Patent ID: 7390404

Claim:
An apparatus for delivery of a remediation composition into a waste stream comprising: a reservoir for a liquid, said reservoir comprising one or more openings; a dispensing element comprising a hollow cylindrical tubular body defining an interior cavity with a volume wherein the cylindrical tubular body comprises; one or two open ends; and a wall with an inner surface and an outer surface wherein at least a portion of the wall is porous and has a pore size and total pore volume that renders the wall pervious to a liquid-borne composition while impervious to solid retents; said dispensing element being positioned such that the porous portion of the wall is disposed within the reservoir while the dispensing element is fixedly disposed within at least one of said one or more openings in the reservoir such that a liquid-borne composition from within the reservoir can pass through the porous portion of the wall to the outside of the reservoir; wherein said reservoir contains a liquid composition comprising: a water-borne composition; and a non-aqueous liquid composition that is immiscible with the water-borne composition; wherein the non-aqueous liquid composition has a density that is lower than the density of the water-borne composition such that the non-aqueous liquid composition is maintained in a discrete layer above the water-borne composition; wherein the apparatus can be oriented such that the liquid composition is dispensed by gravity into a drain over time; and wherein the non-aqueous liquid composition is dispensed after the water-borne composition has been dispensed.