David J Hunniford

US Patent:

7087172, Aug 8, 2006

Filed:

Nov 4, 2003

Appl. No.:

10/700381

Inventors:

David J. Hunniford - Sarasota FL, US
David L. Morano - Sarasota FL, US
James Paul Harshman - Bradenton FL, US

Assignee:

USFilter Corporation - Warrendale PA

International Classification:

C02F 3/00

US Classification:

210610, 210739, 210743

Abstract:

A method and apparatus for treating wastewater streams by adding, either separately or as a mixture, a nitrate containing compound and an alkaline material in an amount sufficient to achieve a lower concentration of atmospheric hydrogen sulfide and dissolved sulfides downstream of the addition as compared to the atmospheric hydrogen sulfide and dissolved sulfides present in the wastewater stream prior to the addition. By adding alkaline material in addition to a nitrate containing compounds, the amount of nitrate containing compound added can be reduced by at least 10% as compared to the amount of nitrate that would theoretically need to be added in the absence of alkaline material to achieve a comparable lower concentration of atmospheric hydrogen sulfide and dissolved sulfides in the wastewater stream.

US Patent:

7138049, Nov 21, 2006

Filed:

Jul 7, 2005

Appl. No.:

11/176764

Inventors:

David J. Hunniford - Sarasota FL, US
David L. Morano - Sarasota FL, US
James Paul Harshman - Bradenton FL, US

Assignee:

USFilter Corporation - Warrendale PA

International Classification:

C02F 3/00
B01D 21/30

US Classification:

210143, 210199, 210916

Abstract:

A method and apparatus for treating wastewater streams by adding, either separately or as a mixture, a nitrate containing compound and an alkaline material in an amount sufficient to achieve a lower concentration of atmospheric hydrogen sulfide and dissolved sulfides downstream of the addition as compared to the atmospheric hydrogen sulfide and dissolved sulfides present in the wastewater stream prior to the addition. By adding alkaline material in addition to a nitrate containing compounds, the amount of nitrate containing compound added can be reduced by at least 10% as compared to the amount of nitrate that would theoretically need to be added in the absence of alkaline material to achieve a comparable lower concentration of atmospheric hydrogen sulfide and dissolved sulfides in the wastewater stream.

US Patent:

7186341, Mar 6, 2007

Filed:

Apr 24, 2006

Appl. No.:

11/410173

Inventors:

David J. Hunniford - Sarasota FL, US
David L. Morano - Sarasota FL, US
James Paul Harshman - Bradenton FL, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

C02F 3/00

US Classification:

210610, 210916

Abstract:

A method and apparatus for treating wastewater streams by adding, either separately or as a mixture, a nitrate containing compound and an alkaline material in an amount sufficient to achieve a lower concentration of atmospheric hydrogen sulfide and dissolved sulfides downstream of the addition as compared to the atmospheric hydrogen sulfide and dissolved sulfides present in the wastewater stream prior to the addition. By adding alkaline material in addition to a nitrate containing compounds, the amount of nitrate containing compound added can be reduced by at least 10% as compared to the amount of nitrate that would theoretically need to be added in the absence of alkaline material to achieve a comparable lower concentration of atmospheric hydrogen sulfide and dissolved sulfides in the wastewater stream.

US Patent:

7285207, Oct 23, 2007

Filed:

Jul 7, 2005

Appl. No.:

11/176018

Inventors:

David J. Hunniford - Sarasota FL, US
David L. Morano - Sarasota FL, US
James Paul Harshman - Bradenton FL, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

C02F 3/00

US Classification:

210143, 210739, 210743, 210610

Abstract:

A method and apparatus for treating wastewater streams by adding, either separately or as a mixture, a nitrate containing compound and an alkaline material in an amount sufficient to achieve a lower concentration of atmospheric hydrogen sulfide and dissolved sulfides downstream of the addition as compared to the atmospheric hydrogen sulfide and dissolved sulfides present in the wastewater stream prior to the addition. By adding alkaline material in addition to a nitrate containing compounds, the amount of nitrate containing compound added can be reduced by at least 10% as compared to the amount of nitrate that would theoretically need to be added in the absence of alkaline material to achieve a comparable lower concentration of atmospheric hydrogen sulfide and dissolved sulfides in the wastewater stream.

US Patent:

7326340, Feb 5, 2008

Filed:

Jun 9, 2005

Appl. No.:

11/149018

Inventors:

James Paul Harshman - Bradenton FL, US
David J. Hunniford - Sarasota FL, US
David L. Morano - Sarasota FL, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

C02F 3/00

US Classification:

2101981, 210743, 210739

Abstract:

Systems and methods for reducing odors utilizes oxidation-reduction potential to characterize the quality of water or wastewater and control addition of a species thereto that reduces or inhibits biological sulfide generation. Oxidation-reduction potential is measured at a downstream station and, based on the measurement, a nitrate compound is added at an upstream station to promote inoffensive biological products instead of foul-smelling products.

US Patent:

D3474690, May 31, 1994

Filed:

May 31, 1991

Appl. No.:

7/708624

Inventors:

David J. Hunniford - Sarasota FL

Assignee:

Davis Water & Waste Industries, Inc. - Tallevast FL

US Classification:

D23364

US Patent:

49118439, Mar 27, 1990

Filed:

Dec 9, 1988

Appl. No.:

7/281747

Inventors:

David J. Hunniford - Tallevast FL
H. Forbes Davis - Tallevast FL

Assignee:

Davis Water and Waste Industries, Inc. - Tallevast FL

International Classification:

C02F 300

US Classification:

210610

Abstract:

Removal of dissolved hydrogen sulfide and a reduction in BOD is achieved by the addition of nitrate ions to waste systems in an amount sufficient to stimulate growth of bacteria which utilize dissolved hydrogen sulfide in their metabolism. Specifically, about 2. 4 lbs. oxygen per lb. of sulfide is required.

US Patent:

D3618340, Aug 29, 1995

Filed:

Jan 25, 1994

Appl. No.:

D/017896

Inventors:

David J. Hunniford - Sarasota FL

Assignee:

Davis Water & Waste Industries, Inc. - Tallevast FL

US Classification:

D23364