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

Masten 9632232这是一个奖项，旨在支持使用臭氧的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品和前体的生物降解性。该项目的研究目标是了解在应用臭氧期间如何改变自然水域中的有机物质，以及生物系统对这一臭氧过程产生的产物的反应。这些知识将被用于开发数学模型，这些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的情况。在评价被研究的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、三卤代甲烷、卤代乙酸形成势、重金属、溴离子和特定的有机化合物。这个项目需要确定如何处理水中天然有机物质的存在，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受欢迎的化合物。预计该项目的结果将导致可用于系统工程设计的数学模型，以解决这一问题。正在进行的研究涉及确定臭氧处理过程的产物、这些产物的生物降解性以及在随后的氯化过程中形成三卤代甲烷和其他氯化化合物以对处理后的水进行消毒的可能性之间的关系。

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.