Nalco Company

Bosco P Ho

E H Kelle Zeiher

John E Hoots

E H Zeiher

Martin R Godfrey

Mita Chattoraj

Michael V Enzien

Steven R Hatch

Andrew J Cooper

Binaifer S Bedford

May M Wu

May W Wu

Binaifer Bedford

Methods and systems for monitoring and controlling the cleaning of membrane separation systems or processes are provided. The present invention uses detectable amounts of one or more inert fluorescent tracers added to a membrane cleaning process stream to evaluate and control the removal of contaminants and impurities during cleaning. The methods and systems of the present invention can be used in a variety of different industrial applications including raw water processing and waste water processing.

Method of monitoring membrane cleaning processes

Methods and systems for monitoring and/or controlling the cleaning of membrane separation systems or processes are provided. The present invention utilizes measurable amounts of inert fluorescent tracer(s) added to a membrane cleaning process stream to evaluate and/or control the removal of contaminants and/or impurities during cleaning. The methods and systems of the present invention can be utilized in a variety of different industrial applications including raw water processing and waste water processing.

Methods and systems for monitoring and/or controlling membrane separation systems or processes are provided. The present invention utilizes measurable amounts of inert fluorescent tracer(s) added to a feed stream to evaluate and/or control the purification of such feed stream during membrane separation. The methods and systems of the present invention can be utilized in a variety of different industrial applications including raw water processing and waste water processing.

Method of monitoring membrane separation processes

Methods and systems for monitoring and/or controlling membrane separation systems or processes are provided. The present invention utilizes measurable amounts of inert fluorescent tracers and tagged fluorescent agents added to a feed stream to evaluate and/or control one or more parameters specific to membrane separation such that performance thereof can be optimized. The methods and systems of the present invention can be utilized in a variety of different industrial applications including raw water processing and waste water processing.

A method for locating hidden microorganism contaminated surfaces in industrial water systems is described and claimed. The method works by applying a solution or dispersion of a fluorogenic reagent in water to the hidden water contact surfaces of said industrial water system and allowing said fluorogenic reagent to react with any hidden microorganisms present, wherein said fluorogenic reagent is selected from the group of fluorogenic reagents that are known to react with microorganisms such that a fluorescent signal of said fluorogenic reagent is detectable in such a way as to make the detection of the fluorescent signal indicate that there are hidden microorganisms present on the water contact surfaces of the equipment and piping.

Method for locating hidden microorganism contaminated surfaces in industrial water systems

Methods for monitoring and/or controlling biofouling in membrane separation systems are provided. The present invention utilizes measurable amounts of fluorogenic agent(s) added to a feed stream to monitor and/or control the level of microbial growth during membrane separation and, thus, the purification of such feed stream during membrane separation.

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Wheaton, IL, United States of America

Bosco P Ho