Which parameter can be continuously monitored from the following options?

pH is a parameter that can be continuously monitored in wastewater treatment processes. Continuous monitoring of pH is important because it reflects the acidity or alkalinity of the water, which can significantly influence biochemical processes and the effectiveness of treatment methods. Many treatment systems require frequent adjustments based on pH levels, making real-time monitoring critical.

The other parameters, while important, are typically measured using methods that do not allow for continuous monitoring. Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) are usually analyzed through laboratory tests that require sample collection and may take several hours to provide results. Suspended solids are often gauge through sample analysis as well, and while turbidimeters can provide real-time data on turbidity, they may not directly measure suspended solids in the same continuous manner as pH meters do. Thus, pH stands out as the parameter most suitable for continuous monitoring in wastewater treatment applications.