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Development of Process Control Equations to Support Detoxification of Copper Using Natural Humate Amendments.

DE2009960213

Publication Date	2009
Personal Author	Looney, B. B.; Millings, M. R.
Page Count	26
Abstract	Robust control equations are needed to support implementation of an innovative copper detoxification process to assure that water discharged to the H-12 Outfall is protective of the ecology in the receiving stream. The equations, based on the EPA Biotic Ligand Model (BLM), establish the amount of humate amendment to achieve ecosystem protection goals. Humate binds and detoxifies copper; the amount of amendment needed is a function of pH and outfall flow. After analyzing a variety of options, we developed a polynomial equation, using hydrogen ion concentration as the independent variable, to determine target amendment concentration. This polynomial provides good performance over a wide pH range and was superior to various alternatives. When mathematically combined with measured outfall flow rate and the specific measured properties of various brands of potential amendments, the polynomial provides for high-quality and realtime process control. The final-combined equation is suitable for use by an industry standard programmable logic controller (PLC), so that data from sensors may be used to modulate the amendment delivery/dosing pump.
Keywords	Copper Detoxification Process control Water quality Water pollution Streams Water flow Ecology Ligands Aquatic ecosystems Hydrogen Water chemistry Toxicity Mathematical models Natural humate amendments
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Savannah River National Lab., Aiken, SC.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	201001
Contract Number	DE-AC09-08SR22470

Development of Process Control Equations to Support Detoxification of Copper Using Natural Humate Amendments.

Development of Process Control Equations to Support Detoxification of Copper Using Natural Humate Amendments.
DE2009960213

Publication Date	2009
Personal Author	Looney, B. B.; Millings, M. R.
Page Count	26
Abstract	Robust control equations are needed to support implementation of an innovative copper detoxification process to assure that water discharged to the H-12 Outfall is protective of the ecology in the receiving stream. The equations, based on the EPA Biotic Ligand Model (BLM), establish the amount of humate amendment to achieve ecosystem protection goals. Humate binds and detoxifies copper; the amount of amendment needed is a function of pH and outfall flow. After analyzing a variety of options, we developed a polynomial equation, using hydrogen ion concentration as the independent variable, to determine target amendment concentration. This polynomial provides good performance over a wide pH range and was superior to various alternatives. When mathematically combined with measured outfall flow rate and the specific measured properties of various brands of potential amendments, the polynomial provides for high-quality and realtime process control. The final-combined equation is suitable for use by an industry standard programmable logic controller (PLC), so that data from sensors may be used to modulate the amendment delivery/dosing pump.
Keywords	Copper Detoxification Process control Water quality Water pollution Streams Water flow Ecology Ligands Aquatic ecosystems Hydrogen Water chemistry Toxicity Mathematical models Natural humate amendments
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Savannah River National Lab., Aiken, SC.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	201001
Contract Number	DE-AC09-08SR22470