Collaborative Research: Assessing the bioavailability of effluent organic nitrogen along a freshwater to saltwater continuum

合作研究：评估沿淡水到咸水连续体的出水有机氮的生物利用度

• 批准号: 0755308
• 负责人: Nancy Love
• 金额: $ 3.37万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-04-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0755308&HistoricalAwards=false
• 关键词: Collaborative; Research; Assessing; bioavailability; effluent

CBET-0755308LoveThe objective of this proposed study is to address the bioavailability of effluent organic nitrogen (EON)) wastewater treatment facilities which provides biological nutrient removal. The research is intended to provide basic information that can lead to reliable bioassays to determine the effect of a wastewater plant discharge EON on the receiving surface water and contribution to eutrophication. An excellent background on known factors that affect the availability of organic nitrogen in surface waters was presented and reflected the diverse backgrounds of this collaborative research group; environmental engineer, biological oceanographer, organic geochemists, and chemical oceanographer. Basic hypothesis for the research is that the bioavailability of EON is related to salinity concentration and light and that the biota in the surface water may be different at different salinity locations and possibly have different EON conversion and uptake characteristics. The research would investigate the effect of different seed sources on the EON bioavailability. The proposal provides a plan to assess the biological populations, the level of algae growth by. Chlorophyll á measurement, the availability of the EON based on molecular weight size, and application of chemistry methods to assess the elemental composition of the EON and molecular characterization. The ability to develop a bioassay for the bioavailability of EON and to determine what amount from wastewater plant effluents is biodegradable will have far reaching impacts. First it would provide water quality managers and modelers scientific basis on whether to treat all effluent nitrogen as bioavailable as they now do or to account for a possible recalcitrant fraction that has not affect on eutrophication activity and thus does not contribute to developing hypoxia conditions that are harmful to fish. The bioassay tool can help guide wastewater plant designs as effluents from different operations can be used to determine if different design or operating conditions affect the EON bioavailability. Other important impacts are a summer mini school that can use this project and water quality issues in the Chesapeake Bay area as local and real scenario for study by the public. The work will be showcase and model for interdisciplinary research on a large scale problem. This type of training and education will have a long term impact on the graduate students working on the project. The PIs have also had successful summer research experiences for undergraduates as part of past NSF studies.

CBET-0755308Love 这项拟议研究的目的是解决提供生物营养去除的废水处理设施的废水有机氮 (EON) 的生物利用率。该研究旨在提供基本信息，以便进行可靠的生物测定，以确定污水处理厂排放的 EON 对受纳地表水的影响以及对富营养化的贡献。介绍了影响地表水中有机氮可用性的已知因素的良好背景，并反映了该合作研究小组的不同背景；环境工程师、生物海洋学家、有机地球化学家和化学海洋学家。该研究的基本假设是，EON的生物利用度与盐度浓度和光照有关，并且地表水中的生物群在不同盐度位置可能不同，并且可能具有不同的EON转化和吸收特性。该研究将调查不同种子来源对 EON 生物利用度的影响。该提案提供了一个评估生物种群、藻类生长水平的计划。叶绿素测量、基于分子量大小的 EON 的可用性以及应用化学方法评估 EON 的元素组成和分子表征。开发 EON 生物利用度的生物测定法并确定污水处理厂废水中可生物降解的量的能力将产生深远的影响。首先，它将为水质管理者和建模者提供科学依据，决定是否像现在一样将所有流出物氮视为生物可利用的氮，还是考虑可能的顽固部分，该部分不会影响富营养化活动，因此不会导致对鱼类有害的缺氧条件。生物测定工具可以帮助指导废水处理厂的设计，因为来自不同操作的废水可用于确定不同的设计或操作条件是否影响 EON 生物利用率。其他重要影响包括一所夏季迷你学校，该学校可以利用该项目和切萨皮克湾地区的水质问题作为当地的真实场景供公众研究。这项工作将为大规模问题的跨学科研究提供展示和模型。这种类型的培训和教育将对从事该项目的研究生产生长期影响。作为过去 NSF 研究的一部分，PI 还为本科生提供了成功的夏季研究经验。