Regulating water treatment agent dosage based on operational system stresses

A method of regulating the in-system concentration of a water treatment agent in an industrial fluid system comprising:

• adding an inert tracer to an industrial fluid system, the inert tracer being added in known proportion to a target specie also being added to said industrial fluid system, wherein the system consumption of the target specie is effected by the water treatment agent;
• drawing a sample of fluid from said industrial fluid system;
• adding to the sample an incipient reagent in an amount effective to convert the target specie to a subject target specie indicator;
• monitoring the subject target-specie indicator by analysis of said sample to determine at least one characteristic that can be correlated to an in-system concentration of said target-specie;
• monitoring said inert tracer by analysis of said sample to determine the in-system concentration of said inert tracer;
• determining the system consumption of the target specie from the measured in-system concentration of the target specie and the inert tracer;
• and
• regulating the in-system concentration of the water treatment agent in the fluid system based on the system consumption of the target specie.

A method of target-specie responsive regulation of water treatment agent in-system concentration in an industrial fluid system comprising:

• drawing a sample of fluid from an industrial fluid system containing at least one target specie, wherein said system consumption of the target specie is affected by at least one water treatment agent;
• adding to said sample an incipient reagent in an amount effective to convert said target specie to a target-specie indicator which comprises a combination of said incipient reagent and said target specie;
• monitoring said target-specie indicator by fluorescence analysis of said sample to determine at least one fluorescence characteristic of said target-specie indicator that can be correlated to the in-system concentration of said target-specie indicator;
• correlating said in-system concentration of said target-specie indicator to an in-system concentration of said target specie;
• adding an inert tracer to said industrial fluid system in known proportion to the feed of said target specie to said industrial fluid system;
• monitoring said inert tracer by analysis of said sample to determine the in-system concentration of said inert tracer;
• correlating said in-system concentration of said inert tracer to a zero-consumption concentration of said target specie;
• determining the system consumption value for said target specie by subtracting said in-system concentration of said target specie from said zero-consumption concentration of said target specie;
• and
• regulating the in-system concentration of a water treatment agent in said fluid system based on said system consumption of the target specie.