WASTEWATER
By Rick LallishWhat piece of laboratory equipment is used to determine settleable solids?A. CrucibleB. SettleometerC. Imhoff coneD. FilterAnswer: C. The settleable solids test is used to measure the volume of settleable solids in one liter of sample over a one-hour period. It is an indicator of how much solids will settle in a clarifier or pond. It is read as milliliters per liter. The Imhoff cone is made of plastic or glass and is the proper piece of equipment to perform this analysis. It should not be confused with a settleometer, which is used to measure settling of mixed liquors in an activated sludge
