Patent ID: 8646493

Claim:
A method of handling a concentrated solution of a substance in a fluid comprising: flowing the fluid from a source into a first container containing a first charge of the substance to generate a solution of the substance in the fluid; flowing the solution from the first container to a sink; upon approaching exhaustion of the first container, flowing the solution from the first container into a second container containing a second charge of the substance to generate a solution of the substance of the second charge in the solution from the first container and flowing the solution from the second container to the sink; upon full exhaustion of the first container, isolating the first container from the flow of the fluid from the source by redirecting the fluid from the source to bypass the first container and to flow directly into the second container; and replacing the exhausted first container with a replacement first container containing a third charge of the substance, venting the second container during the course of generating the solution in the second container, and flowing solution from the first container into a main fluid line extending from the source to the sink once the second container is filled with the generated solution.