Patent US4478683A successfully refreshed from Google Patents.
US4478683A
Expired / Lapsed
US
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Enzymatic catalyzed biocide system
Assignee: Westvaco Corp
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Filing: 1982-09-27
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Granted: 1984-10-23
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Expires: 2002-09-27
Abstract
Abstract A method of killing and inhibiting the growth of microorganisms in industrial process streams comprises the addition of an enzymatically catalyzed biocide system utilizing a microbial or plant dehydrogenase enzyme such as peroxidase or laccase in the presence of an oxidant such as hydrogen peroxide or oxygen to oxidize phenolic compounds found in or added to the process streams to produce oxidation products that are toxic to microorganisms.
Inventors
- 👤 Steve A. Orndorff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:07
CPC Classifications
A; A01; A01N; A01N63/00; D; D21; D21C; D21C5/00; D21C5/005; Y; Y10; Y10S; Y10S210/00; Y10S210/928; Y10S435/00; Y10S435/80
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method for enzymatically killing and controlling the growth of microorganisms in an industrial process wastewater stream comprising: (a) adding to the stream an effective amount of a plant or microbial dehydrogenase enzyme selected from the group consisting of peroxidase and laccase; (b) adding to the stream an oxidant selected from the group consisting of oxygen and hydrogen peroxide; (c) adding to the stream a sufficient quantity of an oxidizable monophenolic compound selected from the group consisting of black liquor, catechol, guaiacol, resorcinal and lignin to achieve the desired kill and control; and, (d) reacting the dehydrogenase enzyme and oxidant in the stream to produce a catalytic oxidation of the monophenolic compound thereby producing quinone and hydroquinone derivatives that are toxic to the microorganisms in the stream.
Claim 2
Independent Claim
127 words
A method for enzymatically killing and controlling the growth of microorganisms in an industrial process wastewater stream comprising: (a) adding to the stream an effective amount of a plant or microbial dehydrogenase enzyme selected from the group consisting of peroxidase and laccase; (b) adding to the stream an oxidant selected from the group consisting of oxygen and hydrogen peroxide; (c) adding to the stream a sufficient quantity of an oxidizable monophenolic compound selected from the group consisting of black liquor, catechol, guaiacol, resorcinal and lignin to achieve the desired kill and control; and, (d) reacting the dehydrogenase enzyme and oxidant in the stream to produce a catalytic oxidation of the monophenolic compound thereby producing quinone and hydroquinone derivatives that are toxic to the microorganisms in the stream.
Claim 3
Independent Claim
134 words
A method for enzymatically killing and controlling the growth of microorganisms in an industrial process wastewater stream by the catalytic oxidation of monophenolic compounds added to or naturally occurring in the stream comprising: (a) adding to the stream an effective amount of a plant or microbial dehydrogenase enzyme selected from the group consisting of peroxidase and laccase; (b) adding to the stream an oxidant selected from the group consisting of oxygen and hydrogen peroxide; (c) adding to the stream a sufficient quantity of an ozidizable monophenolic compound selected from the group consisting of black liquor, catechol, guaiacol, resorcinol and lignin to achieve the desired kill and control; and, (d) reacting the ingredients to produce quinone and hydroquinone reaction products in situ within the wastewater stream which are toxic to the microorganisms in the stream.
Claim 4
Independent Claim
134 words
A method for enzymatically killing and controlling the growth of microorganisms in an industrial process wastewater stream by the catalytic oxidation of monophenolic compounds added to or naturally occurring in the stream comprising: (a) adding to the stream an effective amount of a plant or microbial dehydrogenase enzyme selected from the group consisting of peroxidase and laccase; (b) adding to the stream an oxidant selected from the group consisting of oxygen and hydrogen peroxide; (c) adding to the stream a sufficient quantity of an ozidizable monophenolic compound selected from the group consisting of black liquor, catechol, guaiacol, resorcinol and lignin to achieve the desired kill and control; and, (d) reacting the ingredients to produce quinone and hydroquinone reaction products in situ within the wastewater stream which are toxic to the microorganisms in the stream.
Claim 5
Dependent Claim
35 words
The method of claim 2 wherein the quantity of enzyme and oxidant added to the wastewater stream is sufficient to oxidize all of the monophenolic oxidizable compound material naturally occurring or added to the stream.
Claim 6
Dependent Claim
26 words
The method of claim 3 wherein the wastewater stream may have a pH of from about 4-11 and a temperature of from about 10-60 degrees C.
Claim 7
Dependent Claim
17 words
The method of claim 4 wherein the dehydrogenase enzyme is peroxidase and the oxidant is hydrogen peroxide.
Claim 8
Dependent Claim
16 words
The method of claim 4 wherein the dehydrogenase enzyme is laccase and the oxidant is oxygen.
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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |