Minimizing Trihalomethanes and Their Mitigation Costs using Automated On-Line Monitoring for Process Mapping and Optimization

摘要

The USEPA has provided several analytical methods that can be used for compliance monitoringrnof Total Trihalomethanes. Most are relatively complex and expensive to perform. For manyrnwater utilities, the cost of purchasing, maintaining and operating such analytical instruments isrnprohibitive. Operators and process engineers recognize the need for some sort of trihalomethanesrnmeter to be used for process control, but historically, there have been few options available. Inrnthis paper, a commercially available device is presented that can function as a THMs meter. Thisrndevice provides hourly measurements of the individual and total concentrations ofrntrihalomethanes on-site and on-line using a fully automated approach that includes datarncollection, treatment and reporting. Using the data that the system provides allows operators tornrespond in real-time to changes in trihalomethane concentrations as they occur, and ultimatelyrnleads to higher quality drinking water with significant cost savings.