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US3931008A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for the treatment of liquid wastes

Assignee: Ilford Imaging Switzerland GmbH
•
Filing: 1974-11-21
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Granted: 1976-01-06
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Expires: 1994-11-21
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Abstract

Abstract An apparatus which is suitable for the treatment of at least two liquid wastes which are chemically not compatible with one another, which comprises an addition zone for the addition of treatment substances to the wastes, a sedimentation zone for the separation of precipitates and liquid and a dilution zone in which the liquid separated off in the sedimentation zone is diluted with water and the liquid diluted in this way is run off, is improved by that, for each of the liquid wastes which are chemically not compatible with one another, separate chambers are provided in the addition zone and in the sedimentation zone, that the addition zone is located lowest in the apparatus, the dilution zone is located above the addition zone and the sedimentation zone is located above the dilution zone, that to each of the chambers of the addition zone there is allotted an inlet for treatment substances which can make the waste in question compatible with the other waste or the other wastes, that each of the chambers of the addition zone is equipped with a pump which on the one hand serves to circulate liquid waste and treatment substance through the particular chamber of the addition zone and on the other hand feeds waste, mixed with treatment substance, into the appropriate chamber of the sedimentation zone, and that in each chamber of the sedimentation zone a filter element is provided through which liquid separated from precipitates flows into the conjoint dilution zone, preferably under the action of gravity.

Inventors

  • 👤 Jean-Claude Page
  • 👤 Armand Rappaz
  • 👤 Ulrich Frauchiger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 22:17
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/31; B; B01; B01D; B01D21/00; B01D21/0012; B01D21/003; B01D21/01; B01D21/02; B01D21/24; B01D21/30; B01D21/34; C; C02; C02F; C02F1/00; C02F1/52; C02F1/5281; C02F2001/007; C02F2101/00; C02F2101/10; C02F2101/20; C02F2103/00; C02F2103/34; C02F2103/40

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 219 words
An apparatus for the treatment of at least two liquid wastes which are chemically incompatible with one another, comprising at least two addition chambers for receiving respective wastes, a common dilution chamber above said addition chambers, at least two sedimentation chambers above said dilution chamber, inlet means for introducing a respective liquid waste into each of said addition members, inlet means for introducing a respective treating substance into each of said addition chambers, at least two pumps each respectively connected with one of said addition chambers, respective pipe means connecting each pump with one of said sedimentation chambers and for recirculating liquid from said one addition chamber back thereto, means for removing sediment from said sedimentation chambers, filter chambers each associated with a respective one of said sedimentation chambers for collection of filtered overflow therein, conduit means for receipt of overflow from said sedimentation chambers and delivery to said common dilution chamber, means for introducing diluent to said dilution chamber, means for withdrawing diluted product from said dilution chamber, and a valved cross-over transfer conduit connecting the filter chamber of one of said sedimentation chambers with another non-respective addition chamber for selective supply of filtered overflow to said other addition chamber, whereby fresh wastes are separately treated, allowed to settle and are then combined for dilution prior to discharge.
Claim 2
Independent Claim 219 words
An apparatus for the treatment of at least two liquid wastes which are chemically incompatible with one another, comprising at least two addition chambers for receiving respective wastes, a common dilution chamber above said addition chambers, at least two sedimentation chambers above said dilution chamber, inlet means for introducing a respective liquid waste into each of said addition members, inlet means for introducing a respective treating substance into each of said addition chambers, at least two pumps each respectively connected with one of said addition chambers, respective pipe means connecting each pump with one of said sedimentation chambers and for recirculating liquid from said one addition chamber back thereto, means for removing sediment from said sedimentation chambers, filter chambers each associated with a respective one of said sedimentation chambers for collection of filtered overflow therein, conduit means for receipt of overflow from said sedimentation chambers and delivery to said common dilution chamber, means for introducing diluent to said dilution chamber, means for withdrawing diluted product from said dilution chamber, and a valved cross-over transfer conduit connecting the filter chamber of one of said sedimentation chambers with another non-respective addition chamber for selective supply of filtered overflow to said other addition chamber, whereby fresh wastes are separately treated, allowed to settle and are then combined for dilution prior to discharge.
Claim 3
Dependent Claim 34 words
An apparatus according to claim 1 further including means for limiting the level of the liquid effluent in each of said addition chambers, which level-limiting means switch the respective circulating pump on or off.
Claim 4
Dependent Claim 33 words
An apparatus according to claim 1 further including a respective supply vessel for each of said treating substances, said vessels being located above said addition chambers so as to feed thereto by gravity.

References Cited (Backward Citations)

US1149045A Cited
US1747803A Cited
US3485749A Cited
US3679053A Cited
US3755156A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-01-05 1979-07-07 1980-01-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-01-05 1983-07-07 1984-01-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-01-05 1987-07-07 1988-01-06 $7700.00 Window Closed / Lapsed

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