Nalco Company

Ondeo Nalco Company

Kristine S Salmen

John H Collins

Prasad Y Duggirala

Sergey M Shevchenko

William J Ward

Jitendra T Shah

Seong-Hoon Yoon

Deepak A Musale

Willam J Ward

A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and claimed.

Methods to enhance pulp bleaching and delignification

A method of conditioning mixed liquor in a membrane biological reactor comprising adding to the mixed liquor an effective coagulating and flocculating amount of one or more water soluble cationic, amphoteric or zwitterionic polymers, or combination thereof and methods of reducing membrane fouling, enhancing membrane flux and reducing sludge production.

Method of using water soluble polymers in a membrane biological reactor

An activated sludge process for the clarification of wastewater comprising introducing the wastewater into a reactor where microorganisms consume organic material in the wastewater to form a mixed liquor comprising water, the microorganisms and an activated sludge; separating clarified water from the mixed liquor by filtration through a microfiltration or ultrafiltration membrane; separating the activated sludge from the mixed liquor; adding to the activated sludge at least one high molecular weight water soluble polymer to form a mixture of water and coagulated and flocculated solids; dewatering the coagulated and flocculated solids to form a mixture of dewatered solids and filtrate water; and recycling the filtrate water into the mixed liquor and a method of controlling polymer dosage, preferably using fluorescence emission spectroscopy.

Method of using high molecular weight water soluble polymers in membrane bioreactor systems

Method of using water soluble cationic polymers in membrane biological reactors

A method to enhance brightness in Chemical and Mechanical bleached pulps comprising adding an organic sulfide chelant to the Chemical and Mechanical pulp.

Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent

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Glen Ellyn, IL, United States of America

Kristine S Salmen