Patent US3973043A successfully refreshed from Google Patents.
US3973043A
Expired / Lapsed
US
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Feedlot animal wastes into useful materials
Assignee: Individual
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Filing: 1975-07-31
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Granted: 1976-08-03
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Expires: 1995-07-31
Abstract
Abstract A method for converting feedlot fecal waste materials into methane and animal feed is disclosed. In the disclosed method, the feedlot fecal waste materials are collected, combined with water to form a slurry and the slurry is thereafter subjected to an anaerobic fermentation process. The anaerobic fermentation process is carried out under conditions such that a methane rich gas is formed which can be collected and utilized as an energy source. The liquid residue material from the anaerobic fermentation step is thereafter subjected to an aerobic fermentation process to produce a protein rich material that can be utilized as an animal feed. The liquid residue remaining from the aerobic fermentation process can be utilized as a fertilizer material.
Inventors
- 👤 Howard D. Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
A; A23; A23K; A23K10/00; A23K10/30; A23K10/37; A23K10/10; A23K10/12; Y; Y02; Y02E; Y02E50/00; Y02E50/30; Y02P; Y02P60/00; Y02P60/80; Y02P60/87; Y10; Y10S; Y10S426/00; Y10S426/807; Y10S435/00; Y10S435/813; Y10S435/819
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
102 words
A process for converting feedlot fecal waste materials having indigenous microorganisms contained therein into useful materials which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; b. subjecting said slurry to an anaerobic fermentation process for a period of time to produce a methane containing gas and a first residue material; c. separating said methane containing gas from said first residue material; d. thereafter subjecting said first residue material to an aerobic fermentation to produce an edible animal feed and a second residue material; and e. separating said animal feed from said second residue material.
Claim 2
Dependent Claim
102 words
A process for converting feedlot fecal waste materials having indigenous microorganisms contained therein into useful materials which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; b. subjecting said slurry to an anaerobic fermentation process for a period of time to produce a methane containing gas and a first residue material; c. separating said methane containing gas from said first residue material; d. thereafter subjecting said first residue material to an aerobic fermentation to produce an edible animal feed and a second residue material; and e. separating said animal feed from said second residue material.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein said anaerobic fermentation process is carried out at a temperature of from about 65°F to about 110°F.
Claim 4
Dependent Claim
24 words
The process of claim 2 wherein said anaerobic fermentation process is carried out within a pH range of from about 6.2 to about 7.4.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein said aerobic fermentation is initiated by the addition of a culture of a pre-selected strain of algae or bacteria.
Claim 6
Dependent Claim
140 words
A process for converting feedlot fecal waste materials having indigenous microorganisms contained therein into useful materials which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; b. subjecting said slurry to an anaerobic fermentation process at a temperature of from about 65°F to about 110°F, at a pH from about 6.2 to about 7.4, with the potassium to sodium plus calcium plus magnesium atomic ratio of from about 1.05:1 to about 1.15:1 and for a period of time to produce a methane containing gas and a first residue material; c. separating said methane containing gas from said first residue material; d. thereafter subjecting said first residue material to an aerobic fermentation to produce an edible animal feed and a second residue material; and e. separating said animal feed from said second residue material.
Claim 7
Dependent Claim
140 words
A process for converting feedlot fecal waste materials having indigenous microorganisms contained therein into useful materials which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; b. subjecting said slurry to an anaerobic fermentation process at a temperature of from about 65°F to about 110°F, at a pH from about 6.2 to about 7.4, with the potassium to sodium plus calcium plus magnesium atomic ratio of from about 1.05:1 to about 1.15:1 and for a period of time to produce a methane containing gas and a first residue material; c. separating said methane containing gas from said first residue material; d. thereafter subjecting said first residue material to an aerobic fermentation to produce an edible animal feed and a second residue material; and e. separating said animal feed from said second residue material.
Claim 8
Dependent Claim
22 words
The process of claim 5 wherein said aerobic fermentation process is carried out at a temperature of about 65°F to about 90°F.
Claim 9
Dependent Claim
22 words
The process of claim 6 wherein said aerobic fermentation process is carried out at a pH of about 7 to about 8.
Claim 10
Dependent Claim
13 words
The process of claim 7 wherein said edible animal feed is substantially algae.
Claim 11
Dependent Claim
18 words
The process of claim 8 wherein said algae is separated from said second residue material by froth flotation.
Claim 12
Dependent Claim
20 words
The process of claim 8 wherein said aerobic fermentation process is carried out in the presence of added carbon dioxide.
Claim 13
Dependent Claim
25 words
The process of claim 10 wherein at least a portion of said carbon dioxide is obtained from said gas produced in said anaerobic fermentation process.
Claim 14
Dependent Claim
13 words
The process of claim 7 wherein said edible cattle feed is substantially bacteria.
Claim 15
Dependent Claim
18 words
The process of claim 12 wherein said bacteria is separated from said second residue material by froth flotation.
Claim 16
Independent Claim
71 words
A method for treating feedlot fecal waste materials having indigenous microorganisms contained therein which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; and b. subjecting said slurry to an anaerobic fermentation process in the presence of added nitrogen gas for a period of time to produce a material having a carbon to nitrogen ratio less than that of said feedlot fecal waste materials.
Claim 17
Independent Claim
71 words
A method for treating feedlot fecal waste materials having indigenous microorganisms contained therein which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; and b. subjecting said slurry to an anaerobic fermentation process in the presence of added nitrogen gas for a period of time to produce a material having a carbon to nitrogen ratio less than that of said feedlot fecal waste materials.
Claim 18
Dependent Claim
23 words
The process of claim 14 wherein said anaerobic fermentation process is carried out at a temperature of from about 65°F to about 110°F.
Claim 19
Dependent Claim
24 words
The process of claim 15 wherein said anaerobic fermentation process is carried out within a pH range of from about 6.2 to about 7.4.
Claim 20
Independent Claim
108 words
A method for treating feedlot fecal waste materials having indigenous microoganisms contained therein which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; and b. subjecting said slurry to an anaerobic fermentation process in the presence of added nitrogen at a temperature of from about 65°F to about 110°F at a pH of from about 6.2 to 7.4, with a potassium to sodium plus calcium plus magnesium atomic ratio of from about 1.05:1 to about 1.15:1 and for a period of time to produce a material having a carbon to nitrogen ratio less than that of said feedlot fecal waste materials.
Claim 21
Independent Claim
108 words
A method for treating feedlot fecal waste materials having indigenous microoganisms contained therein which comprises: a. collecting said feedlot fecal waste materials and adding water thereto to form a slurry; and b. subjecting said slurry to an anaerobic fermentation process in the presence of added nitrogen at a temperature of from about 65°F to about 110°F at a pH of from about 6.2 to 7.4, with a potassium to sodium plus calcium plus magnesium atomic ratio of from about 1.05:1 to about 1.15:1 and for a period of time to produce a material having a carbon to nitrogen ratio less than that of said feedlot fecal waste materials.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |