Systems for removing impurities from galvanizing flux solution

A system for removing contaminants from a solution in a treatment apparatus, the system comprising:

• a concentration loop having an input to receive contaminated solution from the treatment apparatus and an output to return purified solution to the treatment apparatus, the concentration loop comprising:
• a circulation pump having an input and an output;
• a cross-flow microfilter having an input, a retentate output, and a permeate output, wherein the input of the microfilter is coupled to the output of the circulation pump, and the permeate output of the microfilter is coupled to the output of the concentration loop;
• and
• an eductor having a main input, a suction input, and an output, wherein the main input of the eductor is coupled to the retentate output of the microfilter;
• wherein:
• the concentration loop further comprises a concentration tank having an output port coupled to the input of the circulation pump;
• the output of the eductor is arranged to return retentate to the concentration tank;
• and
• the concentration loop further comprises a diffuser located in the concentration tank and coupled to the output of the eductor.