Preconcentration of wastewater through the Niro freeze concentration process

According to an extensive study conducted in the early nineties, the best method for treating hazardous caustic wastewater coming from an SMPO (styrene monomer/propylene oxide) production plant is the combination of freeze concentration followed by incineration of the concentrate. This work provides a thorough description of the principle of freeze concentration after the Niro freeze concentration process together with an example and an economical comparison with direct incineration.