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

Masten 9632232 这是一个奖项，以支持研究循环处理系统使用臭氧，以提高生物降解消毒副产品和前体的水含有天然有机物。 该项目的研究目标是了解自然沃茨中的有机物质在臭氧的应用过程中是如何发生变化的，以及生物系统对这种臭氧化过程的产物的反应。 这些知识将被用于开发数学模型，该模型可用于预测通过使用本项目中拟议研究的再循环系统从水中去除目标物质。 在评价待研究的系统时要监测的参数包括总有机碳、紫外吸光度、碱度、可同化有机碳、三卤甲烷、卤乙酸形成潜力、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材料的需要，当用作消毒剂时，该有机材料与氯结合联合收割机，产生具有致癌意义的不良化合物。 该项目的结果预计将导致数学模型，可用于系统的工程设计，以解决这一问题。 正在进行的研究包括确定臭氧化过程中的产品之间的关系，这些产品的生物降解性，以及在随后的氯化消毒处理过的水时形成三卤甲烷和其他氯化化合物的可能性。

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.