Blume, W. J. -  MacroTech Inc.; P. C.  Fraleigh - The University of Toledo;  W. R. Van Cott - City of Toledo, Division of Water.  Evaluation of Copper Ions and Aluminum Floc for Preventing Settlement of Zebra Mussels.

Proceedings of The Fourth International Zebra Mussel Conference, Madison, Wisconsin, March 1994

Evaluation of Copper Ions and Aluminum Floc for Preventing Settlement of Zebra Mussels

Abstract
The controlled electrolytic dissolution of copper and aluminum anodes to inhibit macrofouling in seawater intakes and piping systems has been employed for over 30 years. It was on this basis that we undertook development of this proven macrofouling control technology for preventing settlement of zebra mussels at the post-veliger stage.

The authors discuss the results of field evaluation conducted during the Summer 1993 at the City of Toledo's intake structure, which is located 2.9 miles offshore in Lake Erie. The copper and aluminum ions were electrolytically generated by specially designed cells supplied by MacroTech Inc.

Field testing was performed by Dr. Fraleigh. The test set-up consisted of 24 flow-thru bioboxes being fti by raw lake water. The bioboxes were divided among untreated, copper aluminum at several concentrations, and copper only at several concentrations.

Weekly ambient veliger counts were taken and a slide from each biobox was removed for mussels settlement count. Chemical analyses were performed weekly by the City of Toledo.

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Keywords: Chemical_control, Industry, Prevention, Zebra_mussel
Product Type: Publication, Proceedings
User Type: Industrial_and_Municipal