GB2483426A - Manufacturing pellets or bricks from damp digested waste material - Google Patents

Manufacturing pellets or bricks from damp digested waste material Download PDF

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Publication number
GB2483426A
GB2483426A GB1009976.0A GB201009976A GB2483426A GB 2483426 A GB2483426 A GB 2483426A GB 201009976 A GB201009976 A GB 201009976A GB 2483426 A GB2483426 A GB 2483426A
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GB
United Kingdom
Prior art keywords
waste material
pellets
damp
digested
drum
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Withdrawn
Application number
GB1009976.0A
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GB201009976D0 (en
Inventor
Brian David Ferbrache
Jason Baudains
Nigel John Leale
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Individual
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Individual
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Publication date
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Priority to GB1009976.0A priority Critical patent/GB2483426A/en
Publication of GB201009976D0 publication Critical patent/GB201009976D0/en
Publication of GB2483426A publication Critical patent/GB2483426A/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C10L5/36—Shape
    • C10L5/361—Briquettes
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • A01G9/029—Receptacles for seedlings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
    • A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
    • A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
    • A01G24/40—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure
    • A01G24/44—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form
    • A01G9/10—
    • 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
    • C05F17/02—
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/90—Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F3/00—Fertilisers from human or animal excrements, e.g. manure
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/14—Tablets, spikes, rods, blocks or balls
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/08—Methods of shaping, e.g. pelletizing or briquetting without the aid of extraneous binders
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C10L5/36—Shape
    • C10L5/363—Pellets or granulates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/403—Solid fuels essentially based on materials of non-mineral origin on paper and paper waste
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y02P20/145—Feedstock the feedstock being materials of biological origin
    • 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
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Pest Control & Pesticides (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

A method of manufacturing pellets from damp digested waste material comprises putting the waste material in a rotatable drum, and turning the drum to tumble the contents until the damp waste material has formed pellets having a desired size range. A method of manufacturing a brick from damp digested waste material comprises putting the waste material in a mould, and applying pressure to the waste material to remove at least some of the water content. The pellets or bricks may be used as a fuel or as a plant growth medium or fertiliser. Another aspect of the invention provides apparatus for manufacturing pellets from damp digested waste material, comprising a rotatable drum having an opening at one end, and a screen in a side surface thereof, having openings to allow particles below a predetermined size to pass through.

Description

METHOD AND APPARATUS
BACKGROUND
a. Field of the Invention
The present invention relates to a method of manufacturing pellets or bricks from organic waste, and to apparatus for use in an embodiment of the method.
b. Related Art Pelleted materials for animal feed or fuel are made by the compression of fine material. The size of the material can be controlled by screening and comminution devices.
Compared to non-pelleted material, pellets provide ease of transport and storage, and can be used in suitable apparatus.
The pelletising process of compression involves special machinery and considerable use of energy, which imposes a relatively high cost over non-pelleted materials.
SUMMARY OF THE INVENTION
Aspects of the invention are specified in the independent claims. Preferred features are specified in the dependent claims.
We have found that digested organic waste can be turned into pellets or bricks suitable for use as a fuel or in other applications, using simple apparatus and relatively little energy.
The organic waste is preferably anaerobically digested, for example by a process and apparatus as described in WO 96123054. However it will be understood that other digested waste, for example composted waste, may alternatively be used.
We have found that the anaerobic digestion process creates a strong adhesive effect on the fibre of the waste material, making it particularly suitable for forming into pellets and/or bricks.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be further described, by way of example only, with reference to the following drawings, in which: Figure 1 is a front view of apparatus for making pellets in accordance with an embodiment of the invention; Figure 2 is a side view of the apparatus of Figure 1; Figure 3 shows pellets made by a method in accordance with an aspect of the invention; Figure 4 shows the pellets of Figure 3 used as a fuel; Figure 5 illustrates stages in a process in accordance with another embodiment of the invention; Figures 6 and 7 show apparatus for making bricks in accordance with another aspect of the invention; and Figure 8 shows a brick made using the apparatus of Figures 6 and 7.
DETAILED DESCRIPTION
To prepare anaerobically digested organic waste, apparatus and a method in accordance with WO 96/23054 was used. The waste may comprise materials selected from green waste, food waste, cardboard, paper, horse manure or other manure; essentially, anything that will rot. The waste may consist essentially of a single type of waste, or a number of waste types may be mixed and digested together.
Collected materials are run through a high-powered shredder and chopper pump to reduce the material to a preferred size, for example 20 mm. The shredded chopped material is then added to the anaerobic digester containing active anaerobic bacteria. We have used a BioplexTM PCi digester, but any make or size of digester may be used depending on the amount of material to be digested.
Water is optionally added to the shredded, chopped waste and the mixture is heated to current DEFRA standard and maintained at that temperature for six hours or more depending on the nature of the waste material. The free liquid phase is then removed and stored for use with the next batch.
The remaining digested damp solids are then aerobically composted for a period depending on climate conditions before forming into pellets or bricks.
Referring to Figure 1, apparatus for preparing pellets from digested waste comprises means for tumbling the waste in a controlled manner, in this example a modified cement mixer 1. The apparatus comprises a drum 2, rotatably mounted on a frame 5. The diameter of the drum 2 is not critical and will depend on the volume of waste to be pelletised. In this example the drum diameter is about 600 mm; a preferred diameter is in the range about 30 mm to about 1000 mm. The inside surface 3 of the drum 2 has a grip surface and is accessible through an end opening 2a for loading of digested waste and removal of pellets after processing.
The drum 2 has an optional side opening 6 (Figure 2), which in this embodiment is covered by a mesh of about 600 mm x 130 mm. The mesh has holes of size mm x 12 mm. The apparatus 1 may be portable or static, and the drum 2 may be turned in either direction by any suitable means, for example an electric motor or a shaft driven by an external motor or by hand.
To prepare pellets, the digested waste is loaded in the drum 2 and then tumbled by turning of the drum. We have found that the turning speed is not important: the process works at fast or slow speeds. The turning process causes unwanted materials such as small stones and twigs to fall out through the mesh 4 to be discarded or used in another process. The turning of the drum causes the damp waste material to bind together and form pellets 7 (Figure 3). Longer turning times for the drum 2 produces bigger pellets, with diameters ranging from as small as about 3 mm, typically about 10 mm to about 100 mm.
The finished pellets are tipped out of the drum 2 and dried or allowed to dry. Once dry, the pellets 7 can be burnt in an open fire 8 (Figure 4), or in other burners such as a log burner or a biomass boiler.
The pellets 7 provide a source of renewable energy, fibre and nutrients. They may alternatively be used as some or all of a plant growth medium or fertiliser material.
For example, one or more pellets 7 may be used in a flowerpot and will expand when water is added. For making pellets 7 to be used in such applications, additional plant nutrients, for example an NPK composition, may be added either during the preceding digestion process or to the digested waste before or during the pelletising process.
We have surprisingly found that substantial quantities of waste paper may be optionally incorporated with the digested waste during manufacture of the pellets 7. Figure 5 illustrates stages in an embodiment of this process.
In this example, equal weights of digested horse stable manure 9 (prepared in accordance with WO 96/23054) and shredded paper 10 are used (Figure 5a). With both components 9,10 loaded in the drum 2, the drum 2 is turned to tumble the contents. Under the influence of the tumbling, the paper 10 breaks down within five to 10 minutes (Figure 5b) and combines with the digested waste 9. The paper disappears' (Figure Sc) within about 15 minutes, leaving damp pellets 7.
The formed pellets 7 are tipped out and allowed to dry. In this example, the pellets 7 were kept in a crate (Figure Sd). Drying behind a window took 10 to 15 days in late winter English weather. The final dried product is shown in Figure 5e. Larger pellets are particularly suitable for burning in open fires and stoves, smaller ones for wood chip stokers.
Another aspect of the invention provides a method of making bricks from the digested organic waste. We used a standard hydraulic bench-mounted press 12, standing in a catchment tray 15 (Figure 6). The press 12 includes a hydraulic ram 13, a pressure plate 14 for applying the ram's pressure over a larger area, and a base plate 20. A steel moulding box 16 (best shown in Figure 7) was filled with the digested waste 9 and placed between the pressure plate 14 and base plate 20.
The moulding box 16 has an open bottom end and a gap 18 at the bottom to allow liquid to escape during the formation of the brick. In this example the box is provided with blocks 17 to elevate it above the base plate 20, but it will be understood that the gap for allowing removal of liquid could be provided by other means, for example one or more apertures at the bottom of the box 16, optionally covered with a mesh. After filling the box 16 with digested material, we applied a pressure of 2 ton/square inch (about 31 MPa) using the hydraulic ram 13 via the pressure plate 14 until liquid substantially ceased to leave the material. The resulting brick 19 (Figure 8) had dimensions of about 210 mm x 80 mm x 160 mm.
It was removed from the box 16 and allowed to dry. When dry the brick 19 can be burnt on an open fire or a closed stove or log burner. Like the pellets, the bricks 19 may alternatively be used as a plant growth medium or a fertiliser medium.
Liquid drained from the digested material during brick formation is collected from the tray 15 and may be used as all or part of the liquid phase for use in digesting the next batch of waste material.
Optionally, organic material such as twigs, which passes through the mesh 4 during manufacture of the pellets 7, may be added to the waste used to make bricks 19. Stones are discarded.

Claims (5)

  1. CLAIMS1. A method of manufacturing pellets from damp digested waste material, the method comprising putting said waste material in a rotatable drum, and turning the drum to tumble the contents until the damp waste material has formed pellets having a desired size range.
  2. 2. A method according to claim 1, wherein the drum has a screen in a side surface thereof, having openings to allow particles below a predetermined size to drop out of the drum during tumbling.
  3. 3. A method according to claim 2, wherein the screen has a grid sized to allow particles of 10 mm or less to pass through during tumbling of the waste material.
  4. 4. A method according to any preceding claim, further comprising adding shredded paper to the damp waste material before or during tumbling, whereby the pellets that are formed comprise a mixture of digested waste material and paper.
  5. 5. A method according to any preceding claim, further comprising the step of drying the pellets or allowing the pellets to dry.7. A method according to any preceding claim, wherein the waste material is obtained from the solid phase of an anaerobic digester.8. A method according to claim 7, further comprising the step of preparing the digested waste material by shredding or chopping solids waste material to a preferred size, adding the solids to a liquid containing active anaerobic bacteria, and anaerobically digesting the solid waste material for at least six hours.9. A method according to claim 7 or claim 8, wherein the waste material is subjected to composting after anaerobic digestion.10. A method according to any preceding claim, wherein the pellets have diameters in the range 10 to 100 mm.11. Apparatus for carrying out the method of claim 2, the apparatus comprising a rotatable drum having an opening at one end, and a screen in a side surface thereof, having openings to allow particles below a predetermined size to pass through.12. Apparatus according to claim 11, wherein the screen has a grid sized to allow particles of 10 mm or less to pass through.13. A method of manufacturing a brick from damp digested waste material, the method comprising putting said waste material in a mould, and applying pressure to the waste material to remove at least some of the water content.14. A method according to claim 13, further comprising removing the brick from the mould and drying it or allowing it to dry.15. Use of pellets manufactured by the method of claim 1, or bricks manufactured by the method of claim 13, as a fuel.16. Use of pellets manufactured by the method of claim 1, or bricks manufactured by the method of claim 13, as a plant growth medium or plant fertiliser.
GB1009976.0A 2010-06-15 2010-06-15 Manufacturing pellets or bricks from damp digested waste material Withdrawn GB2483426A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995611A1 (en) * 2012-09-14 2014-03-21 Christian Jean Marie Durand Fuel, useful in a wood or coal based heating apparatus, comprises biomass waste and paper pulp that are shaped and dried to form the fuel behaving like a coal
CN105457992A (en) * 2016-02-05 2016-04-06 孙金海 Domestic waste treatment method and device
CN108341655A (en) * 2018-04-28 2018-07-31 白文礼 The process of building brick is made using waste inorganic refuse as raw material
WO2020165783A1 (en) * 2019-02-13 2020-08-20 FORNO PARRA, Juan Pablo Method for producing a firewood or wood briquette substitute derived from cellulose fibre from wood pulp
WO2022094653A1 (en) * 2020-11-03 2022-05-12 Garry Kenneth Eglinton Fertiliser ring, method and production

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FR2995611A1 (en) * 2012-09-14 2014-03-21 Christian Jean Marie Durand Fuel, useful in a wood or coal based heating apparatus, comprises biomass waste and paper pulp that are shaped and dried to form the fuel behaving like a coal
CN105457992A (en) * 2016-02-05 2016-04-06 孙金海 Domestic waste treatment method and device
CN108341655A (en) * 2018-04-28 2018-07-31 白文礼 The process of building brick is made using waste inorganic refuse as raw material
WO2020165783A1 (en) * 2019-02-13 2020-08-20 FORNO PARRA, Juan Pablo Method for producing a firewood or wood briquette substitute derived from cellulose fibre from wood pulp
WO2022094653A1 (en) * 2020-11-03 2022-05-12 Garry Kenneth Eglinton Fertiliser ring, method and production

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