Method Category: Wastewater

This test method measures the volatile suspended solids (VSS) content in water or wastewater samples—representing the organic portion of suspended solids, which is essential for monitoring biological treatment processes.

This test method is a gravimetric procedure that measures the residue remaining after a water sample is filtered and evaporated at 180°C.

This test method quantifies the volume of solids in a sample that settle out of suspension within a specified time under quiescent conditions. It is used to assess the settleability of solids in treatment processes, such as sedimentation in wastewater systems.

This test method is a gravimetric procedure for determining Total Solids (TS) in water, wastewater, and sludge samples by measuring the residue remaining after drying.

This test method determines Total Suspended Solids (TSS) in water and wastewater samples. TSS refers to the dry weight of particles trapped by a glass fiber filter.

This test method is a procedure for determining Total Volatile Solids (TVS) in water, sludge, or wastewater samples. TVS refers to the portion of total solids that is lost upon ignition at 550°C, representing the organic matter content.

This test method is a procedure for measuring turbidity in water and wastewater using a turbidimeter, an instrument that detects the intensity of light scattered at a 90-degree angle by suspended particles in the sample.

This test method is a standard method used to measure organic nitrogen concentrations in water and wastewater samples. Organic nitrogen refers to nitrogen bound within organic compounds, distinct from inorganic nitrogen forms like ammonia or nitrate.