Control of Water Effluent or Process Quality

摘要

Control of the coagulation and flocculation of the incoming raw water (or sludge liquors or effluents) is critical for ensuring good water quality and control of the treatment process. Many factors influence the optimum coagulation set point and flocculation of the materials to be removed from the raw water source. Jar tests have been used for years to "ballpark" coagulant dose. Jar tests have limitations in that they are time consuming, intermittent, and are subject to variations in operator's visual observations. To help improve coagulant demand calculations, zeta meters (ZM) have been used to improve jar tests results with good results. Zeta potential is a measure of particle surface charge. Prior to the advent of electro-kinetic potential monitors, zeta meters were the primary instruments for measuring electro-kinetic properties as related to coagulant dose. Both instruments measure charge, but use very different methods.