EP4139063A1 - Waste recycling process - Google Patents
Waste recycling processInfo
- Publication number
- EP4139063A1 EP4139063A1 EP21708969.7A EP21708969A EP4139063A1 EP 4139063 A1 EP4139063 A1 EP 4139063A1 EP 21708969 A EP21708969 A EP 21708969A EP 4139063 A1 EP4139063 A1 EP 4139063A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- binding agent
- waste
- recycling waste
- waste according
- 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.)
- Pending
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000004064 recycling Methods 0.000 title claims abstract description 40
- 239000011230 binding agent Substances 0.000 claims abstract description 49
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 32
- 238000000465 moulding Methods 0.000 claims description 16
- 238000010297 mechanical methods and process Methods 0.000 claims description 15
- 230000005226 mechanical processes and functions Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 9
- 239000011575 calcium Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000000843 powder Substances 0.000 description 12
- 239000008187 granular material Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000010797 grey water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- -1 or sand-like Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000004758 synthetic textile Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/21—Agglomeration, binding or encapsulation of solid waste using organic binders or matrix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B17/0404—Disintegrating plastics, e.g. by milling to powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/30—Mixed waste; Waste of undefined composition
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
- C08K11/005—Waste materials, e.g. treated or untreated sewage sludge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/042—Mixing disintegrated particles or powders with other materials, e.g. with virgin materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0468—Crushing, i.e. disintegrating into small particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0484—Grinding tools, roller mills or disc mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0488—Hammers or beaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/26—Scrap or recycled material
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the present invention is concerned with a recycling process. More particularly, the present invention is concerned with an improved recycling process for unsorted waste, for example waste generated by the retail industry. The present invention is also concerned with a method of manufacturing three dimensional objects from unsorted waste, for example waste generated by the retail industry.
- Waste generated by the retail industry includes items which have been manufactured from polymeric materials, glass, synthetic fabrics, natural fabrics (such as cotton and leather), as well as metals.
- the items include packaging (for example carrier bags, boxes and other containers), discarded stock (such as clothes, bags and shoes) and discarded merchandising items or fixtures and fittings from a shop (for example display boards).
- Incineration is an alternative process for unsorted waste.
- the waste is burned and converted into ash, flue gas and heat.
- Gaseous and particulate pollutants must be removed from the flue gas before the flue gas is released into the environment.
- Some systems are set up to generate electric power from the generated heat.
- Recycling is a popular alternative to burying or incinerating waste. Recycling processes generally aim to save material, minimise energy usage and reduce the pollution of soil, water or air. Waste that is to be recycled is typically sorted and cleaned prior to reprocessing into new materials and products. The sorting and cleaning of waste is either carried out manually or with the use of automated systems. Each of these sorting methods increases the cost and reduces the economic efficiency of recycling as an approach to waste processing.
- a method of recycling waste wherein the method of recycling waste includes mechanically processing the waste and mixing the mechanically processed waste with a binding agent.
- the waste is unsorted waste.
- unsorted waste we mean waste that includes a variety of unsorted waste items, including different products and packaging made from a range of materials including glass, plastic, metal and fibrous materials.
- the range of materials may include a mixture of natural and man-made, or synthetic, materials.
- the step of mechanically processing the waste may include using more than one mechanical process, thereby using more than one machine or piece of equipment.
- the step of mechanically processing the waste may, for example, include using a first mechanical process and a second mechanical process, wherein the second mechanical process is different to the first mechanical process.
- the first mechanical process may, for example, be a shredding process.
- the shredding process may be carried out using an industrial shredder or grinder.
- the first mechanical process may result in the formation of a granular material having a first particle size in the range of 0.5 millimetres to 20 millimetres.
- the second mechanical process may, for example, be a crushing or pulverising process.
- the crushing or pulverising process may be carried out using a hammer mill.
- the second mechanical process may result in the formation of a powder having a second particle size in the range of 0.005 millimetres to 0.4 millimetres.
- the step of mechanical processing the waste can advantageously be optimised to form a fine, sand like, material which can be used as an alternative to natural sand. This offers a further environmental benefit as natural sand is a non-renewable resource.
- binding agent we mean a component or agent which enables the granular and powder materials which are formed from the waste (the mechanically processed waste) to be bound or adhered together to form a solid material.
- the mixture of the mechanically processed waste and the binding agent may include at least 40% binding agent.
- the mixture of the mechanically processed waste and the binding agent includes at least 50 wt% binding agent and/or less than 75 wt% binding agent.
- the binding agent may include an organic binding agent.
- the binding agent may include an inorganic binding agent.
- the binding agent may include a first component and a second component.
- the binding agent may include at least 65 wt% of the first component and/or less than 85 wt% of the first component.
- the first component may include calcium, for example calcium carbonate.
- the second component may include calcium, for example calcium sulphate hemihydrate.
- the mixture of the mechanically processed waste and the binding agent may be further mixed with a liquid to form a moulding material.
- the liquid may include water, for example waste water.
- the waste water may preferably be non-sewage waste water, such as surface water (i.e. collected rain water) or grey water (water that originates from non-toilet or food fixtures).
- the method of recycling waste may further include adding a pigment to the moulding material.
- the pigment may be added to the moulding material as a solid material (for example in granule or powder form) or as a liquid.
- the method of recycling waste may further include pouring the moulding material into a mould.
- the method may further include curing the moulding material in the mould to form a three dimensional object.
- Figure 1 is a flow chart a method of recycling waste according to the present invention
- Figure 2a is a schematic side view of a mould for casting a three dimensional object
- Figure 2b is a schematic side view of the mould of Figure 2a into which moulding material has been poured.
- Figure 3c is a schematic side view of the mould of Figure 2b with the moulded object removed.
- waste 22 is collected into a suitable container (not shown).
- the waste 22 includes a variety of unsorted waste items, including different products and packaging made from a range of materials including glass, plastic, metal and fibrous materials.
- the range of materials may include a mixture of natural and man-made, or synthetic, materials.
- the waste 22 is broken down into granular material 24 by a shredding process.
- the shredding process may be carried out using any suitable machine such as an industrial shredder or grinder.
- the resulting granular material 24 has an average particle size in the range of 0.5 millimetres to 20 millimetres.
- the granular material 24 is crushed or pulverised into a fine powder, or sand-like, material 26.
- the pulverising step may be carried out using any suitable machine such as a hammer mill.
- the resulting powder 26 has an average particle size in the range of 0.005 millimetres to 0.4 millimetres.
- the powder 26 is mixed with a binding agent 28, for example an inorganic binding agent such as an inorganic binding agent including calcium.
- the inorganic binding agent including calcium may include a mixture of one or more of calcium carbonate, calcium sulphate (e.g. calcium sulphate hemihydrate), calcium oxide and calcium hydroxide.
- the inorganic binding agent including calcium may be provided in the form of limestone, lime, cement, plaster of Paris or gypsum.
- the resulting mixture of the powder 26 and the binding agent 28 includes 25 to 75 wt% of the binding agent.
- the binding agent 28 may be a mixture of two components.
- One or both of the two components may be an inorganic binding element, such as an inorganic binding element including calcium.
- the first component may, for example, be calcium carbonate.
- the second component may be, for example, calcium sulphate hemihydrate.
- the binding agent 28 may include 65 wt% to 85 wt% of the first component.
- Calcium sulphate hemihydrate advantageously reduces the time taken for the mixture to cure or bind together.
- the powder 26 and the binding agent 28 are combined with a liquid to form a mixture 30.
- the liquid may be water, for example waste water.
- waste water we mean non-sewage waste water, such as surface water (i.e. collected rain water) or grey water (water that originates from non-toilet or food fixtures).
- the resulting moulding material 30 may include 20 vol% to 40 vol% of the liquid.
- the components of the binding agent 28 react with the water to ensure that the particles of the powder 26 are bound together.
- FIG. 2a there is shown a mould 32.
- the mould 32 has a body 34 having an upper surface 36 in which a cavity 38 is formed.
- moulding material 30 is transferred into the cavity 38 of the mould 32.
- the moulding material 30 is cured at approximately 15 to 25 °C for between 10 and 30 minutes to form a moulded or cast object 40, as shown in Figure 2c.
- the components of the binding agent 28 are selected to ensure that the moulded or cast object 40 can be formed within a reasonable period of time and that the finished product has the required mechanical properties for its intended application or use.
- Calcium sulphate hemihydrate has, for example, been found to reduce the time taken for the moulded or cast object 40 to cure or bind.
- the calcium sulphate hemihydrate has been found to act as a stabiliser, thereby preventing degradation of the moulded or cast object 40.
- the invention enables unsorted waste (including items manufactured from a variety of different materials) to be repurposed into other items.
- unsorted waste including items manufactured from a variety of different materials
- examples of such repurposed, three dimensional, items include bricks, shop fittings (such as table tops) and mannequins. It will be understood that the moulded or cast object 40 could be any three dimensional shape.
- a pigment or dye may be added to the process in order to ensure that objects cast from the moulding material 30 are a particular colour.
- the pigment or dye may, for example, be added to the process at step 16, when the powder 26 is combined with the binding agent 28, or at step 18, when the powder 26 and the binding agent 28 are mixed with the water.
- the pigment or dye may be added to the moulding material 30 prior to the casting process.
- the pigment may be added to the moulding material as a solid material (for example in granule or powder form) or as a liquid.
- the binding agent 28 is an inorganic binding agent, such as an inorganic binding agent including calcium.
- an organic binding agent such as a polymer or a resin, may be used as the binding agent.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2002797.5A GB2592418A (en) | 2020-02-27 | 2020-02-27 | Recycling process |
PCT/EP2021/054826 WO2021170800A1 (en) | 2020-02-27 | 2021-02-26 | Waste recycling process |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4139063A1 true EP4139063A1 (en) | 2023-03-01 |
Family
ID=70278586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21708969.7A Pending EP4139063A1 (en) | 2020-02-27 | 2021-02-26 | Waste recycling process |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4139063A1 (en) |
GB (1) | GB2592418A (en) |
WO (1) | WO2021170800A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1771020A1 (en) * | 1968-03-18 | 1972-01-05 | Jung Gmbh Lokomotivfab Arn | Process for recycling waste and device for shredding waste |
FR2248994A1 (en) * | 1973-10-25 | 1975-05-23 | Lazareth Fils Ets | Method of treating waste material - involves grinding and mixing with water and binder before moulding |
FR2671747A1 (en) * | 1991-01-21 | 1992-07-24 | Lozano Jean Claude | Composite material |
GB2254322A (en) * | 1991-04-02 | 1992-10-07 | Maddox Derek | A method of producing a building material |
DE4122334A1 (en) * | 1991-07-05 | 1993-01-07 | Zementanlagen Und Maschinenbau | METHOD AND SYSTEM FOR TREATING MINERAL WOOL WASTE |
SG41947A1 (en) * | 1992-06-09 | 1997-08-15 | Matrix Tech Pty Ltd | Treatment of waste materials for disposal |
GB2294926A (en) * | 1994-11-12 | 1996-05-15 | Peter Thomas | Structural material from waste |
MX2018005746A (en) * | 2018-05-07 | 2019-11-08 | Divier Benjamin Barreto Chavez | Integral industrial process for the low-cost conversion of municipal solid waste into a construction material suitable for human use. |
-
2020
- 2020-02-27 GB GB2002797.5A patent/GB2592418A/en active Pending
-
2021
- 2021-02-26 EP EP21708969.7A patent/EP4139063A1/en active Pending
- 2021-02-26 WO PCT/EP2021/054826 patent/WO2021170800A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2021170800A1 (en) | 2021-09-02 |
GB2592418A (en) | 2021-09-01 |
GB202002797D0 (en) | 2020-04-15 |
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