CA1093227A - Slurry tanks - Google Patents
Slurry tanksInfo
- Publication number
- CA1093227A CA1093227A CA262,681A CA262681A CA1093227A CA 1093227 A CA1093227 A CA 1093227A CA 262681 A CA262681 A CA 262681A CA 1093227 A CA1093227 A CA 1093227A
- Authority
- CA
- Canada
- Prior art keywords
- pipes
- slurry
- tank
- series
- valves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1242—Small compact installations for use in homes, apartment blocks, hotels or the like
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C3/00—Treating manure; Manuring
- A01C3/02—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure
- A01C3/026—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure with mixing or agitating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
- B01F23/23105—Arrangement or manipulation of the gas bubbling devices
- B01F23/2312—Diffusers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental Sciences (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Treatment Of Sludge (AREA)
- Housing For Livestock And Birds (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A slurry tank having a series of pipes mounted therein, each pipe having an outlet in the lower portion of the tank through which air under pressure is fed to agitate and aerate the slurry within the tank. A control mechanism is provided for selectively controlling the supply of air under pressure to each one of the pipes in turn.
A slurry tank having a series of pipes mounted therein, each pipe having an outlet in the lower portion of the tank through which air under pressure is fed to agitate and aerate the slurry within the tank. A control mechanism is provided for selectively controlling the supply of air under pressure to each one of the pipes in turn.
Description
1093;~Z7 This invention relate~ to tanks for conta~ning an-mal excreta and more particularly, to a tank for containing a slurry of animal excrement.
It has been found in conventional slurry tanks that when the slurry remains motionless for a period of time, the slurry tends to ~eparàte out into its liquid and solid constituents, which makes it difficult to remove the ~lurry from the tank. In addition, it has been found that the bacteria in the slurry which improve the nitrogen content thereof, become inactive when the slurry remaIns motionle3s for a period of time.
According to this invention a slurry tank comprises a base having an upwardly projecting wall extending around the periphery thereof, and at lea~t one pipe mounted in the tank, the pipe having at least one outlet aperture adjacent to the base of the tank so that compressed air can be fed through the pipe to emerge from the outlet aperture to agitate and aerate any slurry within the tank.
Prefera~ly, the or each pipe has a single outlet aperture and the or each pipe may extend do~wardly into the tank, the single outlet aperture being provided at or ad~acent to the lower end of the pipe. Preferably, also, a ~on-return valve i~ provided adjacent to the outlet aperture o~ the or each pipe and the or each non-return valve may comprise a pivotally mounted flap. The or each non-return valve may be formed of rubber or a plastics material.
A series of pipes may be provided, the pipes of the series being in fluid communication with each other and it is preferred that there is more than one series of pipes, the `
series being interconnected by a manifold. Preferably, control means is provided for selectively controlling the supply of air from the manifold to one of the series of pipes. The control means may comprise valve means and a timer for supplying air under pressure to one series of pipes for a predetermined period of time and then supplying air under pressure to another or the other series of pipes for a further predetermined period of time.
The flow of air to each series of pipes may be controlled by a motorised valve and each series of pipes may comprise a pair of interconnected pipes, there being a motorised valve connected to each pair of pipes and the motorised valves being mounted on the peripheral wall of the tank.
Each pair of interconnected pipes may diverge as they extend away from the motorised valve and there may be a plurality of pairs of pipes each with an associated motorised valve, the pairs being spaced apart around the peripheral wall of the tank.
Preferably, the or each motorised valve is connected to an air supply and the or each motorised valve may be connected to the same air supply. The air supply may comprise a supply pipe to which is connected a pump.
The timer may initiate the opening and closing of the or each motorised valve.
A preferred embodiment of this invention will now be described, by way of example only, with reference to the accompanying drawings, in which:-~0932Z7 Figure 1 is a plan view of a circular slurry tank, Figure 2 is a side elevation of the slurry tank shown in Figure 1 of the drawings, Figure 3 is a plan view of an alternative circular slurry tank, Figure 4 is a plan view of a further embodiment of a circular slurry tank, Figure 5 is a sectional side elevation of the slurry tank shown in Figure 4 taken on the line V-V, Figure 6 is a plan view of a rectangular slurry tank, and Figure 7 is a detailed perspective view of a motorised valve mounted on the peripheral wall of a tank.
Referring now to Figure 1 and Figure 2 of the drawings, a substantially circular slurry tank indicated generally at 10 comprises a base 12 having an upstanding peripheral wall 14.
Six substantially parallel spaced-apart pipes 16 are mounted in the tank 10 adjacent to the base 12 thereof. The pipes 16 extend over substantially the complete area of the base 12 and each pipe 16 is provided with a series of longitudinally spaced-apart outlet holes (not shown~.
The three pipes 16 on one side of the tank 10 are interconnected at substantially their mid points by a conduit 18 and the three pipes 16 on the other side of the tank are similarly interconnected at substantially their mid points by a conduit 20.
The conduit 18 is connected to a manifold (not shown) via a first motorised valve (not shown) and the conduit 20 is connected to the manifold (not shown) via a second motorised valve ~not shown). The first and second motorised valves (not 1~93227 shown), a timer tnot shown) for sequentially operating the valves, and the manifold (not shown) are mounted in a control box 22 secured to the exterior of the wall 14 of the tank 10.
The manifold (not shown) is connected via a pipe 24 to the exhaust of a milking machine (not shown) Gr, alternatively, the pipe 24 is connected to another suitable supply of compressed air. A non-return valve (not shown) is provided in each conduit 18, 20 to allow air to flow therethrough to the pipes 16, but to prevent flow of air in the reverse direction, or, alternatively, a single non-return valve is provided in the pipe 24 to allow air to flow therethrough into the manifold (not shown) but to prevent the flow of air in the reverse direction.
In operation, when the milking machine is operated or the alternative supply of compressed air is brought into opera-tion, the first motorised valve (not shown) is opened and air under pressure is supplied through the conduit 18 to the pipes 16 associated therewith and the air is expelled into the tank 10 to agitate and aerate the slurry on one side of the tank 10.
The timer (not shown) closes the first motorised valve (not shown) after a predetermined period of time and opens the second motorised valve (not shown) to supply the air under pressure from the manifold (not shown) vla the conduit 20 to the pipes 16 associated therewith. The air under pressure is expelled from the pipes 16 into the tank 10 to agitate and aerate the slurry in the other side of the tank 10. After a further predetermined time has elapsed, the timer (not shown) closes the second motorised valve (not shown), re-opens the first motorised valve (not shown) and the cycle of operation is repeated either for an overall period of time which is controlled by the timer (not shown) or for the full period of time that the milking machine (not shown) is in operation or the alternative supply of compressed air is maintained.
Referring now to Figure 3 of the drawings, an alternative slurry tank indicated generally at 30, which is of similar construction to the tank 10 but of larger diameter, is provided with four series of pipes 16 arranged to extend over substantially the entire area of the base of the tank 30. The four series of pipes 16 are each connected by a conduit 32, 34, 36 and 38 via an associated valve means to ~ manifold (not shown) housed in a control box 40 mounted on the exterior of the wall of the tank 30. The air under pressure which is supplied to the manifold (not shown) is directed to one of the series of pipes 16 by opening one of the valve means for a period of time under the control of a timer (not shown), and after this time has elapsed, the air is supplied to another one of the series of pipes 16 until air has been ejected into the slurry, to aerate and agitate the slurry, from all of the four series of pipes 16. The cycle of operation is then repeated either for a time determined by the timer (not shown) or for the full period of time that air under pressure is supplied to the manifold (not shown).
Referring now to Figures ~, S and 7 of the drawings, an alternative circular slurry tank is indicated generally at 42.
The tank 42 has a pump (not shown), a control unit (not shown), a timer (not shown), a manifold 44, three motorised valves 46 and a series of delivery pipes 4~.
The ~otorised valves 46 are equi-angularly spaced around a peripheral wall 50 of the tank 42. A pair of pipes 52 of the series of delivery pipes 48 extend downwardly towards the base of the tank 42 from each motorised valve 46, and into slurry 54 contained within the tank 42. Each pipe of each pair of pipes 52 is arranged at an angle of substantially 60 to the other pipe of the pair. The motorised valves 46 each connect a pair of pipes 52 to the peripheral wall 50, and each pair of pipes 52 slopes downwardly away from the peripheral wall 50 at an angle of substantially 30, towards the base of the tank 42.
The pump (not shown) supplies air under pressure to the manifold 44 from which the air is capable of passing via the motorised valves 46 to the pairs of pipes 52 and thence into `the slurry 54 through a single outlet aperture (not shown) located in the lower end of each of the delivery pipes 48.
Adjacent each outlet aperture (not shown) is a rubber flap 56 which is hinged to the end of each pipe 48 and each flap acts as a non-return valve to allow air under pressure to emerge from a delivery pipe 48 into the slurry 54 but to restrict the entry of slurry into the pipe 48, the flap 56 closing over the outlet aperture (not shown) in the pipe 48.
Each pair of pipes 52 are joined together so that a single pipe 58 interconnects each of the motorised valves 46 with the junction of their associated pair of pipes 52.
The control unit (not shown) determines which of the motorised valves 46 shall be supplied with the air from the manifold 44, and the timer (not shown) controls the length of time for which the air is supplied to a motorised valve 46 and also initiates the opening and closing of the motorised valve 46 at the beginning and end of that time respectively. The control unit (not shown) and timer (not shown) act together to allow air under pressure to be supplied in turn to each of the pairs of pipes 52 for a predetermined time. Once air under pressure is directed to a particular motorised valve 46 by the control unit (not shown), the timer (not shown) initiates the opening of the motorised valve 46 so that the air passes through the associated pipe 58, down each one of the associated pair of pipes 52 and out into the slurry 54 via the single outlet aperture (not shown) in each one of the pair of pipes 52. The air issuing from the outlet apertures in the said pair of pipes 52 pushes the flaps 56 out of contact with the apertures, the air thus being allowed to enter the slurry 54. At the end of the predetermined time the timer (not shown) initiates the closing of the motorised valve 46 and when the motorised valve is closed the control unit (not shown) directs air from the manifold 44 to a second one of the motorised valves 46 and the cycle of operations is repeated to give thorough agitation and aeration of the slurry 54 as the pairs of pipes 52 are supplied with air from the manifold 44 in sequence.
Referring to Figure 6 of the drawings, a rectangular slurry tank is indicated generally at 60 and the arrangement and operation of this tank 60 are similar to those of the circular tank 42 except that there are three motorised valves 46 equi-distantly spaced along each of the longer sides of the peripheral wall 50 of the tank 60.
The aeration and agitation of the slurry combats the tendency for the slurry to separate during storage into its liquid and solid components and also encourages bacteriological action within the slurry.
It has been found in conventional slurry tanks that when the slurry remains motionless for a period of time, the slurry tends to ~eparàte out into its liquid and solid constituents, which makes it difficult to remove the ~lurry from the tank. In addition, it has been found that the bacteria in the slurry which improve the nitrogen content thereof, become inactive when the slurry remaIns motionle3s for a period of time.
According to this invention a slurry tank comprises a base having an upwardly projecting wall extending around the periphery thereof, and at lea~t one pipe mounted in the tank, the pipe having at least one outlet aperture adjacent to the base of the tank so that compressed air can be fed through the pipe to emerge from the outlet aperture to agitate and aerate any slurry within the tank.
Prefera~ly, the or each pipe has a single outlet aperture and the or each pipe may extend do~wardly into the tank, the single outlet aperture being provided at or ad~acent to the lower end of the pipe. Preferably, also, a ~on-return valve i~ provided adjacent to the outlet aperture o~ the or each pipe and the or each non-return valve may comprise a pivotally mounted flap. The or each non-return valve may be formed of rubber or a plastics material.
A series of pipes may be provided, the pipes of the series being in fluid communication with each other and it is preferred that there is more than one series of pipes, the `
series being interconnected by a manifold. Preferably, control means is provided for selectively controlling the supply of air from the manifold to one of the series of pipes. The control means may comprise valve means and a timer for supplying air under pressure to one series of pipes for a predetermined period of time and then supplying air under pressure to another or the other series of pipes for a further predetermined period of time.
The flow of air to each series of pipes may be controlled by a motorised valve and each series of pipes may comprise a pair of interconnected pipes, there being a motorised valve connected to each pair of pipes and the motorised valves being mounted on the peripheral wall of the tank.
Each pair of interconnected pipes may diverge as they extend away from the motorised valve and there may be a plurality of pairs of pipes each with an associated motorised valve, the pairs being spaced apart around the peripheral wall of the tank.
Preferably, the or each motorised valve is connected to an air supply and the or each motorised valve may be connected to the same air supply. The air supply may comprise a supply pipe to which is connected a pump.
The timer may initiate the opening and closing of the or each motorised valve.
A preferred embodiment of this invention will now be described, by way of example only, with reference to the accompanying drawings, in which:-~0932Z7 Figure 1 is a plan view of a circular slurry tank, Figure 2 is a side elevation of the slurry tank shown in Figure 1 of the drawings, Figure 3 is a plan view of an alternative circular slurry tank, Figure 4 is a plan view of a further embodiment of a circular slurry tank, Figure 5 is a sectional side elevation of the slurry tank shown in Figure 4 taken on the line V-V, Figure 6 is a plan view of a rectangular slurry tank, and Figure 7 is a detailed perspective view of a motorised valve mounted on the peripheral wall of a tank.
Referring now to Figure 1 and Figure 2 of the drawings, a substantially circular slurry tank indicated generally at 10 comprises a base 12 having an upstanding peripheral wall 14.
Six substantially parallel spaced-apart pipes 16 are mounted in the tank 10 adjacent to the base 12 thereof. The pipes 16 extend over substantially the complete area of the base 12 and each pipe 16 is provided with a series of longitudinally spaced-apart outlet holes (not shown~.
The three pipes 16 on one side of the tank 10 are interconnected at substantially their mid points by a conduit 18 and the three pipes 16 on the other side of the tank are similarly interconnected at substantially their mid points by a conduit 20.
The conduit 18 is connected to a manifold (not shown) via a first motorised valve (not shown) and the conduit 20 is connected to the manifold (not shown) via a second motorised valve ~not shown). The first and second motorised valves (not 1~93227 shown), a timer tnot shown) for sequentially operating the valves, and the manifold (not shown) are mounted in a control box 22 secured to the exterior of the wall 14 of the tank 10.
The manifold (not shown) is connected via a pipe 24 to the exhaust of a milking machine (not shown) Gr, alternatively, the pipe 24 is connected to another suitable supply of compressed air. A non-return valve (not shown) is provided in each conduit 18, 20 to allow air to flow therethrough to the pipes 16, but to prevent flow of air in the reverse direction, or, alternatively, a single non-return valve is provided in the pipe 24 to allow air to flow therethrough into the manifold (not shown) but to prevent the flow of air in the reverse direction.
In operation, when the milking machine is operated or the alternative supply of compressed air is brought into opera-tion, the first motorised valve (not shown) is opened and air under pressure is supplied through the conduit 18 to the pipes 16 associated therewith and the air is expelled into the tank 10 to agitate and aerate the slurry on one side of the tank 10.
The timer (not shown) closes the first motorised valve (not shown) after a predetermined period of time and opens the second motorised valve (not shown) to supply the air under pressure from the manifold (not shown) vla the conduit 20 to the pipes 16 associated therewith. The air under pressure is expelled from the pipes 16 into the tank 10 to agitate and aerate the slurry in the other side of the tank 10. After a further predetermined time has elapsed, the timer (not shown) closes the second motorised valve (not shown), re-opens the first motorised valve (not shown) and the cycle of operation is repeated either for an overall period of time which is controlled by the timer (not shown) or for the full period of time that the milking machine (not shown) is in operation or the alternative supply of compressed air is maintained.
Referring now to Figure 3 of the drawings, an alternative slurry tank indicated generally at 30, which is of similar construction to the tank 10 but of larger diameter, is provided with four series of pipes 16 arranged to extend over substantially the entire area of the base of the tank 30. The four series of pipes 16 are each connected by a conduit 32, 34, 36 and 38 via an associated valve means to ~ manifold (not shown) housed in a control box 40 mounted on the exterior of the wall of the tank 30. The air under pressure which is supplied to the manifold (not shown) is directed to one of the series of pipes 16 by opening one of the valve means for a period of time under the control of a timer (not shown), and after this time has elapsed, the air is supplied to another one of the series of pipes 16 until air has been ejected into the slurry, to aerate and agitate the slurry, from all of the four series of pipes 16. The cycle of operation is then repeated either for a time determined by the timer (not shown) or for the full period of time that air under pressure is supplied to the manifold (not shown).
Referring now to Figures ~, S and 7 of the drawings, an alternative circular slurry tank is indicated generally at 42.
The tank 42 has a pump (not shown), a control unit (not shown), a timer (not shown), a manifold 44, three motorised valves 46 and a series of delivery pipes 4~.
The ~otorised valves 46 are equi-angularly spaced around a peripheral wall 50 of the tank 42. A pair of pipes 52 of the series of delivery pipes 48 extend downwardly towards the base of the tank 42 from each motorised valve 46, and into slurry 54 contained within the tank 42. Each pipe of each pair of pipes 52 is arranged at an angle of substantially 60 to the other pipe of the pair. The motorised valves 46 each connect a pair of pipes 52 to the peripheral wall 50, and each pair of pipes 52 slopes downwardly away from the peripheral wall 50 at an angle of substantially 30, towards the base of the tank 42.
The pump (not shown) supplies air under pressure to the manifold 44 from which the air is capable of passing via the motorised valves 46 to the pairs of pipes 52 and thence into `the slurry 54 through a single outlet aperture (not shown) located in the lower end of each of the delivery pipes 48.
Adjacent each outlet aperture (not shown) is a rubber flap 56 which is hinged to the end of each pipe 48 and each flap acts as a non-return valve to allow air under pressure to emerge from a delivery pipe 48 into the slurry 54 but to restrict the entry of slurry into the pipe 48, the flap 56 closing over the outlet aperture (not shown) in the pipe 48.
Each pair of pipes 52 are joined together so that a single pipe 58 interconnects each of the motorised valves 46 with the junction of their associated pair of pipes 52.
The control unit (not shown) determines which of the motorised valves 46 shall be supplied with the air from the manifold 44, and the timer (not shown) controls the length of time for which the air is supplied to a motorised valve 46 and also initiates the opening and closing of the motorised valve 46 at the beginning and end of that time respectively. The control unit (not shown) and timer (not shown) act together to allow air under pressure to be supplied in turn to each of the pairs of pipes 52 for a predetermined time. Once air under pressure is directed to a particular motorised valve 46 by the control unit (not shown), the timer (not shown) initiates the opening of the motorised valve 46 so that the air passes through the associated pipe 58, down each one of the associated pair of pipes 52 and out into the slurry 54 via the single outlet aperture (not shown) in each one of the pair of pipes 52. The air issuing from the outlet apertures in the said pair of pipes 52 pushes the flaps 56 out of contact with the apertures, the air thus being allowed to enter the slurry 54. At the end of the predetermined time the timer (not shown) initiates the closing of the motorised valve 46 and when the motorised valve is closed the control unit (not shown) directs air from the manifold 44 to a second one of the motorised valves 46 and the cycle of operations is repeated to give thorough agitation and aeration of the slurry 54 as the pairs of pipes 52 are supplied with air from the manifold 44 in sequence.
Referring to Figure 6 of the drawings, a rectangular slurry tank is indicated generally at 60 and the arrangement and operation of this tank 60 are similar to those of the circular tank 42 except that there are three motorised valves 46 equi-distantly spaced along each of the longer sides of the peripheral wall 50 of the tank 60.
The aeration and agitation of the slurry combats the tendency for the slurry to separate during storage into its liquid and solid components and also encourages bacteriological action within the slurry.
Claims (11)
1. A slurry tank comprising:
a base having an upwardly projecting wall extending around the periphery thereof;
at least two pipes mounted in said tank;
each of said pipes having an outlet aperture at the bottom of said tank;
means for supplying compressed air to said pipes, whereby said compressed air emerges from said outlet apertures to agitate and aerate slurry in said tank; and control means for automatically sequentially control-ling the supply of air under pressure from said air supply means to each of said pipes in turn for a predetermined period of time.
a base having an upwardly projecting wall extending around the periphery thereof;
at least two pipes mounted in said tank;
each of said pipes having an outlet aperture at the bottom of said tank;
means for supplying compressed air to said pipes, whereby said compressed air emerges from said outlet apertures to agitate and aerate slurry in said tank; and control means for automatically sequentially control-ling the supply of air under pressure from said air supply means to each of said pipes in turn for a predetermined period of time.
2. A slurry tank according to claim 1, where at least two series of said pipes are mounted in the tank and the pipes associated with one of said series are in fluid com-munication with each other.
3. A slurry tank according to claim 2, wherein each of said series of pipes is connected to said control means to automatically sequentially control the supply of air under pressure from said air supply means to each of said series of pipes in turn for a predetermined period of time.
4. A slurry tank according to claim 3, wherein said control means comprises at least two valves and a timer, each of said valves being connected between an associated one of said series of pipes and said air supply means to control the flow of air through said associated series of pipes and said timer being adapted to initiate the opening and closing of each of said valves.
5. A slurry tank according to claim 4, wherein each of said valves is a motorised valve.
6. A slurry tank according to claim 4, wherein each of said series of pipes comprises a pair of interconnected pipes to which an associated one of said valves is also con-nected.
7. A slurry tank according to claim 6, wherein said valves are mounted on a peripheral wall of said tank.
8. A slurry tank according to claim 7, wherein said pipes of each pair diverge as they extend away from the associa-ted valve, and said pairs of pipes are spaced-apart around said peripheral wall of said tank.
9. A slurry tank according to claim 1, wherein each of said pipes is provided at the outlet aperture with a non-return valve which permits compressed air to flow out of each of said pipes into said tank but prevents slurry from flowing into said pipe.
10. A slurry tank according to claim 9, wherein each of said non-return valves comprises a pivotally mounted flap.
11. A slurry tank according to claim 9, wherein said non-return valve is formed of rubber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41342/75 | 1975-10-08 | ||
| GB41342/75A GB1568813A (en) | 1975-10-08 | 1975-10-08 | Slurry tanks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1093227A true CA1093227A (en) | 1981-01-06 |
Family
ID=10419246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA262,681A Expired CA1093227A (en) | 1975-10-08 | 1976-10-05 | Slurry tanks |
Country Status (10)
| Country | Link |
|---|---|
| BE (1) | BE847054A (en) |
| CA (1) | CA1093227A (en) |
| DE (1) | DE2645224A1 (en) |
| DK (1) | DK452576A (en) |
| ES (1) | ES452352A1 (en) |
| FR (1) | FR2327203A1 (en) |
| GB (1) | GB1568813A (en) |
| IE (1) | IE44033B1 (en) |
| LU (1) | LU75969A1 (en) |
| NL (1) | NL7611149A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052722B1 (en) * | 1980-11-22 | 1985-02-20 | Brinkmann, Heinrich Bernhard | Process and installation for separating a liquid waste product, such as manure or sewage, into a liquid phase and a solid phase |
| AT379370B (en) * | 1981-11-30 | 1985-12-27 | Knepper Agnes | METHOD AND DEVICE FOR PRODUCING SOLID FERTILIZERS BY SEPARATING GUELL IN A SOLID AND LIQUID PHASE |
| EP0145647A1 (en) * | 1983-11-09 | 1985-06-19 | Strässler AG. | Device and process for fine-bubble aeration and/or mixing of a liquid |
| GB2154226A (en) * | 1984-02-16 | 1985-09-04 | Victor Lawson | Digestor tanks |
| GB2354958A (en) * | 1999-10-04 | 2001-04-11 | Holloway Walter | Agricultural slurry aerator with compressed air discharged from vertical pipes |
| AT521051B1 (en) * | 2018-10-01 | 2019-10-15 | Stadlbauer Peter | Device for the automated emptying of slurry tanks |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE355802C (en) * | 1915-11-14 | 1922-07-17 | Jones & Attwood Ltd | System for cleaning waste water |
| CH161777A (en) * | 1932-12-21 | 1933-05-31 | Wyss Paul | Method and device for stirring up liquid manure in cesspools. |
| DE1281962B (en) * | 1961-02-17 | 1968-10-31 | Emschergenossenschaft | Device for distributing air in waste water |
| CH432917A (en) * | 1966-04-21 | 1967-03-31 | Bucher Guyer Ag Masch | Compressed air agitator for a cesspool |
| DE2015189A1 (en) * | 1969-06-11 | 1970-12-17 | International Projects Corp. Ltd., Gibraltar (Großbritannien) | Device for processing overburden, sludge or the like |
| FR2284809A1 (en) * | 1974-09-10 | 1976-04-09 | Aveline Henri | Device for aeration, emulsification and agitation of suspensions - for liquid manure is designed to avoid blocking air distributing system |
-
1975
- 1975-10-08 GB GB41342/75A patent/GB1568813A/en not_active Expired
-
1976
- 1976-10-04 IE IE2184/76A patent/IE44033B1/en unknown
- 1976-10-05 CA CA262,681A patent/CA1093227A/en not_active Expired
- 1976-10-07 DK DK452576A patent/DK452576A/en not_active Application Discontinuation
- 1976-10-07 FR FR7630839A patent/FR2327203A1/en active Granted
- 1976-10-07 DE DE19762645224 patent/DE2645224A1/en not_active Ceased
- 1976-10-08 NL NL7611149A patent/NL7611149A/en not_active Application Discontinuation
- 1976-10-08 BE BE2055361A patent/BE847054A/en not_active IP Right Cessation
- 1976-10-08 LU LU75969A patent/LU75969A1/xx unknown
- 1976-10-13 ES ES452352A patent/ES452352A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IE44033L (en) | 1977-04-08 |
| IE44033B1 (en) | 1981-07-29 |
| BE847054A (en) | 1977-01-31 |
| FR2327203B1 (en) | 1982-08-20 |
| DK452576A (en) | 1977-04-09 |
| GB1568813A (en) | 1980-06-04 |
| DE2645224A1 (en) | 1977-04-21 |
| LU75969A1 (en) | 1977-05-09 |
| NL7611149A (en) | 1977-04-13 |
| FR2327203A1 (en) | 1977-05-06 |
| ES452352A1 (en) | 1978-01-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |