New developments in monitoring : particulate emissions

Continuous emission monitoring (CEM) systems are becoming increasingly prevalent in industrial plants worldwide. Many devices and techniques such as opacity monitors and the EPA Method 5 have been used for many years, with wide industrial acceptance. However, newer approaches using techniques such as the triboelectric effect and optical analysis have emerged. The goal of this study is to determine the accuracy and consistency of these units and their applicability to different plant situations. Other purchasing factors such as ease of installation and cost also are considered. Obviously, a general study of this sort cannot provide definite information for each type of application. Each plant must make its own determination based on local factors.