Patent US4687574A successfully refreshed from Google Patents.
US4687574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment system
Assignee: Munters Corp
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Filing: 1985-03-11
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Granted: 1987-08-18
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Expires: 2005-03-11
Abstract
Abstract A mobile water treatment plant capable of handling a high volume of sewage confined within the dimensions of a conventional truck-hauled container comprises: (1) a screen to separate gross solids from liquids; (2) a holding chamber between features 1 and 2 in which the liquid is aerated; (3) a flocculating chamber for the liquid; (4) a lamellar separator (bottom fed with intermediate auxillary lamellae extending 1/2 to 1/3 of the length of the main lamellae); and (5) treatment of the water from the lamellar separator with "activated oxygen" as described and claimed in U.S. Pat. No. 4,214,962. A preferred subsidiary feature is to recycle a controlled amount of the sludge separated at point 1 to the holding tank.
Inventors
- 👤 Goran Hellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:04
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1215; B; B01; B01D; B01D21/00; C02F3/04; C02F3/1236; C02F3/1242; C02F1/00; C02F1/30; C02F1/32; C02F1/72; C02F1/74; C02F1/76; C02F2203/00; C02F2203/008; C02F2303/00; C02F2303/04; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
209 words
A portable water treatment system comprising: means for introducing wastewater including gross solids and liquid into the system; means for separating the gross solids from the liquid in the wastewater, said separating means producing a sludge from the gross solids; means for storing and aerating the liquid; means for flocculating the aerated liquid, the flocculating means including means for introducing a chemical flocculating agent into the aerated liquid and means for stirring the aerated liquid and the chemical flocculating agent; means for sedimenting and clarifying the flocculated liquid, said sedimenting and clarifying means having a plurality of lamellae, said sedimenting and clarifying means producing a sediment and a clarified liquid; means for disinfecting the clarified liquid; means for digesting the sludge, said sludge digesting means producing a supernatant liquid from the sludge; means for introducing the supernatant liquid from the sludge digesting means into the storing and aerating means; and means for introducing the sediment from the sedimenting and clarifying means into the sludge digesting means; wherein the chemical flocculating agent is introduced into the aerated liquid in a first chamber, wherein the chemical flocculating agent and the aerated liquid in the first chamber are supplied to a second chamber, and wherein the second chamber contains the stirring means.
Claim 2
Dependent Claim
209 words
A portable water treatment system comprising: means for introducing wastewater including gross solids and liquid into the system; means for separating the gross solids from the liquid in the wastewater, said separating means producing a sludge from the gross solids; means for storing and aerating the liquid; means for flocculating the aerated liquid, the flocculating means including means for introducing a chemical flocculating agent into the aerated liquid and means for stirring the aerated liquid and the chemical flocculating agent; means for sedimenting and clarifying the flocculated liquid, said sedimenting and clarifying means having a plurality of lamellae, said sedimenting and clarifying means producing a sediment and a clarified liquid; means for disinfecting the clarified liquid; means for digesting the sludge, said sludge digesting means producing a supernatant liquid from the sludge; means for introducing the supernatant liquid from the sludge digesting means into the storing and aerating means; and means for introducing the sediment from the sedimenting and clarifying means into the sludge digesting means; wherein the chemical flocculating agent is introduced into the aerated liquid in a first chamber, wherein the chemical flocculating agent and the aerated liquid in the first chamber are supplied to a second chamber, and wherein the second chamber contains the stirring means.
Claim 3
Dependent Claim
27 words
A portable water treatment system as recited in claim 1, further comprising means for filtering the clarified liquid, wherein said disinfecting means disinfects the filtered, clarified liquid.
Claim 4
Dependent Claim
18 words
A portable water treatment system as recited in claim 1, further comprising means for filtering the disinfected liquid.
Claim 5
Dependent Claim
21 words
A portable water treatment system as recited in claim 1, wherein the disinfecting means includes means for chlorinating the clarified liquid.
Claim 6
Dependent Claim
24 words
A portable water treatment system as recited in claim 1, wherein the disinfecting means includes means for treating the clarified liquid with activated oxygen.
Claim 7
Dependent Claim
31 words
A portable water treatment system as recited in claim 5, wherein the activated oxygen is obtained by irradiating oxygen with electromagnetic radiation at a wavelength of less than approximately 200 nanometers.
Claim 8
Dependent Claim
31 words
A portable water treatment system as recited in claim 6, wherein the activated oxygen is obtained by irradiating oxygen with electromagnetic radiation at a wavelength of less than approximately 155 nanometers.
Claim 9
Dependent Claim
21 words
A portable water treatment system as recited in claim 1, wherein the stirring means includes a plurality of vertically mounted paddles.
Claim 10
Dependent Claim
42 words
A portable water treatment system as recited in claim 1, wherein the first and second chambers are each equipped for the introduction of a chemical flocculating agent, and wherein the first and second chambers each contain a plurality of vertically mounted paddles.
Claim 11
Dependent Claim
27 words
A portable water treatment system as recited in claim 9, wherein the paddles in the first chamber rotate more quickly than the paddles in the second chamber.
Claim 12
Dependent Claim
36 words
A portable water treatment system as recited in claim 1, wherein the lamellae include main and auxiliary lamellae, the auxiliary lamellae extending from approximately one third to approximately one half the height of the main lamellae.
Claim 13
Dependent Claim
30 words
A portable water treatment system as recited in claim 1, wherein the lamellae are disposed at an angle in the range from about 30° to about 60° to the horizontal.
Claim 14
Dependent Claim
143 words
A portable water treatment system as recited in claim 1, wherein the sedimenting and clarifying means includes a package of sedimentation lamellae arranged in parallel and sloping in relation to the horizontal plane, the package being provided with inlet means, located at the lower end of the package and extending along part of the height extension of the package, for introducing a liquid between the lamellae in a flow direction which is substantially parallel to the plane of the lamellae and substantially horizontal, said inlet means being provided with a throat restriction upstream of said point of introduction between the lamellae, said restriction being disposed to produce a venturi effect at said point of introduction thereby accelerating the liquid flow in a direction substantially parallel to the plane of the lamellae and substantially perpendicular to the direction of the flow along the lamellae.
Claim 15
Dependent Claim
183 words
A portable water treatment system comprising: means for introducing wastewater including gross solids and liquid into the system; means for separating the gross solids from the liquid in the wastewater, said separating means producing a sludge from the gross solids; means for storing and aerating the liquid; means for flocculating the aerated liquid, the flocculating means including a trickle bed filter and means for aerating the output of the trickle bed filter, said means for aerating producing an activated sludge; means for sedimenting and clarifying the flocculated liquid, said sedimenting and clarifying means having a plurality of lamellae, said sedimenting and clarifying means producing a sediment and a clarified liquid; means for disinfecting the clarified liquid; means for digesting the sludge, said sludge digesting means producing a supernatent liquid from the sludge; means for introducing the supernatant liquid from the sludge digesting means into the storing and aerating means; and means for introducing the sediment from the sedimenting and clarifying means into the sludge digesting means; wherein the flocculating means further includes means for introducing a chemical flocculating agent into the aerating means.
Claim 16
Dependent Claim
183 words
A portable water treatment system comprising: means for introducing wastewater including gross solids and liquid into the system; means for separating the gross solids from the liquid in the wastewater, said separating means producing a sludge from the gross solids; means for storing and aerating the liquid; means for flocculating the aerated liquid, the flocculating means including a trickle bed filter and means for aerating the output of the trickle bed filter, said means for aerating producing an activated sludge; means for sedimenting and clarifying the flocculated liquid, said sedimenting and clarifying means having a plurality of lamellae, said sedimenting and clarifying means producing a sediment and a clarified liquid; means for disinfecting the clarified liquid; means for digesting the sludge, said sludge digesting means producing a supernatent liquid from the sludge; means for introducing the supernatant liquid from the sludge digesting means into the storing and aerating means; and means for introducing the sediment from the sedimenting and clarifying means into the sludge digesting means; wherein the flocculating means further includes means for introducing a chemical flocculating agent into the aerating means.
Claim 17
Dependent Claim
24 words
A portable water treatment system as recited in claim 14, further comprising means for introducing the activated sludge into the storing and aerating means.
Claim 18
Dependent Claim
36 words
A portable water treatment system as recited in claim 14, further comprising means for digesting the sludge, said digesting means producing a supernatant liquid from the sludge, said digesting means including means for aerating the sludge.
Claim 19
Dependent Claim
22 words
A portable water treatment system as recited in claim 16, further comprising means for introducing the activated sludge into the digesting means.
Claim 20
Dependent Claim
21 words
A portable water treatment system as recited in claim 16, further comprising means for introducing the sediment into the digesting means.
References Cited (Backward Citations)
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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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |