What is the term for a solid that can be filtered from wastewater?

The correct term for a solid that can be filtered from wastewater is "Total suspended solids." This refers to solid particles that are suspended in the liquid phase of the wastewater, making them filterable. These solids can include a variety of materials such as organic matter, sediment, and pollutants that are not dissolved in the water but exist in a particulate form.

Understanding this is essential for wastewater treatment processes, as total suspended solids are a critical parameter in evaluating the quality of wastewater. Effective treatment involves removing these solids to reduce pollution and improve the overall quality of the discharge.

In contrast, total dissolved solids refer to the minerals, salts, and other compounds that are dissolved in water, which cannot be filtered out in the same way as suspended solids. Residual solids typically refer to the mass that remains after treatment processes, while filtrable residues may generally apply to those materials that can pass through a filter, but are not specifically the defined measure used in wastewater treatment contexts. Thus, the focus on "total suspended solids" aligns best with the definition of solids that can be filtered from wastewater.