GB2475047A - Wet Waste Recycling System - Google Patents
Wet Waste Recycling System Download PDFInfo
- Publication number
- GB2475047A GB2475047A GB0919227A GB0919227A GB2475047A GB 2475047 A GB2475047 A GB 2475047A GB 0919227 A GB0919227 A GB 0919227A GB 0919227 A GB0919227 A GB 0919227A GB 2475047 A GB2475047 A GB 2475047A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filtration
- wet waste
- water
- recycling system
- waste recycling
- 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.)
- Granted
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 64
- 238000004064 recycling Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000001914 filtration Methods 0.000 claims abstract description 69
- 238000005189 flocculation Methods 0.000 claims abstract description 51
- 230000016615 flocculation Effects 0.000 claims abstract description 50
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 7
- 230000001954 sterilising effect Effects 0.000 claims abstract description 7
- 229920002988 biodegradable polymer Polymers 0.000 claims description 3
- 239000004621 biodegradable polymer Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000010802 sludge Substances 0.000 description 9
- 241001417527 Pempheridae Species 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003053 toxin Substances 0.000 description 2
- 231100000765 toxin Toxicity 0.000 description 2
- 108700012359 toxins Proteins 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 235000021463 dry cake Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L11/00—Methods specially adapted for refuse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/008—Mobile apparatus and plants, e.g. mounted on a vehicle
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A wet waste recycling system comprising a plurality of portable units including a multi-pump unit (3 figure 1) for introducing a polymer into wet waste so as to form a mixture, a filtration/flocculation container 4 in which flocculation of the mixture occurs such that water is separated from solids contained in said mixture, a filtration unit 25 for filtering water separated from the solids, and a sterilisation unit 26 for sterilising the filtered water. The system may comprise a tank 6 for storing the recycled water, and a switchboard 24 configured to close a valve 28 on the filtration/flocculation container and open a valve 29 on the recycled water tank when the recycled water tank is full and allow for water in the tank to be circulated through the sterilization unit. The switch board may be further configured to open the valve to the filtration flocculation container and close the valve to the recycled water tank when the water level in the tank is low such that separated water flows from the filtration flocculation container through the filtration and sterilization units into the recycled water tank.
Description
Wet Waste Recycling System
Description
The present invention relates to a wet waste recycling system.
Road sweepers, tankers or other waste carriers used for cleaning roads, drains or sewers etc. require water in order to perform their function, which is then returned to the vehicle and removed from site. The vehicles typically obtain water from water reservoirs such as local authority street hydrants which in some areas are overstrained, and the wet waste produced from these services is transported and deposited at landfill or even at unregulated sites, as there are no major alternatives available at present. This is not only in breach of EU law but also involves repeated journeys to the landfill sites which are typically remote to the site of cleaning. This causes a significant carbon footprint as well as high transportation costs. Moreover, the wet waste may contain toxins or other substances causing a threat to the environment when deposited directly at landfill sites.
The present invention seeks to provide devices which can be operated to substantially alleviate the problems mentioned above.
According to the present invention, there is provided a wet waste recycling system comprising a plurality of portable units connected to each other at or close to a treatment site, including a multi-pump unit for introducing a polymer into wet waste so as to form a mixture, a filtration/flocculation container in which flocculation of the mixture occurs such that water is separated from solids contained in said mixture, a filtration unit for filtering water separated from the solids, and a sterilisation unit for sterilising the filtered water.
In one embodiment, the system further comprises a high tip container which removes larger solids from the wet waste prior to transfer of the wet waste into the multi-pump unit.
The multi-pump unit may be configured to pump the mixture into the filtration/flocculation container.
In one embodiment, the multi-pump unit comprises a valve for controlling the flow of mixture to the filtration/flocculation container.
The multi-pump unit may also comprise a control panel for starting and stopping the multi-pump unit.
In a preferred embodiment, the filtration/flocculation container comprises an inlet for receiving the mixture and an outlet for discharging the separated water.
The separated water may be transferred from the filtration/flocculation container to the filtration and sterilisation unit.
The filtration and sterilisation unit preferably comprises ultraviolet light system for sterilising the water.
The system may also comprise a recycled water tank for storing water that has been filtered and sterilised.
In one embodiment, the system comprises a switch board, a valve controlling the flow of separated water from the filtration/flocculation container to the filtration and sterilisation unit, and a valve controlling circulation of water of the recycled water tank through the ultraviolet light system.
The switch board may be configured to close the valve of the filtration/flocculation container and open a valve of the recycled water tank when the recycled water tank is full so as to stop the recycling water tank from overflowing and to allow for the water in the recycled water tank to circulate through the ultraviolet light system, the switch board being further configured to open the valve to the filtration/flocculation container and close the valve to the recycled water tank when the water level in the recycled tank is low such that the separated water flows from the filtration/flocculation container through the filtration and sterilisation unit to the recycled water tank.
In a preferred embodiment, the multi-pump unit, filtration/flocculation container, filtration and sterilisation unit are mobile and removably attachable to one another via releasable pipework.
The polymer introduced into the wet waste may be a biodegradable polymer.
In some embodiments, two or more of said portable units are disposed on a vehicle and connected for use whilst on said vehicle.
Embodiments of the present invention will now be described by way of example only, with reference to the following drawings: Figure 1 shows a flow chart of steps of the wet waste recycling system of Figure 1; Figure 2 shows a schematic illustration of a waste carrier and a high tip container; Figure 3 shows a schematic illustration of the high tip container of Figure 2, the high tip container being in a vertical position disposing of waste into a container; Figure 4 shows a schematic illustration of a filtration/flocculation container; Figure 5 shows a diagram of the operation of a fritration and sterilisation unit.
Referring now to the drawings, Figure 1 shows a wet waste recycling system I according to the present invention comprising mobile units including a high tip container (HTC) 2, a multi-pump unit (multi-pump unit) 3, dewatering system (filtration/flocculation container) 4, filtration and sterilisation unit 5 and a recycled water tank 6. The wet waste recycling system 1 is configured to recycle the water in the wet waste such that it can be reused in further cleaning operations and thereby eliminate the deposit of waste water at landfill sites. Furthermore, as the wet waste recycling system comprises mobile units, the system 1 can be installed in close proximity to the point of operation of the waste carriers so as to reduce transportation of waste water.
The steps of processing the wet waste using the wet waste recycling system 1 is shown in Figure 1. The initial step of recycling the wet waste 7 is for the waste carrier 8 to transport the wet waste 7 to the location of the wet waste recycling system 1, represented by step 1 in Figure 1. The process of recycling the vet waste 7 depends on its composition and so waste from toad sweepers containing large solids 20 are typically treated with an additional step compared to waste such as sludge held in tankers. The additional step for toad sweepers includes removing large solids 20 from the water so as to produce sludge. This is achieved by using the hydraulic lifting vessel, HTC 2, as indicated by step la in Figure 1 and shown in Figure 2, wherein the road sweeper 8 empties its wet waste into the HTC 2.
By doing so, waste water drains through filtration ports located around the base of the HTC and accumulates in a holding tank. Remaining in the HTC 2 is dewatered large solids which are left to amass through further disposal of wet waste until the HTC 2 has reached its capacity. Thereafter, the HTC 2 is tipped as seen in Figure 3, so as to transfer the solids 20 to a container 9 which can be transported to an appropriate disposal site.
The sludge held in the holding tank is thereafter transferred to the filtration / flocculation container 4 by the multi-pump unit 3. The multi-pump 3 is a multi -pump unit, in which the sludge is mixed with a biodegradable polymer (step 2 in Figure 1), in order to achieve flocculation of the sludge particles 21 in the filtration/flocculation container 4. The amount of polymer is adjusted by the multi-pump unit 3 and the polymer concentration needed to achieve optimal flocculation depends on the type of waste and its viscosity. The multi-pump unit 3 is equipped with a control panel 11 with control buttons for starting and stopping the pump, and is further provided with a level controlled water valve to prevent the filtration/flocculation container from over flowing.
The filtration/flocculation container 4 is a sludge dewatering system and is indicated as step in Figure 1. The filtration/flocculation container comprises a sealed housing and the waste water/polymer mixture pumped from the multi-pump unit 3 enters a central compartment of the filtration/flocculation container 4 via an inlet valve 12 as seen in Figure 5. Filtering screens 13 are located on the sides and the middle of the filtration/flocculation container 4 so as to ensure sufficient drainage of the water. As flocculation occurs in the filtration/flocculation container 4, the water is separated from the sludge particles 21 and exits the filtration/flocculation container 4 via an outlet valve 14. The coagulated solids form a dry cake which remains in the filtration/flocculation container 4 and is removed once a critical mass has been reached. The filtration/flocculation container 4 may further be provided with a sampling tap 15 for testing the water and inspection hatchets 16 for visually examining the flocculation process.
In contrast to other dewatering systems, the filtration/flocculation container 4 according to the present invention does not require pressure, compression or vacuum and so purer reject water can be obtained.
The reject water from the filtration/flocculation container is further processed in the filtration and sterilisation unit 5, in which the reject water passes through self-cleaning filters 25 and ultra-violet light filtration systems 26 (step 4 in Figure 1) in order to remove particulates 22 and to sterilise the water. The water is then transferred to the recycled water tank 6 so as to be reused in road sweepers and tankers (step 5 in Figure 1). A switch board 27 may be employed to control the level of water in the recycled water tank 6 as can be appreciated from Figure 5. The switch board 24 may be operated such that when the recycled water tank 6 is full a valve 28 connected to the filtration/flocculation container 4 closes so as to stop water from the filtration/flocculation container 4 passing through the filtration and sterilisation unit 5 into the recycled water tank 6, and a valve 29 connected to the recycled water tank opens to allow the stored clean watet to be continuously circulated through the ultraviolet filtration system 26. Moreover, when the water level in the recycled water tank is low the valve 29 of the recycled water tank 6 is closed and the valve 28 of the filtration/flocculation container 4 is opened so as to allow water from the filtration/flocculation container 4 to pass through the filtration and sterilisation unit 5 and fill up the recycled water tank 6.
When recycling wet waste from tankers the step of using the HTC (step 1 a) is generally not required as the wet waste does not contain large solids 20, therefore the waste is pumped directly from the tanker through the multi-pump unit 3 to the filtration/flocculation container 4.
The present invention allows for the transportation of waste to be minimised, as the total volume of waste is reduced. It is estimated that the volume of waste can be reduced up to 8O% when employing the present wet waste recycling system. As a result, fewer trips are required to remote landfill sites and so transportation costs and working hours spent on transferring the waste to remote landfill sites may be reduced. Furthermore, as the water is treated by filtration and sterilisation processes, the level of toxins and other contaminants released into the environment is significantly decreased. A further advantage of the present invention is that the recycled water is of such a purity that it can be reused in tankers and road sweepers, and so it does not overstrain diminishing water resources. It shall therefore be appreciated that the present wet waste recycling system may significantly contribute to the reduction of environmental impact of waste disposal.
It shall also be understood that the mobility of the wet waste recycling system enables it to be installed in close proximity to the site of operation. For example, the units of the system can be transported to a construction site, assembled for temporary use, and then removed when the services are no longer required. Alternatively, the wet waste recycling system can be set up for permanent use close to the treatment site.
It is envisaged that the present invention can be employed for treating street cleaning residues from road sweepers, sewage, septic tank sludge, quarry spoil, gully emptying, sand, silt and sludge from on-site effluent treatment. Therefore, the present invention can be valuable to many sectors including major construction companies, local authorities, airport airside contractors and the domestic market.
Although embodiments of the invention have been shown and described, it will be appreciated by those persons skilled in the art that the foregoing description should be regarded as a description of preferred embodiments only and that other embodiments that fall within the scope of the appended claims are considered to
form part of this disclosure.
Claims (5)
- Claims 1. A wet waste recycling system comprising a plurality of portable units connected to each other at or close to a treatment site, including a multi-pump unit for introducing a polymer into wet waste so as to form a mixture, a filtration/flocculation container which receives the mixture and in which flocculation of the mixture occurs such that water is separated from solids contained in said mixture, a filtration unit which receives and filters the water separated from the solids, and a sterilisation unit for sterilising the filtered water.
- 2. A wet waste recycling system according to claim 1, further comprising a high tip container which removes larger solids from the wet waste prior to transfer of the wet waste into the multi-pump unit.
- 3. A wet waste recycling system according to claim I or claim 2, wherein the multi-pump unit pumps the mixture into the filtration/flocculation container.
- 4. A wet waste recycling system according to claim 3, wherein the multi-pump unit comprises a valve for controlling the flow of mixture to the filtration/flocculation container.
- 5. A wet waste recycling system according to any preceding claim, wherein the multi-pump unit comprises a control panel fot starting and stopping the multi-pump unit.7. A wet waste recycling system according to any preceding claim, wherein the filtration/flocculation container comprises an inlet for receiving the mixture and an outlet for discharging the separated water.8. A wet waste recycling system according to claim 7, wherein the separated watet is transferred from the filtration/flocculation container to the filtration and sterilisation unit.9. A wet waste recycling system according to claim 8, wherein the filtration and sterilisation unit comprises ultraviolet light system for sterilising the water.10. A wet waste recycling system according to claim 9, further comprising a recycled water tank for storing water that has been filtered and sterilised.11. A wet waste recycling system according claim 10, comprising a switch board, a valve controlling the flow of separated water from the filtration/flocculation container to the filtration and sterilisation unit, and a valve controlling circulation of water of the recycled water tank through the ultraviolet light system.12. A wet waste recycling system according to claim 11, wherein the switch board is configured to close the valve of the filtration/flocculation container and open a valve of the recycled water tank when the recycled water tank is full so as to stop the recycling water tank from overflowing and to allow for the water in the recycled water tank to circulate through the ultraviolet light system, the switch board being further configured to open the valve to the filtration/flocculation container and close the valve to the recycled water tank when the water level in the recycled tank is low such that the separated water flows from the filtration/flocculation container through the filtration and sterilisation unit to the recycled water tank.13. A wet waste recycling system according to any preceding claim, wherein the multi-pump unit, filtration/flocculation container, filtration and sterilisation unit are mobile and removably attachable to one another via releasable pipework.14. A wet waste recycling system according to any preceding claim, wherein the polymer introduced into the wet waste is a biodegradable polymer.15. A wet waste recycling system according to any preceding claim, wherein two or more of said portable units are disposed on a vehicle and connected for use whilst on said vehicle.16. A wet waste recycling system as hereinbefore described, with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0919227A GB2475047B (en) | 2009-11-03 | 2009-11-03 | Wet waste recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0919227A GB2475047B (en) | 2009-11-03 | 2009-11-03 | Wet waste recycling system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0919227D0 GB0919227D0 (en) | 2009-12-16 |
| GB2475047A true GB2475047A (en) | 2011-05-11 |
| GB2475047B GB2475047B (en) | 2015-01-14 |
Family
ID=41435054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0919227A Active GB2475047B (en) | 2009-11-03 | 2009-11-03 | Wet waste recycling system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2475047B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2339425A (en) * | 1998-07-11 | 2000-01-26 | Clearmasters Environmental Lim | De-watering apparatus |
| FR2821072A1 (en) * | 2001-02-22 | 2002-08-23 | Cie Du Dev Durable | Transportable installation for producing drinking water comprises four sections carried in one or more standard containers |
| US20020139754A1 (en) * | 2001-02-16 | 2002-10-03 | Miller Olen O. | Method and apparatus for dewatering coal tailings and slurries and removing contaminants therefrom |
| JP2003175397A (en) * | 2001-09-25 | 2003-06-24 | Itakura Kogyo:Kk | Water purification method, solid flocculation-filter medium and water-purification device |
| WO2004039734A1 (en) * | 2002-10-29 | 2004-05-13 | Greenfield Holding Gmbh | Device and method for processing liquid manure by means of electroflotation |
| FR2873135A1 (en) * | 2004-07-13 | 2006-01-20 | Assainissement Rationnel Et De | Cesspit emptying truck with pump and tank has system for flocculating and dehydrating waste for more convenient storage and transport |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1551021A1 (en) * | 1965-11-08 | 1970-01-02 | Fives Penhoet Soc | Forced circulation heat exchanger |
| DE4311837A1 (en) * | 1993-04-10 | 1994-10-13 | Moos Simon Maskin | Method and device for processing and / or dewatering the sludge water removed from sewage pits, in particular small sewage treatment plants |
-
2009
- 2009-11-03 GB GB0919227A patent/GB2475047B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2339425A (en) * | 1998-07-11 | 2000-01-26 | Clearmasters Environmental Lim | De-watering apparatus |
| US20020139754A1 (en) * | 2001-02-16 | 2002-10-03 | Miller Olen O. | Method and apparatus for dewatering coal tailings and slurries and removing contaminants therefrom |
| FR2821072A1 (en) * | 2001-02-22 | 2002-08-23 | Cie Du Dev Durable | Transportable installation for producing drinking water comprises four sections carried in one or more standard containers |
| JP2003175397A (en) * | 2001-09-25 | 2003-06-24 | Itakura Kogyo:Kk | Water purification method, solid flocculation-filter medium and water-purification device |
| WO2004039734A1 (en) * | 2002-10-29 | 2004-05-13 | Greenfield Holding Gmbh | Device and method for processing liquid manure by means of electroflotation |
| FR2873135A1 (en) * | 2004-07-13 | 2006-01-20 | Assainissement Rationnel Et De | Cesspit emptying truck with pump and tank has system for flocculating and dehydrating waste for more convenient storage and transport |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0919227D0 (en) | 2009-12-16 |
| GB2475047B (en) | 2015-01-14 |
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