GOALI: Effluent Dissolved Organic Nitrogen: Compound Level Assessment of Sources and Sinks

目标：出水溶解有机氮：源和汇的化合物水平评估

• 批准号: 1511120
• 负责人: Deborah Bronk
• 金额: $ 32.97万
• 依托单位: College of William & Mary Virginia Institute of Marine Science
• 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=1511120&HistoricalAwards=false
• 关键词: GOALI; Effluent; Dissolved; Organic; Nitrogen

1511120BronkA substantial portion of the nitrogen released in wastewater effluent from water resource recovery facilities is in the form of dissolved organic nitrogen. Despite the economic and ecological importance of the dissolved organic nitrogen, relatively little is known about how different nutrient removal treatments and disinfection procedures impact the chemical composition. This work is potentially transformative because the first step in dealing with the problem of organic compounds in effluent is to determine what is in it and then the extent that it is a problem in receiving waters. This proposal fits in one of the 14 Grand Challenges in Engineering which were articulated in a National Academy of Engineering report, managing the nitrogen cycle.Past research has shown that a large fraction of effluent dissolved organic nitrogen can be bioavailable to estuarine microbes, and that low molecular weight-N substrates are released from effluent dissolved organic nitrogen during disinfection with germicidal doses of UV and chlorination and when it is exposed to sunlight or elevated salinities in the environment. What is still not known, however, is the amount and type of effluent dissolved organic nitrogen that is produced during different combinations of treatment and disinfection procedures within WRRFs and how these differences will impact how effluent dissolved organic nitrogen responds in the environment. The research proposed seeks to answer these questions. The proposed work will also extend past efforts primarily focused on N to include both C and P. This expanded emphasis is important because of the potential for effluent dissolved organic carbon to contribute to hypoxia/anoxia and effluent dissolved organic phosphorus to eutrotrophication in the environment, particularly in freshwater. The proposed research has three objectives: 1. Chemically characterize the carbon, nitrogen, and phosphorus pools present in the influent and after treatment in four sequencing batch reactors performing four different treatments (nitrification only, nitrogen removal, nitrogen and biological phosphorus removal, and nitrogen and chemical phosphorus removal) during winter and summer using wet chemical and high-resolution analyses. 2. Determine how differences in treatment process configuration impact the concentration and composition of low molecular weight-nitrogen and phosphorus following germicidal UV and chlorination relative to the effluent dissolved organic matter that receives no disinfection using wet chemical and high resolution analyses. 3. Determine how treatment process configuration and disinfection procedure combinations impact the effluent dissolved organic matter produced with respect to biological uptake and any changes in concentrations of low molecular weight carbon, nitrogen and phosphorus after exposure to sunlight and elevated salinities in receiving waters using wet chemical analyses. Perhaps one of the most important aspects of the project is bringing together a team of oceanographers (PIs Bronk and Sipler) with an environmental engineer (PI Bott) to be a valuable means of cross fertilization of knowledge, tools, and approaches between the disciplines and communities of oceanography and engineering.

1511120布朗从水资源回收设施排出的废水中释放的氮的很大一部分以溶解的有机氮的形式存在。尽管溶解有机氮的经济和生态重要性，相对较少的是知道不同的营养去除处理和消毒程序如何影响化学成分。这项工作具有潜在的变革性，因为处理污水中有机化合物问题的第一步是确定污水中含有什么，然后确定污水对接受沃茨的影响程度。这一建议符合美国国家工程院报告中阐述的14项工程重大挑战之一，即管理氮循环。过去的研究表明，大部分流出的溶解有机氮可以被河口微生物生物利用，和低分子量-在用杀菌剂量的紫外线和氯化消毒的过程中，当污水暴露在阳光下或环境中的盐度升高。然而，目前尚不清楚的是，在WRRF内处理和消毒程序的不同组合过程中产生的污水溶解有机氮的数量和类型，以及这些差异将如何影响污水溶解有机氮在环境中的反应。这项研究试图回答这些问题。拟议的工作还将扩大过去的努力主要集中在N，包括C和P。这扩大的重点是重要的，因为潜在的污水溶解的有机碳，以促进缺氧/缺氧和污水溶解的有机磷富营养化的环境，特别是在淡水。本研究有三个目的：1.在冬季和夏季，使用湿化学和高分辨率分析，在四个序批式反应器中进行四种不同的处理（仅硝化，脱氮，脱氮和生物除磷，脱氮和化学除磷），对进水和处理后的碳，氮和磷池进行化学表征。2.确定处理工艺配置的差异如何影响杀菌UV和氯化后低分子量氮和磷的浓度和组成，相对于未使用湿化学和高分辨率分析进行消毒的流出物溶解有机物。3.使用湿化学分析确定处理工艺配置和消毒程序组合如何影响在生物吸收方面产生的流出物溶解有机物，以及暴露于阳光和接收沃茨中盐度升高后低分子量碳、氮和磷浓度的任何变化。也许该项目最重要的方面之一是汇集了一个海洋学家团队（PIs Bronk和Sipler）与环境工程师（PI Bott），成为知识，工具和方法在海洋学和工程学科和社区之间交叉施肥的宝贵手段。