Collaborative Research: NSF-BSF: Mainstream deammonification by ion exchange and bioregeneration via partial nitritation/anammox

合作研究：NSF-BSF：通过离子交换进行主流脱氨，并通过部分亚硝化/厌氧氨氧化进行生物再生

基本信息

批准号：
2000980
负责人：
Sarina Ergas
金额：
$ 18.94万
依托单位：
University of South Florida
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-15 至 2024-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2000980&HistoricalAwards=false
关键词：
Collaborative Research NSF BSF Mainstream

项目摘要

Conventional wastewater treatment plants (WWTPs) are designed to remove harmful microorganisms, organic matter, and nutrients like nitrogen and phosphorus. They achieve this using a combination of physical, chemical, and biological treatment processes. Recent research has established that the integrated biological process called partial nitritation and anammox (PN/A) can remove nitrogen while reducing energy costs or even producing energy. However, the concentration of ammonia in domestic wastewater is too low to support the growth of the microorganisms required to carry out the PN/A process. The goal of this project is to develop a novel system to create the conditions needed to run the PN/A process. To achieve this goal, an interdisciplinary team of researchers will pool their knowledge and resources to improve the PN/A process using low-cost naturally occurring mineral ion exchange (IX) material called zeolite. These will be combined to develop IX-PN/A reactors to create conditions for the growth of PN/A microbes. The team will then investigate and optimize the reactor operating conditions that favor the IX-PN/A process. Successful completion of this project will benefit society through the development of new designs for next-generation sustainable WWTPs. Further benefits to society will be achieved through student training and education including the recruitment and mentoring of students from community colleges and underrepresented groups in Pennsylvania and Florida. Increasingly stringent nutrient discharge limits and concerns with energy consumption have driven a shift from energy-intensive wastewater treatment plants (WWTPs) to more sustainable energy positive resource recovery facilities. Integrated partial nitritation and anammox (PN/A) is one such process that has the potential to enable significant reductions in the energy consumption and carbon footprint of conventional WWTPs. However, the concentration of ammonia in domestic wastewater is too low for the microorganisms required to carry out the PN/A process to flourish. The goal of this project is to develop the fundamental knowledge required to advance the implementation of the PN/A process into conventional WWTPs. To achieve this goal, the research team will couple ion exchange (IX) with the PN/A process to create the microenvironment needed to improve the kinetics of the PN/A process. This will be achieved using new zeolite-based biofilm carriers in conjunction with novel bioreactor designs and operational strategies to advance the IX-PN/A process. The specific research objectives of this project are to: 1) evaluate the effects of reactor configuration and operating conditions on the performance of the IX-PN/A; 2) investigate the synergistic metabolic processes of the PN/A microorganisms using genomics and molecular tools; and 3) characterize flow and reactive transport in attached-growth biofilms using X-ray microtomography (micro CT). Successful completion of this project has potential for transformative impact through the development of new knowledge that will reduce the carbon footprint of biological nutrient removal processes used in WWTPs to manage eutrophication and health issues caused by nitrogen discharge.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

常规的废水处理厂（WWTPS）旨在去除有害的微生物，有机物以及氮和磷等营养。他们使用物理，化学和生物治疗过程的结合来实现这一目标。最近的研究表明，称为部分硝化的综合生物学过程和Anammox（PN/A）可以去除氮，同时降低能源成本甚至产生能量。但是，国内废水中氨的浓度太低，无法支持执行PN/A过程所需的微生物的生长。该项目的目的是开发一个新型系统，以创建运行PN/A流程所需的条件。为了实现这一目标，一个跨学科的研究人员将使用低成本自然发生的矿物离子交换（IX）材料（IX）材料来改善PN/A的知识和资源，称为Zeolite。这些将结合起来开发IX-PN/A反应器，以创建PN/A微生物生长的条件。然后，团队将调查并优化有利于IX-PN/A流程的反应堆操作条件。成功完成该项目将通过为下一代可持续wwtps的新设计开发新设计而受益。将通过学生培训和教育获得进一步的社会利益，包括在宾夕法尼亚州和佛罗里达州的社区学院和代表性不足的团体中招募和指导学生。越来越严格的养分排放限制和能源消耗的关注使从能源密集型废水处理厂（WWTPS）转变为更可持续的能源积极资源回收设施。综合局部硝酸和厌氧（PN/A）就是这样一个过程，它有可能大大减少常规WWTP的能源消耗和碳足迹。但是，家庭废水中氨的浓度太低，无法进行PN/A繁殖过程所需的微生物。该项目的目的是开发将PN/A流程实施到常规WWTP中所需的基本知识。为了实现这一目标，研究团队将将离子交换（IX）与PN/A的流程相结合，以创建改善PN/A流程动力学所需的微环境。这将使用新的基于沸石的生物膜载体以及新型生物反应器设计和操作策略来实现这一目标，以推动IX-PN/A工艺。该项目的具体研究目标是：1）评估反应堆配置和操作条件对IX-PN/A性能的影响； 2）使用基因组学和分子工具研究PN/A微生物的协同代谢过程；和3）使用X射线微传输（Micro CT）表征在附着生长生物膜中的流动和反应性转运。该项目的成功完成通过发展新知识具有潜在的变革性影响，这将减少WWTP中使用的生物营养清除过程的碳足迹，用于管理氮的富营养和由氮排放引起的健康问题。这奖反映了NSF的法规任务，并被认为是通过基础知识的智力优点和广泛的范围来评估的，并且值得通过评估来进行评估。