AU712789B2 - Waste treatment system and method - Google Patents
Waste treatment system and method Download PDFInfo
- Publication number
- AU712789B2 AU712789B2 AU86111/98A AU8611198A AU712789B2 AU 712789 B2 AU712789 B2 AU 712789B2 AU 86111/98 A AU86111/98 A AU 86111/98A AU 8611198 A AU8611198 A AU 8611198A AU 712789 B2 AU712789 B2 AU 712789B2
- Authority
- AU
- Australia
- Prior art keywords
- tank
- liquid
- humus
- aeration tank
- aeration
- 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.)
- Withdrawn - After Issue
Links
- 239000002699 waste material Substances 0.000 title claims description 43
- 238000000034 method Methods 0.000 title claims description 11
- 238000005273 aeration Methods 0.000 claims description 46
- 239000003864 humus Substances 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 35
- 238000001914 filtration Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 20
- 239000007791 liquid phase Substances 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims description 16
- 229920000728 polyester Polymers 0.000 claims description 9
- 239000007790 solid phase Substances 0.000 claims description 6
- 241000894007 species Species 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 239000010808 liquid waste Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000010791 domestic waste Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
-
- 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
- Biological Treatment Of Waste Water (AREA)
- Treatment Of Biological Wastes In General (AREA)
Description
999999 9 *99 9 9 9
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): SHERIDAN MORLEY PETER HARTE Invention Title: WASTE TREATMENT SYSTEM AND METHOD The following statement is a full description of this invention, including the best method of performing it known to me/us: 2 WASTE TREATMENT SYSTEM AND METHOD This invention relates to a waste treatment system for treating sewerage and other waste material from domestic and industrial environments.
Most domestic waste treatment systems simply comprise a conventional septic tank in which sewerage and other waste material are treated. The septic tank has an outlet for egress of liquid waste material which generally is passed through a long underground pipe to disperse into the surrounding soil. Generally, the liquid which exits the septic tank is not suitable for above ground use due to the high bacteria and solid content.
The object of the present invention is to provide a treatment system which can treat waste material including 9 sewerage and domestic or industrial waste and which can produce an output liquid which is suitable for above ground 20 use by way of discharge through a drip system or sprayed onto a garden or the like.
9999 r The invention, provides a waste treatment system including: 99 ooa primary tank for receiving waste material and for allowing solids and liquid to separate; an aeration tank coupled to the primary tank for receiving and temporarily retaining liquid and suspended solids from the primary tank for aerobic treatment in the aeration tank; means for delivering air into the aeration tank for causing the liquid and suspended solids in the aeration tank to undergo the aerobic treatment; a humus tank, coupled to the aeration tank, for receiving and storing aerobically treated liquid which passes to the humus tank from the aeration tank and for allowing small solids to settle in the humus tank thereby L increasing the purity of the liquid; and A:\WASTE TREATMENT SYSTEM AND METHOD speci.doc 22/09/99 3 an outlet from the humus tank for discharge of the liquid from the humus tank.
The invention produces a liquid discharge which is relatively free of solid material and includes extremely low bacterial level thereby making the liquid discharge suitable for above ground use from a drip system or spray system on domestic gardens or other above ground uses which require water. The present invention therefore has the advantage of more efficient use of the liquid discharged from the treatment system than conventional septic tank systems with consequential saving in water and also avoids the need for below ground piping from a septic system which is prone to blockage and therefore improper discharge of 15 the water from the septic into the surrounding soil.
o*ooo Preferably a filtration means is included, the filtration means comprises at least one tube which comprises a substantially solid pipe having at least one inlet aperture 20 and a filter member covering the at least one inlet aperture so that treated waste material is filtered by the filter member to separate the solid and liquid phases.
Preferably the filter member comprises a felted polyester .e scrim reinforced material which is chemically and biologically inert.
S.
Preferably the felted polyester scrim reinforced material is formed as a sleeve which is fitted over the pipe so that the pipe resits hydraulic pressure from the treated waste material which would otherwise cause the sleeve of felted A:\WASTE TREATMENT SYSTEM AND METHOD speci doc 22/09/99 4 polyester scrim reinforced material to collapse.
Thus, whilst it is preferred that the sleeve of polyester felted material be arrange over the pipe so that it is exterior of the pipe, the sleeve of polyester felted material could be arranged within the pipe and adhered to the inner periphery of the pipe to thereby cover the at least one inlet opening.
Preferably the at least one inlet opening comprises a plurality of slots or holes in the pipe.
ooooo Preferably the system includes the air supply with the air eoi supply preferably comprising an air pump and conduit for 15 delivering air into the aeration compartment.
S.
Preferably the aeration compartment includes at least one surface area medium for increasing the surface area within the aeration compartment.
Preferably the filtration means is provided in the aeration compartment and a humus compartment is arranged between the filtration means and the outlet for receiving the liquid phase from the filtration means and for delivering the 25 liquid phase to the outlet.
Depending on the intended use of the liquid phase which is to be discharged from the waste treatment system, a contact tank may be arranged between the humus compartment and the outlet for receiving the liquid phase from the humus compartment and for further treatment of the liquid phase before the liquid phase is passed to the outlet.
Preferably the humus compartment includes at least one surface area medium for increasing the surface area of the humus compartment.
H:\Sabene\Keep\Sei\MORLEY-HARTE-waste- 21/09/98 5 For high volume environments such as may be found in industrial applications or if the treatment system is to be used for shopping centres, small towns, housing developments or the like rather than a domestic dwelling, the aeration compartment may comprise a plurality of aeration compartments arranged in series, each aeration compartment including a said filtration means so that a first of the aeration compartments causes the waste material to undergo aerobic biological treatment to produce the treated waste material, the filtration means associated with the first compartment separating the treated waste material into a liquid phase and solid phase and for delivering the liquid phase to a subsequent aeration compartment for further aerobic biological treatment to 15 produce further treated waste material, the subsequent aeration compartments each having respective filtration means for further separating a liquid phase and solid phase of- the further treated waste material.
20 In one preferred embodiment of the invention, the permeability of the filter member of the filtration means 0 .may decrease from the first to subsequent filtration means .in the first and subsequent aeration compartments *respectively so as to increasingly reduce the solid phase of the treated and further treated waste material before the further treated waste material is passed to the outlet.
6,:Preferred embodiments of the invention will be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a view of a waste treatment system according to one embodiment of the invention particularly adapted for domestic use; Figure 2 is a cross-sectional view of the system of Figure 1; Figure 2A is a view of part of the embodiment of RFigures 1 and 2; A:\WASTE TREATMENT SYSTEM AND METHOD speci.doc 22/09/99 6 Figure 3 is a detailed view of part of the system of Figures 1 and 2; Figures 4,5 and 6 are front, top and side views of a second embodiment of the invention; Figure 7 is a schematic side view of a treatment system according to another embodiment of the invention particularly adapted for industrial or large volume environments; and Figure 8 is a cross-sectional view along the line V-V of Figure 7.
.With reference to Figure 1, a treatment system 10 is shown which comprises a conventional sewerage tank 12 which has a sewer inlet 14 for receiving sewerage and other waste 15 material from a house (not shown). The sewerage tank 12 have access lids 16 as is conventional and has primary and secondary chambers 12a and 12b separated by a partition 18.
•A discharge tube 20 is provided for discharge of liquid waste material which would conventionally include a large proportion of solid matter.
The sewerage tank 12, as is conventional, allows for conventional solids separation to occur and the discharge outlet 20 would normally be connected to an underground pipe system for receiving the overflow from the sewerage tank 12 and for enabling dispersion of the overflow of liquid into the ground. However, according to this embodiment of the invention, the discharge tube 20 is coupled to a further treatment tank 30 which includes an aeration compartment 32 and a humus compartment 34 which are separated by a baffle or wall 36. The discharge tube has an outlet end 21 which is arranged above a medium 38, such as a BIO BLOCK (trade mark), in the aeration compartment 32 which acts to increase the surface area of the aeration compartment 32. The medium 38 simply is a member which enables bacteria to grow and therefore increases the surface area within the compartment 32. The H: \Sabene\Keep\Speci\MORLEY-HARTE-aste-treatment-systemcompetedoc 21/09/98 7 medium 38 may take the form of a grid, lattice work or other network simply presenting surface area upon which bacteria can accumulate and grow within the compartment 32.
The tank 30 may have access lids 40. An air pump 42 is arranged within the tank 30 and is powered from a power source (not shown) such as a conventional 240 volt electric supply. The pump 42 is connected to a air discharge ring 44 via a conduit 46 for delivery of air into the aeration compartment 32. The waste material in the aeration compartment 32 undergoes aerobic biological treatment.
Typically, in domestic environment, a relatively long aeration detention occurs in the compartment 32 of usually twenty-four hours or more thereby providing a high degree of BOD removal of approximately 95% to 98%. Micro- 15 organisms exit in the endogenous phase of respiration by maintaining a low BOD loading, a high mixed-liquor suspended solids, and long retention time within the compartment 32.
S. 20 A filtration unit 50 is arranged within the aeration compartment 32 and comprises a plurality of tubes 52 which extend substantially vertically and are joined by a tray 54 at their upper end for discharge of a liquid phase into the humus compartment 34 via tube 58. As is best shown in Figure 2A, the tubes 52 are connected to the tray 54 at the .i :top of the tubes 52. The tubes 52 project up into the tray o 54 a short distance with the top of the tubes 52 arranged below the top of walls 54a of the tray 54. The tray 54 has a bracket 56 for enabling connection of the tray 54 and tubes 52 to the partition wall 36 to secure the filter member 50 in place. An outlet tube 58 also communicates with the tray 54 and as is shown in Figure 1, projects downwardly below the tubes 52 and through the partition wall 36 to deliver filtered liquid into the humus tank 34.
Thus, liquids which pass up through the tubes 52 flow into the tray 54 and then down through the outlet tube 58 into Sthe humus tank 34.
A:\WASTE TREATMENT SYSTEM AND METHOD speci.doc 22/09/99 8 The air flow from the air ring 44 induces a pattern of circulation in the waste material in the compartment 32 so that fluid travels upwards and outwards just below the top of the tubes 52. Hence, fluid circulates horizontally across the tubes 52, along the outside walls 31 of the aeration chamber 32 then downward and along the bottom 33 of the aeration chamber back to the aeration ring 44.
One of the tubes 52, labelled 52' in Figure 1 and Figure 2, is shown in more detail in Figure 3.
As is best shown in Figure 3, the tubes 52 each comprise an expander pipe 55 of polyethylene or like substantially 15 rigid material which includes a plurality of inlet openings 57 which may be in the form of slots or holes in the side wall of the pipe 55. The pipe 55 has a closed base 59. A sleeve 61 of filter material is provided over the pipe and comprises a felted polyester scrim reinforced material which is chemically and biological inert. The sleeve 61 is 0. a tight fit over the pipe 55 so that treated waste material 0 in the compartment 32 must pass through the sleeve 61 before passing through the openings 57 into the pipe 55 for 0 delivery into the compartment 34. The substantially rigid S. 25 pipe 55 resists hydraulic pressure from the fluid in the compartment 32 and keeps the sleeve 61 in a cylindrical configuration thereby ensuring proper operation of the filter sleeve 61. The filter sleeve 61 effectively filters the treated waste material so that the solid phase is retained within the compartment 32 and the liquid phase is able to pass through the filter sleeve 61 into the pipe and then travel into the humus compartment 34.
In the embodiment of Figure 1, the air permeability of the filter sleeve 61 is in the order of 415 to 690, the burst strength of the sleeve 61 is approximately 350 psi and the pipe 55 is preferably 75 mm diameter.
H:\Sabene\Keep\Speci\MORLEY-HRTE-waste-treatment-systemcompete.doc 21/09/98 9 A medium 75, such as a BIO BLOCK (trade mark), is provided in humus tank 34 for increasing the surface area within the humus tank 34. The humus tank 34 has a discharge pipe and a further medium 77, such as a BIO BLOCK (trade mark), is arranged adjacent the discharge pipe 80 within the compartment 34. When the liquid phase enters the humus tank 34, the humus tank 34 effectively acts as a storage medium for retaining liquid and allowing any small solids which may pass through the filter member 50 to settle in the humus tank thereby increasing the purity of the discharge through the discharge pipe The discharge pipe 80 leads to a contact tank 95 which may 15 be included if additional treatment of the liquid phase delivered from the tank 34 is required. For example, the tank 95 may include a chlorination dispenser 97 and provide a: chlorine treatment of the liquid phase if the liquid phase is to be used above ground and sprayed as distinct from drip deposited onto the ground. A pump 102 may be included within the tank 95 for pumping the liquid out of an outlet
S
101. The outlet 101 may be connected to the spray system (not shown) for spraying the liquid phase or to drip irrigation piping (not shown) for drip depositing the liquid phase onto the ground. A high water level alarm 103 may be included for providing an alarm if the liquid level in the tank 95 exceeds a desired level.
The outlet opening 101 in Figure 1 is arranged below the level of the partition wall 36 so that the liquid level in the compartment 32 cannot rise above the partition wall 36 to deposit unfiltered treated waste from the compartment 32 into the compartment 34 which would then discharge via the outlet 101. Once the system is fully operational, the liquid level in the septic tank 10, aeration compartment 32, and humus tank 34 is approximately at the level of the tray 54 so that as liquid enters the sewage inlet 14, a H: \Sabene\Koep\Speci\MORLEY-HARTE-waste-treatment-systemcomplete~oc 21/09/98 10 corresponding amount of liquid is caused to flow through the tubes 52 into the tray 54 and out through the outlet tube 58 into the humus tank 34 thereby causing liquid in the humus tank 34 to flow through the discharge pipe into the contact tank 95 and so the corresponding amount of liquid can exit the outlet 101.
The discharge pipe 80 may be connected to a vertical discharge section 81 within the tank 95 for delivery of liquid towards the bottom of the tank Thus, once treated and relatively clear effluent liquid *o"eo passes through the humus tank 32, it can be further treated in the contact tank 95 before being used above ground on a 15 garden or the like.
As treatment continues or matures within the system 10, the surface of each of the tubes 52 accumulates a mass of aerobic bacteria. The extent of bacterial build-up is 20 limited and regulated by the constant washing action of the
S
horizontal flow of the liquid within the compartment 32.
In additional, a natural sluffing of inert solids takes place which also limits the build-up of activated sludge.
This embodiment does not require a back wash system due to the washing action of the horizontal flow referred to above which is primarily caused by the air pump and natural sluffing effect. However, the tubes 32 will require cleaning from time to time but usually the period will be in the order of three to four years.
Testing performed to date shows a BOD and TSS removal efficiency of 96% to 98%, pathogenic bacteria removal efficiency of greater than 99%, virus removal efficiency of 99% to 100%, resulting in clear colourless effluent suitable for surface and sub-surface discharge from the outlet 101.
H:\Sabene\Keep\Speci\MORLEY-HARTE-waste-treatment-system-complete.doc 21/09/98 11 If the tanks 12, 30 and 95 are to be below ground level by a distance of more than 400 mm for example, the openings which are closed by the access lids 16 and 40 must be raised to ground level by saddle extensions 105 with lids (not shown) being arranged on the saddle extensions 105.
Figures 4, 5 and 6 are views of a filtration unit 120 according to a second embodiment of the invention. The unit 120 is generally in the form of a box 124 which is formed from filter material such as that from which the sleeve 61 of the earlier embodiment is made. The box 124 *may have an open top 126 which can be closed by a plastic lid (not shown).
15 A fixing bracket 128 may be attached to the box 124 for coupling the box to wall 36 (see Figure A pipe 129 is located in the box 124 and has a generally vertically extending portion 130 and a horizontally extending portion 131 which projects out through the side of the box 124.
The pipe 130 may be encased in a sleeve of the filter material in a similar fashion to the tubes 52.
In this embodiment the box is located in compartment 32 with the top of the box 124 above water level in the system so that water must pass through the filter material from which the box 124 is made and then into the tube 130 before flowing into the humus tank 34.
Figures 7 and 8 show a second embodiment of the invention which is intended for larger volume environments such as industrial environments, shopping centres, small towns and the like. In the embodiment of Figure 7, a number of aeration tanks 150 are provided. In Figure 7, three such tanks are included but the number of tanks may be more than three. Each tank 150 includes a filtration unit 160 which is generally the same as the filtration unit 50 described with reference to Figures 1 and 2. However, in Figures 7 H:\Sabene\Keep\Speci\MORLEY-HARTE-waste-treatment-system-complete.doc 21/09/98 12 and 8, the tubes 162 are arranged in a circular array rather than a square grid as shown in Figures 1 and 2.
Filtration unit 160 includes vertical tubes 162 constructed as is shown in Figure 3 which are joined by an upper tube section 164. An air inlet tube 180 provides air into the aeration tanks 150 for aerobic biological treatment within each tank 150. The filter material associated with each of the tubes 162 may vary from a coarse material in the tank 150 marked A in Figure 7 to finer material in the tanks marked B and C so as to progressively filter out solid material from the treated liquid waste as the treated liquid waste passes from one tank 150 into a subsequent .:s*e tank 150. Thus, in the system of Figures 7 and 8, a number so** of aeration tanks which function in a similar manner to the 15 tank 32 described with reference to Figure 1 are provided in series with subsequent tanks acting as the humus tank 34 in Figure 1 but also including the ability for further aerobic treatment of waste material.
The tanks 150 may include mediums similar to the media 38, "75 and 77 described with reference to Figure 1.
Preferably the media 38, 75 and 77 have a surface area of 100 m 2 per cubic meter, provide an area flow of include a hollow space of 90%. The media are formed of a plurality of tubes of, for example, 70 mm diameter.
Since modifications within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not limited to the particular embodiments described by way of example hereinabove.
H: \Sabene\Keep\Speci\MORLEY-HARTE-waste-tr 21/09/98
Claims (9)
1. A waste treatment system including: a primary tank for receiving waste material and for allowing solids and liquid to separate; an aeration tank coupled to the primary tank for receiving and temporarily retaining liquid and suspended solids from the primary tank for aerobic treatment in the aeration tank; means for delivering air into the aeration tank for causing the liquid and suspended solids in the aeration tank to undergo the aerobic treatment; a humus tank, coupled to the aeration tank, for receiving and storing aerobically treated liquid which 15 passes to the humus tank from the aeration tank and for allowing small solids to settle in the humus tank thereby increasing the purity of the liquid; and an outlet from the humus tank for discharge of the liquid from the humus tank.
2. The system of claim 1 further including a ooo filtration means between the aeration tank and the humus tank for filtering the aerobically treated liquid when the liquid passes from the aeration tank to the humus tank.
The system of claim 2 where the filtration means includes at least one tube which comprises a substantially solid pipe having at least one inlet aperture and a filter member covering the at least one inlet aperture so that treated waste material is filtered by the filter member to separate the solid and liquid phases.
4. The system of claim 3 where the filter member comprises a felted polyester scrim reinforced material which is chemically and biologically inert.
A:\WASTE TREATMENT SYSTEM AND METHOD speci.doc 22/09/99 1 14 The system of claim 4 where the felted polyester scrim reinforced material is formed as a sleeve which is fitted over the pipe so that the pipe resits hydraulic pressure from the treated waste material which would otherwise cause the sleeve of felted polyester scrim reinforced material to collapse
6. The system of claim 3 where the at least one inlet aperture comprises a plurality of slots or holes in the pipe.
7. The system according to anyone of preceding claims wherein the means for delivering air includes and air discharge ring located adjacent a bottom of the 15 aeration tank and below the filtration means, and air conduit coupled to the air discharge ring and extending out of the aeration tank, a pump for supplying air into the conduit, and wherein air flow from the air ring induces a pattern of circulation in the aeration tank so that the *e 20 liquid in the aeration tank travels upwards and generally horizontally across the filtration means and then downward toward the bottom portion of the aeration tank.
8. The system of anyone of claims 1 to 7 where the aeration tank includes at least one surface area medium for increasing the surface area within the aeration compartment.
9. The system of claim 7 wherein the humus tank includes at least one surface area medium for increasing the surface area of the humus tank. A waste treatment system substantially as hereinbefore described with reference to the Figures 1 to 6 of the accompanying drawings. A:\WASTE TREATMENT SYSTEM AND METHOD speci.doc 22/09/99 4 4 15 Dated this 22nd day of Septemnber 1999 SHERIDAN MORLEY PETER HARTE By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia A:\WASTE TREATMENT SYSTEM AND METHOD specidoc 22/09/99
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU86111/98A AU712789B2 (en) | 1998-01-27 | 1998-09-21 | Waste treatment system and method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP1485 | 1998-01-27 | ||
| AUPP1485A AUPP148598A0 (en) | 1998-01-27 | 1998-01-27 | Waste treatment system and method |
| AU86111/98A AU712789B2 (en) | 1998-01-27 | 1998-09-21 | Waste treatment system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU8611198A AU8611198A (en) | 1999-01-07 |
| AU712789B2 true AU712789B2 (en) | 1999-11-18 |
Family
ID=25640627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU86111/98A Withdrawn - After Issue AU712789B2 (en) | 1998-01-27 | 1998-09-21 | Waste treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU712789B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601789A (en) * | 2017-11-06 | 2018-01-19 | 成都信息工程大学 | A kind of integrated form integral life sewage processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4568463A (en) * | 1983-02-24 | 1986-02-04 | Klein Samuel H | Method and apparatus for the purification of water and other aqueous liquids |
| EP0446926A1 (en) * | 1990-03-14 | 1991-09-18 | Roediger, Walter | Apparatus for waste water clarification |
| US5494577A (en) * | 1993-12-24 | 1996-02-27 | Stork Friesland B.V. | Membrane bioreactor with gas lift system |
-
1998
- 1998-09-21 AU AU86111/98A patent/AU712789B2/en not_active Withdrawn - After Issue
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4568463A (en) * | 1983-02-24 | 1986-02-04 | Klein Samuel H | Method and apparatus for the purification of water and other aqueous liquids |
| EP0446926A1 (en) * | 1990-03-14 | 1991-09-18 | Roediger, Walter | Apparatus for waste water clarification |
| US5494577A (en) * | 1993-12-24 | 1996-02-27 | Stork Friesland B.V. | Membrane bioreactor with gas lift system |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8611198A (en) | 1999-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CB | Opposition lodged by |
Free format text: SEP-TECH INDUSTRIES AUSTRALIA PTY LTD |
|
| MK12 | Application lapsed section 141(1)/reg 8.3(2) - applicant filed a written notice of withdrawal |