Patent ID: 8789407
Filing Date: 2014-07-29
Classification: G01N

Abstract:
1. A method for determining a quantity of filter aid that has been added to a liquid medium in a system that is traversed by said liquid medium and into which filter aid is added, said method comprising, at a first measurement point, obtaining a first measurement of a characteristic, at a second measurement point, obtaining a second measurement of a characteristic, wherein said first measurement point is upstream of where filter aid is added to said system, wherein said second measuring point is downstream of where filter aid is added to said liquid medium, wherein said characteristic is one that changes with concentration of filter aid, wherein said characteristic is selected from the group consisting of physical characteristics and chemical characteristics, whereby, as a result of addition of said filter aid between said first measuring point and said second measuring point, said first measurement differs from said second measurement, and determining an actual quantity of filter aid that has been added to said medium based at least in part on said first measurement and said second measurement.