On the common post clarified water, an i::scan is setup in a flow cell arrangement, measuring solids compensated UV254 every two minutes and the analogue output is fed back to the concube controller.

How does measuring multiple UV wavelengths provide better NOM characterisation than traditional UV254 or True Colour only based systems?

Compass EOR characterises NOM by calculating a dimensionless parameters using the ratios of absorbance readings at multiple UV wavelengths. A low NOM value(<0.3)implies that dissolved organic material is of low molecular weight and hydrophilic. Such material is not readily removed by coagulation and when present particulate matter tends to dominate coagulant demand. A high NOM value(>0.5)implies that dissolved organic material is of high molecular weight and hydrophobic(e.g.fulvic and humic acids). Such material is readily removed by coagulation and when present dominates coagulant demand. If the NOM value is between 0.3 and 0.5 it implies there is a mixture of organic molecules present and both particulate and organic matter influences coagulant demand. The NOM characterisation parameter is used by Compass EOR to determine the weightings used in their proprietary algorithms.

How do operations interact with a Compass EOR system?

Compass EOR is designed to enable full automatic coagulation control without operator interaction. However, the Compass EOR interface enables operators to manually intervene should they want to.