Steven B Valine

US Patent:

53038711, Apr 19, 1994

Filed:

May 14, 1992

Appl. No.:

7/882664

Inventors:

George F. Bateson - Fridley MN
Dennis D. Chilcote - Hibbing MN
Michael M. Martinson - Mound MN
Steven B. Valine - Elma NY
Aldolfo R. Zambrano - Chanhassen MN

Assignee:

Biotrol, Incorporated - Eden Prairie MN

International Classification:

B02C 2318

US Classification:

241 20

Abstract:

A process for the purification of soil contaminated with organic material is provided. The preferred process generally involves superposed attrition and classification processes, which lead to removal and concentration of highly contaminated fractions. The process may also include a step of flotation whereby hydrophobic materials in the soil are released to an interface with air bubbles, and are floated to the top of a flotation cell. In preferred processes according to the present invention, soil to be treated is extracted from a contaminated site, and is broken into relatively small particles. These particles are preferably treated in attrition and classification steps, to remove fine, slow settling contaminated materials such as wood and fine soil materials. The resulting isolated coarser materials are then treated by flotation for a final polishing step. The process is particularly well adapted for use in treating soils contaminated with oil and grease materials containing PCP therein, from wood treatment plants or the like.

US Patent:

51159864, May 26, 1992

Filed:

Aug 24, 1989

Appl. No.:

7/398082

Inventors:

George F. Bateson - Roseville MN
Dennis D. Chilcote - Hibbing MN
Michael M. Martinson - Mound MN
Steven B. Valine - Carver MN
Adolfo R. Zambrano - Hibbing MN

Assignee:

BioTrol, Inc - Chaska MN

International Classification:

B02C 2318

US Classification:

241 20

Abstract:

A process for the purification of soil contaminated with organic material is provided. The preferred process generally involves superposed attrition and classification processes, which lead to removal and concentration of highly contaminated fractions. The process may also include a step of flotation whereby hydrophobic materials in the soil are released to an interface with air bubbles, and are floated to the top of a flotation cell. In preferred processes according to the present invention, soil to be treated is extracted from a contaminated site, and is broken into relatively small particles. These particles are preferably treated in attrition and classification steps, to remove fine, slow settling contaminated materials such as wood and fine soil materials. The resulting isolated coarser materials are then treated by flotation for a final polishing step. The process is particularly well adapted for use in treating soils contaminated with oil and grease materials containing PCP therein, from wood treatment plants or the like.

US Patent:

49231251, May 8, 1990

Filed:

Aug 2, 1989

Appl. No.:

7/388748

Inventors:

George F. Bateson - Roseville MN
Dennis D. Chilcote - Hibbing MN
Michael M. Martinson - Mound MN
Steven B. Valine - Carver MN
Adolfo R. Zambrano - Hibbing MN

Assignee:

BioTrol, Inc. - Chaska MN

International Classification:

B02C 2318

US Classification:

241 20

Abstract:

A process for the purification of soil contaminated with organic material is provided. The preferred process generally involves superposed attrition and classification processes, which lead to removal and concentration of highly contaminated fractions. The process may also include a step of flotation whereby hydrophobic materials in the soil are released to an interface with air bubbles, and are floated to the top of a flotation cell. In preferred processes according to the present invention, soil to be treated is extracted from a contaminated site, and is broken into relatively small particles. These particles are preferably treated in attrition and classification steps, to remove fine, slow settling, contaminated materials such as wood and fine soil materials. The resulting isolated coarser materials are then treated by flotation for a final polishing step. The process is particularly well adapted for use in treating soils contaminated with oil and grease materials containing PCP therein, from wood treatment plants of the like.