METHOD AND PLANT FOR TREATMENT OF AQUEOUS DISPERSION

摘要

A plant for treatment of a waste water stream comprising fat includes pre-treatment apparatus for removal of liquid oil and gross contaminants, a flow-through assembly for electrocoagulation treatment of a liquid, a floc-separation apparatus arranged for removal of a flocculated fat-containing layer from the aqueous dispersion to provide clarified aqueous solution for disposal and a controller arranged to control voltage and/or current across the electrodes and the flow of the waste water stream through the components of the plant. Also disclosed are methods for using the plant to provide efficient separation with minimised power consumption as flow and contaminant level vary.

主权项

1. A plant for treatment of a waste water stream comprising fat particles dispersed therein, the plant comprising:
a) a pre-treatment apparatus for separation and removal of liquid oil and gross contaminants from said waste water stream in use to provide a remaining aqueous dispersion comprising fat particles dispersed in aqueous solution, b) a flow-through assembly arranged for electrocoagulation treatment of said aqueous dispersion, the assembly comprising:
a flow-through chamber comprising opposed electrodes and sacrificial electrodes positioned therebetween; anda power supply arranged to apply a voltage across the electrodes and to cause a current to flow therebetween through said aqueous dispersion in use; c) a floc-separation apparatus arranged for separation and removal of a flocculated fat-containing layer, formed by flocculation of said fat particles after electrocoagulation treatment of said aqueous dispersion, to provide a remaining clarified aqueous solution; and d) a controller arranged to control voltage and/or current across the electrodes and the flow of the waste water stream through the components of the plant.