US4402831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effluent treatment
Assignee: Avecia Ltd
•
Filing: 1982-03-10
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Granted: 1983-09-06
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Expires: 2002-03-10
Abstract
Abstract Cyanide degrading fungi are grown in the mycalial form. The mycelium is then immobilized and the immobilized mycelium used to degrade cyanide ion in cyanide containing effluents. At least 95% of the cyanide ion is degraded.
Inventors
- 👤 Andrew J. Beardsmore
- 👤 Keith A. Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:42
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F3/34; C12; C12N; C12N9/00; C12N9/88; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A process for the degradation of inorganic cyanides in effluents comprising contacting an effluent containing cyanide ions at a concentration of at least 50 mM with a fungal mycelium, that has been immobilised by flocculation or entrapment and in which cyanide hydratase has been induced, for sufficient time to degrade at least 95% of the cyanide ions in the effluent, said fungal mycelium being a mycelium of a fungus selected from Stemphylium loti, Mycoleptodiscus terrestris, Fusarium moniliforme, Helminthosporium sorghicola, and Gloecercospora sorghi.
Claim 2
Dependent Claim
82 words
A process for the degradation of inorganic cyanides in effluents comprising contacting an effluent containing cyanide ions at a concentration of at least 50 mM with a fungal mycelium, that has been immobilised by flocculation or entrapment and in which cyanide hydratase has been induced, for sufficient time to degrade at least 95% of the cyanide ions in the effluent, said fungal mycelium being a mycelium of a fungus selected from Stemphylium loti, Mycoleptodiscus terrestris, Fusarium moniliforme, Helminthosporium sorghicola, and Gloecercospora sorghi.
Claim 3
Dependent Claim
30 words
A process according to claim 1 wherein the immobilised fungal mycelium is obtained by adding a polyelectrolyte flocculating agent to a fungal mycelium in which cyanide hydratase has been induced.
Claim 4
Dependent Claim
40 words
A process according to claim 1 wherein the immobilised fungal mycelium is obtained by adding a mixture of the fungal mycelium, in which cyanide hydratase has been induced, and a solution of an aliginate to a precipitant for the alginate.
Claim 5
Dependent Claim
18 words
A process according to claim 2 or claim 3 in which the effluent is treated at 0°-30° C.
Claim 6
Dependent Claim
17 words
A process according to claim 1 in which the effluent is treated at a pH of 7-10.
Claim 7
Dependent Claim
27 words
A process according to claim 1 in which the effluent is treated for sufficient time to degrade at least 98% of the cyanide ions in the effluent.
References Cited (Backward Citations)
US3926795A
Cited
US3940332A
Cited
GB2006741A
Cited
JPS5471856A
Cited
GB2025919A
Cited
US4321327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |