US3882017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for aeration of biodegradable waste material
Assignee: REN VAND Inc
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Filing: 1974-04-10
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Granted: 1975-05-06
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Expires: 1994-04-10
Abstract
Abstract A method and apparatus for pressure aeration of biodegradable waste material to enhance the rate of degradation of aerobic bacteria. The method involves pressure aeration while in a turbulent state, followed by introduction to a mixing and separating zone, the mixing portion of said zone being separated from the separating portion of said zone by a back pressure creating means, the separating portion of said zone having a gas outlet through which undissolved gases and liquid are discharged and a treated waste material outlet through which aerated or treated waste material is discharged. The method and apparatus achieve 70 to 80 per cent oxygen saturation of the waste material in from a fraction of a second up to a few seconds.
Inventors
- 👤 Norman R Wittrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1278; C02F3/1289; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; C02F3/20; C02F3/26; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
181 words
A METHOD OF PRESSURE AERATION OF BIODEGRADABLE WASTE MATERIAL TO ENHANCE THE RATE OF DEGRADATION BY AEROBIC BACTERIA PRESENT IN THE WASTE MATERIAL, SAID METHOD COMPRISING: INTRODUCING UNDER CONDITIONS OF HIGH VELOCITY A WASTE MATERIAL SLURRY TAKEN FROM A RESERVOIR OF BIODEGRADABLE WASTE MATERIAL INTO A CONFINING ZONE TO CREATE A PRESSURE GREATER THAN ATMOSPHERIC, AND TO CREATE HIGH VELOCITY TURBULENT FLOW, INTRODUCING AIR UNDER PRESSURE INTO SAID CONFINING ZONE TO FURTHER INCREASE TURBULENCE THEREIN AND TO PROVIDE AN AERATED SLURRY, WITHDRAWING THE AERATED SLURRY FROM SAID CONFINING ZONE, AND INTRODUCING SAID AERATED SLURRY INTO A MIXING AND SEPARATING ZONE, HAVING A MIXING AREA AND A SEPARATING AREA WITH SAID MIXING AREA SEPARATED FROM SAID SEPARATING AREA BY A BACK PRESSURE CREATING MEANS, WHEREIN FURTHER TURBYLENT MIXING OCCURS IN SAID MIXING AREA, AND WITHDRAWING FROM SAID SEPARATING AREA AND DISCHARGING DOWNSTREAM OF SAID BACK PRESSURE CREATING MEANS, EXCESS AIR AND UNDISSOLVED GASES FROM SAID SEPARATING AREA, AND DISCHARGING UNDER CONDITIONS OF HIGH VELOCITY SAID AERATED SLURRY FROM SAID SEPARATING AREA INTO SAID RESERVOIR OF SAID WASTE MATERIAL BELOW THE SURFACE THEREOF.
Claim 2
Independent Claim
181 words
A METHOD OF PRESSURE AERATION OF BIODEGRADABLE WASTE MATERIAL TO ENHANCE THE RATE OF DEGRADATION BY AEROBIC BACTERIA PRESENT IN THE WASTE MATERIAL, SAID METHOD COMPRISING: INTRODUCING UNDER CONDITIONS OF HIGH VELOCITY A WASTE MATERIAL SLURRY TAKEN FROM A RESERVOIR OF BIODEGRADABLE WASTE MATERIAL INTO A CONFINING ZONE TO CREATE A PRESSURE GREATER THAN ATMOSPHERIC, AND TO CREATE HIGH VELOCITY TURBULENT FLOW, INTRODUCING AIR UNDER PRESSURE INTO SAID CONFINING ZONE TO FURTHER INCREASE TURBULENCE THEREIN AND TO PROVIDE AN AERATED SLURRY, WITHDRAWING THE AERATED SLURRY FROM SAID CONFINING ZONE, AND INTRODUCING SAID AERATED SLURRY INTO A MIXING AND SEPARATING ZONE, HAVING A MIXING AREA AND A SEPARATING AREA WITH SAID MIXING AREA SEPARATED FROM SAID SEPARATING AREA BY A BACK PRESSURE CREATING MEANS, WHEREIN FURTHER TURBYLENT MIXING OCCURS IN SAID MIXING AREA, AND WITHDRAWING FROM SAID SEPARATING AREA AND DISCHARGING DOWNSTREAM OF SAID BACK PRESSURE CREATING MEANS, EXCESS AIR AND UNDISSOLVED GASES FROM SAID SEPARATING AREA, AND DISCHARGING UNDER CONDITIONS OF HIGH VELOCITY SAID AERATED SLURRY FROM SAID SEPARATING AREA INTO SAID RESERVOIR OF SAID WASTE MATERIAL BELOW THE SURFACE THEREOF.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said excess air and other undissolved gases are discharged to the atmosphere, above the treated sewage material.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein substantially no foam is discharged with said aerated slurry.
Claim 5
Dependent Claim
28 words
The method of claim 1 wherein the aeration achieved by the process is from about 70% to about 80% of the oxygen saturation level of said waste material.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein heat energy created by introducing said waste material into said confining zone is dissipated into said sewage material to increase its average temperature.
Claim 7
Dependent Claim
52 words
The method of claim 1 wherein the velocity and turbulence of said aerated slurry is greater in the confining and conveying zones and in the mixing area of said mixing and separating zone than the velocity and turbulence of said aerated slurry in the separating area of said mixing and separating zone.
Claim 8
Dependent Claim
36 words
The method of claim 1 wherein said aerated slurry is withdrawn from said confining zone and introduced into a conveying zone, and thence withdrawn from said conveying zone and introduced into said mixing and separating zone.
Claim 9
Dependent Claim
25 words
The method of claim 7 wherein the velocity of aerated sewage material in said conveying zone is greater than the velocity in said confining zone.
Claim 10
Dependent Claim
128 words
A WASTE TREATMENT SYSTEM COMPRISING: A PUMP MEANS TO PUMP SEWAGE MATERIAL AT HIGH VELOCITY, A RISER MEANS IN COMMUNICATION WITH SAID PUMP MEANS TO RECEIVE SEWAGE MATERIAL AT HIGH VELOCITY FROM SAID PUMP, AN AIR INTRODUCTION MEANS TO INTRODUCE AIR UNDER CONDITIONS OF PRESSURE AND TURBULENCE INTO SAID RINSER MEANS AND TO AERATE SEWAGE MATERIAL WITHIN SAID RINSER MEANS, A CONVEYING MEANS, A MIXING AND SEPARATING MEANS, SAID CONVEYING MEANS BEING IN COMMUNICATION WITH SAID RISER MEANS AT A FIRST END AND IN COMMUNICATION WITH SAID MIXING AND SEPARATING MEANS AT A SECOND END, SAID MIXING AND SEPARATING MEANS HAVING A MIXING AREA AND A SEPARATING AREA SEPARATED BY A BACK PRESSURE VALVE MEANS, SAID SEPARATING AREA HAVING A GAS DISCHARGE OUTLET AND AN AERATED SEWAGE OUTLET.
Claim 11
Dependent Claim
128 words
A WASTE TREATMENT SYSTEM COMPRISING: A PUMP MEANS TO PUMP SEWAGE MATERIAL AT HIGH VELOCITY, A RISER MEANS IN COMMUNICATION WITH SAID PUMP MEANS TO RECEIVE SEWAGE MATERIAL AT HIGH VELOCITY FROM SAID PUMP, AN AIR INTRODUCTION MEANS TO INTRODUCE AIR UNDER CONDITIONS OF PRESSURE AND TURBULENCE INTO SAID RINSER MEANS AND TO AERATE SEWAGE MATERIAL WITHIN SAID RINSER MEANS, A CONVEYING MEANS, A MIXING AND SEPARATING MEANS, SAID CONVEYING MEANS BEING IN COMMUNICATION WITH SAID RISER MEANS AT A FIRST END AND IN COMMUNICATION WITH SAID MIXING AND SEPARATING MEANS AT A SECOND END, SAID MIXING AND SEPARATING MEANS HAVING A MIXING AREA AND A SEPARATING AREA SEPARATED BY A BACK PRESSURE VALVE MEANS, SAID SEPARATING AREA HAVING A GAS DISCHARGE OUTLET AND AN AERATED SEWAGE OUTLET.
Claim 12
Dependent Claim
34 words
The system of claim 9 wherein an intake opening of restricted size appears between said riser and said conveying means to induce increased pressure and turbulence of the sewage material within said riser means.
Claim 13
Dependent Claim
13 words
The system of claim 9 wherein said air introduction means is a sparger.
Claim 14
Dependent Claim
12 words
The system of claim 9 which is a submerged sewage treatment system.
Claim 15
Dependent Claim
18 words
The system of claim 12 wherein said gas discharge outlet is adapted to discharge gases to the atmosphere.
Claim 16
Dependent Claim
103 words
A waste treatment system comprising; a pump means to pump sewage material at high velocity, a riser means in communication with said pump means to receive sewage material at high velocity from said pump, an air introduction means to introduce air under conditions of pressure and turbulence into said riser means and to aerate sewage material within said riser means, a mixing and separating means in communication with said riser, said mixing and separating means having a mixing area and a separating area separated by a back pressure valve means, said separating area having a gas discharge outlet and an aerated sewage outlet.
Claim 17
Dependent Claim
103 words
A waste treatment system comprising; a pump means to pump sewage material at high velocity, a riser means in communication with said pump means to receive sewage material at high velocity from said pump, an air introduction means to introduce air under conditions of pressure and turbulence into said riser means and to aerate sewage material within said riser means, a mixing and separating means in communication with said riser, said mixing and separating means having a mixing area and a separating area separated by a back pressure valve means, said separating area having a gas discharge outlet and an aerated sewage outlet.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |