Thermobalance is not a standard method for measuring total suspended solids (TSS) in wastewater. The most common way to measure TSS is by filtering a known sample volume, drying the filter and captured solids, and then weighing the filter to determine the weight of the captured suspended solids in the sample. The process takes about 2 hours (or more) and does not lend itself to instantaneous, continuous measurement.

Suppose you are interested in measuring TSS online. In that case, you can use a turbidity sensor to measure the amount of light scattered in the sample, which is proportional to the amount of suspended solids in the sample. This method allows for instantaneous monitoring and control of the process where the sensor is installed.

For furhter information see:

Measuring-Suspended-Solids-AppNote-AN-SSONLINE-EN.pdf (thermofisher.com)

Thermobalance method is not reliable because continuously measuring the mass variation of the sample with respect to its initial mass. The measured variations being often very weak, one generally speaks about microbalance.

A well-mixed sample is filtered through a weighed standard glass-fiber filter and the residue retained on the filter is dried to a constant weight at 103 to 105°C. The increase in weight of the filter represents the total suspended solids. And A traditional convection oven drying process is covered as well as solids determination using an automated infrared moisture analyser. The convection oven method is recommended for wine samples. 2.1 The purpose of this procedure is to determine the amount of total solids remaining after drying a biomass sample at 105°C.

A thermobalance is typically used for measuring mass changes in a sample as a function of temperature. While it can provide information about thermal properties, it may not directly measure total suspended solids (TSS) in wastewater. TSS is commonly determined through methods like gravimetric analysis or filtration.

If you have specific requirements for measuring TSS, it's recommended to use appropriate methods such as standard laboratory procedures for wastewater analysis rather than relying solely on a thermobalance.

Approved standardized methods specify what equipment should be used. If you are testing new types of equipment, you need to obtain sufficient data and evaluate the error of the method using the new equipment and prove that the error does not exceed acceptable limits. These limits are specified in the method.

Such work necessitate filtration of a defined volume of wastewater and collecting the solids isolated, drying them followed by simple weighing on an analytical balance (NOT A THERMOBALANCE) and divide the weight of the particles on the total volume of the original sample to have the result as weight of suspended particle per sample volume. Thus, try to keep the thermobalance for more complicated applications.... Regards