这些挑战提供了解决方案，因为能够去除营养物的缓慢生长的微生物种群保持在致密颗粒中，可以在高负荷和流动条件下保留。在拟议的研究中，将确定颗粒的沉降，以获得最佳的颗粒直径和密度，并研究选择所需颗粒的标准。迄今为止，颗粒污泥单元已在欧洲率先使用柱式序批式反应器，该反应器利用快速沉降时间和连续冲洗生物质，以保持颗粒污泥，通常导致高的流出物悬浮固体。这种反应器的几何形状和对内部沉降选择的依赖限制了现有废水处理厂采用颗粒技术，这些废水处理厂已经建立了巨大的基础设施，随着工厂的扩大，这些基础设施应该得到利用。该建议是框架污泥颗粒的形成和选择方面的平衡菲克？s和斯托克？s定律。PI假设，低强度的城市废水可以提供最小的有机表面负载的易于生物降解的底物所需的胞外聚合物和颗粒的形成，以及选择的聚磷生物，当进行发酵预处理。虽然目前对颗粒形成的研究主要集中在选择颗粒污泥和选择絮凝物，但PI假设：1）平衡两种污泥结构将提供最大的反应器性能，和2）应用外部沉降选择器以优先保留良好的沉降生物质和PAO将减轻柱型颗粒反应器典型的高流出物悬浮固体负荷，稳定生物除磷。该研究有可能通过在现有基础设施中开发颗粒污泥的方法来改变美国水务部门。拟议的项目将集中在促进工业-公用事业-大学的合作伙伴关系，以废水专业。DC水和汉普顿道路卫生区一直是美国颗粒污泥技术的早期采用者，在过去的五年里，他们在污水处理厂进行了厌氧氨氧化颗粒试验研究。Co-PI将开发一个水环境联合会研讨会，促进公用事业-大学的伙伴关系，强调这些如何加速新技术的采用。

项目成果

Screen versus cyclone for improved capacity and robustness for sidestream and mainstream deammonification

• DOI: 10.1039/c9ew00384c
• 发表时间: 2019-10-01
• 期刊: ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
• 影响因子: 5
• 作者: Van Winckel, Tim;Vlaeminck, Siegfried E.;De Clippeleir, Haydee
• 通讯作者: De Clippeleir, Haydee