The best way to evaluate the effluent TSS concentration from a plant is to:

The best way to evaluate the effluent Total Suspended Solids (TSS) concentration is by checking the composite sample of TSS. A composite sample is advantageous because it integrates multiple discrete samples taken over a specific time period, thus providing a more representative measurement of the effluent quality. This method accounts for variations in TSS concentration throughout the day, capturing fluctuations that might occur due to changes in influent flow or composition.

Composite sampling is particularly useful in wastewater treatment, as TSS concentrations can be dynamic based on operational fluctuations, influent characteristics, and treatment effectiveness. By collecting water samples over time and averaging the results, operators can ensure they are assessing the true performance of the treatment process in managing solids.

Other options may offer limited reliability. Monitoring hourly samples might capture time-dependent variations but could miss an overall trend and lead to misinterpretation of data. Observing visual clarity provides only subjective information, not quantifiable data on TSS levels. Measuring inline sensors may provide continuous data but could be affected by calibration issues or maintenance needs, sometimes leading to inaccurate readings if not properly managed. Overall, composite sampling remains the most reliable method for accurately assessing TSS in effluent.