Gerald D Nelson

US Patent:

52796370, Jan 18, 1994

Filed:

Oct 23, 1990

Appl. No.:

7/601906

Inventors:

Bart T. Lynam - Edmonds WA
Gerald F. Nelson - Portland OR
David H. Meese - Portland OR
Ronald V. Peterson - Seattle WA
Michael G. Ruby - Seattle WA
Alan White - Portland OR

Assignee:

PCL Environmental Inc. - Bellevue WA
Sludge Management, Inc. - Seattle WA
Riedel Waste Systems, Inc. - Portland OR

International Classification:

C05F 700
C02F 1100

US Classification:

71 12

Abstract:

A method of converting industrial, domestic or other sludge, into a pelletized or granular fertilizer, as well as a sludge converter for practicing the method. The sludge is dewatered to form sludge cake solids which are dried in a dryer, and then sorted with a sorter into a sorted product comprising oversized, undersized, and standard sized product. A portion of the sorted product is recycled for mixing and sizing in a mixer with the dewatered sludge cake solids. To control dust and odors, cyclones and a condenser remove a substantial portion of the gaseous particulate matter and condensable gases from the converter, and any remaining noncondensates are burned in the heat source flame. A waste oil burning heat source supplies heat energy to the dryer. The heat source exhaust gas by-products are filtered in a bag house using a conditioner additive, such as lime or sodium bicarbonate, which may be reclaimed and supplied to the standard sized product to serve as a pelletizing binder, to enhance the fertilizer nutrient value, or to enhance the fertilizer shelf life.

US Patent:

54289068, Jul 4, 1995

Filed:

Jan 5, 1994

Appl. No.:

8/177439

Inventors:

Bart T. Lynam - Edmonds WA
Gerald F. Nelson - Portland OR
David H. Meese - Portland OR
Ronald V. Peterson - Seattle WA
Michael G. Ruby - Seattle WA
Alan White - Portland OR

Assignee:

PCL Environmental, Inc. - Bellevue WA
Sludge Management, Inc. - Seattle WA

International Classification:

F26B 700

US Classification:

34379

Abstract:

A method of converting industrial, domestic or other sludge, into a pelletized or granular fertilizer, as well as a sludge converter for practicing the method. The sludge is dewatered to form sludge cake solids which are dried in a dryer, and then sorted with a sorter into a sorted product comprising oversized, undersized, and standard sized product. A portion of the sorted product is recycled for mixing and sizing in a mixer with the dewatered sludge cake solids. To control dust and odors, cyclones and a condenser remove a substantial portion of the gaseous particulate matter and condensable gases from the converter, and any remaining noncondensates are burned in the heat source flame. A waste oil burning heat source supplies heat energy to the dryer. The heat source exhaust gas by-products are filtered in a bag house using a conditioner additive, such as lime or sodium bicarbonate, which may be reclaimed and supplied to the standard sized product to serve as a pelletizing binder, to enhance the fertilizer nutrient value, or to enhance the fertilizer shelf life.

US Patent:

46402632, Feb 3, 1987

Filed:

Apr 4, 1985

Appl. No.:

6/720031

Inventors:

Gerald C. Nelson - Seattle WA

International Classification:

F23H 1300

US Classification:

126164

Abstract:

A grate for holding a manufactured log (artificial log) has a pair of end supports which are adjustable along a pair of rods passing through the end supports. The log rests near its ends on saddles presented by the end supports and sags into engagement with the rods as it burns.