Removal of Trihalomethane Precursors From Water by Use of a Recirculating Ozonation/Biodegradation Systems

使用循环臭氧化/生物降解系统去除水中的三卤甲烷前体

• 批准号: 9632232
• 负责人: Susan Masten
• 金额: $ 33.72万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632232&HistoricalAwards=false
• 关键词: Removal; Trihalomethane; Precursors; Water; Use

Masten 9632232 This is an award to support research on a recirculating treatment system using ozone for improving the biodegradability of disinfection byproducts and precursors from water containing natural organic matter. The project's research objectives are to obtain an understanding of how organic materials in natural waters are modified during the application of ozone and the response of biological systems to products of this ozonation process. This knowledge will be utilized in development of mathematical models that can be used to predict removal of the target substances from water by the use of the recirculating system proposed for study in this project. The parameters to be monitored in evaluation of the system to be studied include total organic carbon, ultraviolet absorbance, alkalinity, assimilable organic carbon, trihalomethanes, haloacetic acid formation potential, heavy metals, bromide ion and specific organic compounds. This project addresses a need for determining how to deal with the presence of naturally occurring organic materials in water that combine with chlorine when used as a disinfectant to produce undesirable compounds of carcinogenic significance. Results of this project are expected to lead to mathematical models that can be utilized in the engineering design of systems to address this problem. The research being conducted involves identification of relationships between products of the ozonation process, the biodegradability of those products and the potential for the formation of trihalomethanes and other chlorinated compounds during subsequent chlorination to disinfect the treated water.

Masten 9632232 该奖项旨在支持使用臭氧的再循环处理系统的研究，以提高含有天然有机物的水中消毒副产物和前体的生物降解性。 该项目的研究目标是了解自然水中的有机物质在臭氧应用过程中如何发生变化，以及生物系统对该臭氧化过程产物的反应。 这些知识将用于开发数学模型，该模型可用于预测通过使用本项目中建议研究的再循环系统从水中去除目标物质。 在评估待研究系统时要监测的参数包括总有机碳、紫外线吸光度、碱度、可同化有机碳、三卤甲烷、卤乙酸形成电位、重金属、溴离子和特定有机化合物。 该项目解决了确定如何处理水中天然存在的有机物质的需求，这些有机物质在用作消毒剂时与氯结合，产生具有致癌意义的不良化合物。 该项目的结果预计将产生可用于系统工程设计来解决此问题的数学模型。 正在进行的研究涉及确定臭氧化过程的产品之间的关系、这些产品的生物降解性以及在随后的氯化消毒处理水过程中形成三卤甲烷和其他氯化化合物的可能性。