The Composition of the Waste

The initial problem was to decolorize the complex wastewater from an industrial site. The waste originated in a pigment plant and advice indicated that it contained low molecular weight alkyd (sic) polyester resins derived from the reaction of triglycerides and anhydrides like phthalic anhydride along with epoxide resins, derived from bisphenol, and epichlorohydrin and amine resins from melamine and formaldehyde. Lesser quantities of higher molecular weight materials, from polymerization of vinyl, acrylate, or methacrylate monomers were also present. The effluent had a total organic carbon content (TOC) of 2770 mg/l and a total suspended content (TSC) of 7429 mg/l.

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