US4013555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing BOD in food processing plant wastes
Assignee: ChampionX LLC
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Filing: 1976-03-24
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Granted: 1977-03-22
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Expires: 1996-03-24
Abstract
Abstract A process for reducing BOD in aqueous food processing plant wastes which comprises subjecting such wastes to the following series of sequential steps: A. adjusting the pH of the waste to 3 or less to form finely divided suspended particles; B. readjusting the pH of the waste with sodium aluminate to a value within the range of 6-7.5; C. flocculating the particles with an anionic acrylamide polymer; and then D. removing and collecting the flocculated particles from the food processing plant wastes.
Inventors
- 👤 William R. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:43
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/66; C02F1/52; C02F1/5236; C02F1/54
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A process for reducing BOD in the form of soluble proteinaceous material in aqueous food processing plant wastes which comprises subjecting such wastes to the following series of sequential steps: A. adjusting the pH of the waste to 3 or less to form finely divided suspended particles; B. readjusting the pH of the waste with sodium aluminate to a value within the range of 6- 7.5; C. flocculating the particles with an anionic acrylamide polymer; and then D. removing and collecting the flocculated particles from the food processing plant wastes.
Claim 2
Dependent Claim
90 words
A process for reducing BOD in the form of soluble proteinaceous material in aqueous food processing plant wastes which comprises subjecting such wastes to the following series of sequential steps: A. adjusting the pH of the waste to 3 or less to form finely divided suspended particles; B. readjusting the pH of the waste with sodium aluminate to a value within the range of 6- 7.5; C. flocculating the particles with an anionic acrylamide polymer; and then D. removing and collecting the flocculated particles from the food processing plant wastes.
Claim 3
Dependent Claim
39 words
The process of claim 1 where the pH in Step A is adjusted to 2.5, and pH in Step B is adjusted between the range of 6.5- 7, and the anionic acrylamide polymer is a 30% sodium acrylate-acrylamide polymer.
References Cited (Backward Citations)
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GB816399A
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US3142638A
Cited
US3342742A
Cited
US3624019A
Cited
US3801501A
Cited
US3966600A
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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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |