Towards Energy Efficiency Through Low-DO Nitrification: Extending our Knowledge of Ammonia-Oxidizing Organisms

通过低溶解氧硝化提高能源效率：扩展我们对氨氧化生物的了解

• 批准号: 1435661
• 负责人: Daniel Noguera
• 金额: $ 33.02万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1435661&HistoricalAwards=false
• 关键词: Towards; Energy; Efficiency; Through; Low

1435661NogueraTowards Energy Efficiency Through Low-DO Nitrification: Extending our Knowledge of Ammonia-Oxidizing Organisms In wastewater treatment activated sludge is a common process. Activated sludge is the single largest energy user because of the amount of oxygen that is needed to maintain aerobic (oxygen rich) conditions. This proposal seeks to identify and characterize the novel organisms that perform ammonia oxidation under low-DO conditions and thereby reducing the cost of the process. The hypothesis is that unrecognized ammonia-oxidizing organisms are likely responsible for nitrification in low-dissolved oxygen activated sludge systems. If this study is successful it will result in a significant reduction in energy costs for many wastewater treatment plants in the Nation. The project will also allow the PIs to continue mentoring high school, undergraduate, and graduate students, and will fund the training of two PhD students from underrepresented groups in science and engineering.Technically, the project is divided into three tasks which include; 1) screening a collection of pure cultures isolated from a lab-scale reactor performing efficient nitrification, 2) focused on the identification of the abundant ammonia-oxidizing organisms in lab-scale reactors, and 3) conduct kinetic experiments to characterize the microbial communities in pilot-scale reactors coupling and treating primary effluent from a full scale wastewater treatment plant. The effective coupling of enhanced biological phosphorus removal and low-dissolved oxygen nitrification will be a transformative development, since aeration for nutrient removal can account for nearly half of the energy use. This project will enable development of new technologies that contribute to the wastewater industry's overarching goals of achieving energy neutrality and shifting the focus from waste treatment to resource recovery facilities.

1435661 Noguera通过低溶解氧硝化提高能源效率：扩大我们对氨氧化生物的了解在废水处理中，活性污泥是一种常见的工艺。 活性污泥是单一的最大的能源用户，因为需要维持有氧（富氧）条件的氧气量。该提案旨在鉴定和表征在低DO条件下进行氨氧化的新型生物，从而降低该过程的成本。这一假设是，未被识别的氨氧化生物可能是负责硝化低溶解氧活性污泥系统。 如果这项研究成功，将大大降低全国许多污水处理厂的能源成本。该项目还将允许PI继续指导高中生、本科生和研究生，并将资助培训两名来自科学和工程领域代表性不足群体的博士生。从技术上讲，该项目分为三项任务，其中包括; 1）筛选从进行有效硝化的实验室规模反应器分离的纯培养物的集合，2）重点对实验室规模反应器中丰富的氨氧化微生物进行鉴定; 3）对中试规模反应器耦合处理一级出水的微生物群落进行动力学实验表征。强化生物除磷和低溶解氧硝化的有效耦合将是一个变革性的发展，因为用于营养物去除的曝气可以占近一半的能量使用。该项目将有助于开发新技术，促进废水处理行业实现能源中性和将重点从废物处理转移到资源回收设施的总体目标。