Patent ID: 7785478
Filing Date: 2010-08-31
Classification: A01N,Y10S

Abstract:
1. A method of destroying protozoa trophozites and cysts that carry or harbor bacteria in an aqueous system comprising encapsulating a biocide in a micro- or nano-capsule having an exterior composition adapted for digestion by said protozoa, and introducing the biocide containing micro- or nano-capsules into said aqueous system, wherein the amount of the biocide introduced into the aqueous system is from about 0.05 to about 500 micrograms per milliliter, and wherein said protozoa digests and engulfs the micro- or nano-capsule, which places the biocide inside the protozoa to destroy said protozoa and bacteria, without causing the protozoa to revert back to a cyst form.