Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2005-01-31
2008-12-09
Prince, Fred (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S617000, C210S903000, C210S167220, C119S227000, C119S260000
Reexamination Certificate
active
07462284
ABSTRACT:
The present invention relates to a novel approach for nitrate removal from a marine recirculating system (10) wherein high concentrations of sulfate found in seawater is used in combination with sludge (20) collected from fish growing tanks (12) to promote dissimilatory sulfate reduction to hydrogen sulfide. The sulfide is used as an electron source to promote autotrophic denitrification in an up-flow fix bed bioreactor (16), followed by nitrification in a nitrification unit (14). By utilizing the symbiotic relationship between the sulfate-reducing and sulfide-oxidizing bacterial community, nitrate accumulation is controlled in the recirculating water of the system thereby reducing water exchange in the marine recirculating system.
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Schreier Harold J.
Tal Yossi
Hultquist Steven J.
Intellectual Property / Technology Law
Prince Fred
Reynolds Kelly
University of Maryland Biotechnology Institute
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