For real time process control the UV 254nm water quality parameter can be measured using the Real UVT Online monitor. Examples of process control applications that require organics instrumentation include industrial applications such as food processing and pulp and paper manufacturing, and also municipal applications such as coagulation.

In general, process control is designed using either an open loop or a closed loop approach. In an open loop system, the Real UVT Online monitor would be installed in front of a given process such as sampling the raw water in a municipal plant coagulation process. Alternatively, the monitor can sample at the end of a process to allow feedback to be provided to the control system for improved process control.

However, due to the complexity of many process control applications it is beneficial to have organics data samples from both before and after the process. This allows more precise conclusions to be drawn about the efficiency and effectiveness of a process. Having real time organics data from both before and after the process allows a determination of the effectiveness of the process independent of the absolute organics levels in the water, while at the same time allowing absolute organics levels to be taken into consideration.

Clearly, real time organics sampling both before and after a given process allows a plant to have improved control or optimization of the process. Unfortunately, this would generally require the use of two organics monitoring instruments doubling initial investment and maintenance requirements, unless you are using the Real UVT Online monitor.

The Real UVT Online monitor provides a dual feed feature, which enables one online UV 254nm testing monitor to be used for two sample water feeds.

For example, in a municipal plant coagulation application, by using a Real UVT Online monitor with the dual feed feature, the raw and treated water can be measured to provide percent removal of organics by the coagulation treatment process. The plants goals for effectiveness of the coagulation process, whether it be 40% removal of organics or 60% removal of organics, can continuously be monitored providing a real time understanding of the effectiveness of their coagulation treatment process and ensuring their organic removal goals are being met at all times.