US4554002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiating waste sludges for agricultural use and product made thereby
Assignee: N Viro International Corp
•
Filing: 1983-05-16
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Granted: 1985-11-19
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Expires: 2003-05-16
Abstract
Abstract A method of beneficiating waste sludge which comprises mixing kiln dust with waste sludge, exposing the mixture at ambient temperature without compacting for a time sufficient to produce a disintegratable, friable product which can be applied to land as a soil conditioner.
Inventors
- 👤 John P. Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:44
CPC Classifications
C; C05; C05F; C05F7/00; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/20; Y10; Y10S; Y10S106/00; Y10S106/01; Y10S588/00; Y10S588/901
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
101 words
The method of beneficiating waste water sludge to reduce the pathogens which comprises: mixing weeds sludge and kiln dust to form a mixture, the mixture comprising from about 10% to about 30% kiln dust by weight and from about 90% to about 70% waste water sludge by weight, the amount of kiln dust being sufficient to raise the pH of the mixture to at least 12 and to maintain the pH of the mixture to at least 12 for at least two hours, and permitting the mixture with a pH of at least 12 to interact for at least two hours.
Claim 2
Independent Claim
101 words
The method of beneficiating waste water sludge to reduce the pathogens which comprises: mixing weeds sludge and kiln dust to form a mixture, the mixture comprising from about 10% to about 30% kiln dust by weight and from about 90% to about 70% waste water sludge by weight, the amount of kiln dust being sufficient to raise the pH of the mixture to at least 12 and to maintain the pH of the mixture to at least 12 for at least two hours, and permitting the mixture with a pH of at least 12 to interact for at least two hours.
Claim 3
Dependent Claim
25 words
The method set forth in claim 1 wherein said kiln dust is selected from the group consisting of cement kiln dust and lime kiln dust.
Claim 4
Dependent Claim
46 words
The method set forth in claim 2 including controlling the amount of kiln dust and exposing the mixture at ambient temperature without compacting for a time sufficient to produce a disintegratable, friable product which can be applied to land as a soil conditioner and partial fertilizer.
Claim 5
Dependent Claim
23 words
The method set forth in claim 3 including the step of breaking the resultant product to a generally uniform product of small particles.
Claim 6
Dependent Claim
29 words
The method set forth in claim 2 including the step of adding a caustic compound to the mixture in an amount not to exceed 15% of the kiln dust.
Claim 7
Dependent Claim
27 words
The method set forth in claim 2 including the step of adding dolomitic limestone to the mixture in an amount sufficient to supply magnesium to the soil.
Claim 8
Dependent Claim
18 words
The method set forth in claim 2 including the step of partially substituting fly ash for kiln dust.
Claim 9
Dependent Claim
17 words
The method set forth in claim 2 wherein the waste water sludge comprises waste water treatment sludge.
Claim 10
Dependent Claim
15 words
The method set forth in claim 2 wherein the waste water sludge comprises animal waste.
Claim 11
Dependent Claim
15 words
The method set forth in claim 1 wherein said kiln dust comprises cement kiln dust.
Claim 12
Dependent Claim
25 words
The method set forth in claim 10 wherein said mixture comprises about 30% cement kiln dust by weight and about 70% waste sludge by weight.
Claim 13
Dependent Claim
11 words
The product made in accordance with the method of claim 1.
Claim 14
Dependent Claim
25 words
The product set forth in claim 12 wherein the kiln dust is selected from the group consisting of cement kiln dust and lime kiln dust.
Claim 15
Dependent Claim
16 words
The product set forth in claim 13 wherein fly ash is partially substituted for kiln dust.
Claim 16
Dependent Claim
27 words
The product set forth in claim 13 wherein said product includes a caustic material in an amount not more than 15% by weight of the kiln dust.
Claim 17
Dependent Claim
16 words
The product set forth in claim 13 wherein the waste sludge comprises waste water treatment sludge.
Claim 18
Dependent Claim
14 words
The product set forth in claim 13 wherein the waste sludge comprises aniimal waste.
Claim 19
Dependent Claim
15 words
The product set forth in claim 12 wherein said kiln dust comprises cement kiln dust.
Claim 20
Dependent Claim
25 words
The product set forth in claim 18 wherein said mixture comprises about 30% cement kiln dust by weight and about 70% waste sludge by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |