Patent ID: 8338186

Claim:
A system for purifying an aqueous contaminated fluid from colloidal contaminant using a purifying agent, the system comprising: (a) an input analyzer, measuring a concentration of the colloidal contaminant in the aqueous contaminated fluid, the input analyzer comprising: (a1) a sample cell, comprising: (i) a trapping medium for entrapping the colloidal contaminant from the aqueous contaminated fluid flowing through the trapping medium; the trapping medium being made of the same material as the purifying agent the purifying agent possessing metathetical properties; (ii) the trapping medium having an outer surface and an inner surface; the trapping medium being translucent and having an essentially closed form defined by the outer surface, with a cavity formed inside thereof defined by the inner surface; (iii) an outer structural support surface and an inner structural support surface formed on or adjacent to the outer surface and the inner surface respectively; and (iv) a radiation source illuminating the trapping medium with excitation radiation to cause the entrapped colloidal contaminant to generate a secondary radiation indicative of identity of the colloidal contaminant, or the identity and the concentration of the colloidal contaminant the radiation source being placed inside the cavity to illuminate the trapping medium from inside thereof outwards; (b) a mixer, mixing the purifying agent and the aqueous contaminated fluid, resulting in a mixture of the purifying agent with the entrapped colloidal contaminant and aqueous purified fluid; (c) a processor and a computer readable storage medium having computer readable instructions stored thereon for execution by the processor, for: (c1) retrieving a relationship, stored in the computer readable medium, between the concentration of the colloidal contaminant in the aqueous purified fluid and concentration of the purifying agent supplied to the aqueous contaminated fluid; (c2) retrieving a target concentration of the colloidal contaminant in the aqueous purified fluid stored in the computer readable storage medium; (c3) determining an estimated optimal concentration of the purifying agent in the aqueous contaminated fluid required for achieving the target concentration of the colloidal contaminant in the aqueous purified fluid based on said relationship and the target concentration; (c4) controlling dispensing of the purifying agent into the mixer in an amount required to achieve the estimated optimal concentration of the purifying agent in the aqueous contaminated fluid; and (d) a separator, removing the purifying agent with the entrapped colloidal contaminant from the mixture to obtain the aqueous purified fluid.