Patent ID: 9487412
Filing Date: 2016-11-08
CPC Classification: B07B,B09C,C02F

Claim Text:
1. A system for remediating contaminated soil, the system comprising: a screen having an input, a silt output and a coarse soil output, the screen accepting contaminated soil at the input and operable to separate, out of the contaminated soil, silt having particle sizes less than a predetermined particle size; at least one hydrocyclone having an input connected to the coarse soil output of the screen, said at least one hydrocyclone having a fine soil output and at least one coarse soil output, the fine soil output of said at least one hydrocyclone connected to the input of the screen; at least one remediating unit having an input connected to said at least one coarse soil output of said at least one hydrocyclone, said at least one remediating unit eluting soil contaminants by washing with an acid solution including phosphoric acid and having an output; a filtering unit having an input connected to the output of said at least one remediating unit, the filtering unit separating process water from soil washed in the remediating unit and having a process water output; and a washing-recycling unit having an input connected to the process water output of the output of the filtering unit, the washing-recycling unit absorbing contaminants from the process water to produce treated process water, an output of the washing-recycling unit connected to the screen to supply treated process water to the screen.