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WO2021087584A1 - Digesteur aérobie rotatif - Google Patents

Digesteur aérobie rotatif Download PDF

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Publication number
WO2021087584A1
WO2021087584A1 PCT/BR2020/050199 BR2020050199W WO2021087584A1 WO 2021087584 A1 WO2021087584 A1 WO 2021087584A1 BR 2020050199 W BR2020050199 W BR 2020050199W WO 2021087584 A1 WO2021087584 A1 WO 2021087584A1
Authority
WO
WIPO (PCT)
Prior art keywords
waste
fact
rotary aerobic
separator
rotary
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.)
Ceased
Application number
PCT/BR2020/050199
Other languages
English (en)
Portuguese (pt)
Inventor
Antonio Cicero de Lima PRADO
Verner Washington CARDOSO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2021087584A1 publication Critical patent/WO2021087584A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/16—Treatment of sludge; Devices therefor by de-watering, drying or thickening using drying or composting beds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor

Definitions

  • the present invention relates to a rotary aerobic digester for drying and / or dehydrating materials with a high organic load, or predominantly organic, such as solid urban waste, agricultural materials, sewage sludge, pruning waste, as well as combination of these residues, and still other biomasses to be studied, reaching as results, the substantial reduction of volume and weight, the elimination of bacteria present in the treated residues, the reuse of discarded materials and / or the valorization of residues.
  • a rotary aerobic digester for drying and / or dehydrating materials with a high organic load, or predominantly organic, such as solid urban waste, agricultural materials, sewage sludge, pruning waste, as well as combination of these residues, and still other biomasses to be studied, reaching as results, the substantial reduction of volume and weight, the elimination of bacteria present in the treated residues, the reuse of discarded materials and / or the valorization of residues.
  • the digester operates on a plant in continuous flow.
  • the National Solid Waste Policy provides for the prevention and reduction of waste generation, with the proposal of practicing sustainable consumption habits and a set of instruments to increase the recycling and reuse of solid waste. (what has economic value and can be recycled or reused) and the environmentally appropriate disposal of waste (what cannot be recycled or reused).
  • GB2431155 for example, teaches a rotary aerobic digester that operates in a thermophilic phase at a temperature in the range 60-75 ° C, with oxygen content of the gas in contact with the material to be treated is kept at a level above 5% by volume, to produce a treated material with a moisture level of not more than 45% by weight, more preferably not more than 35% by weight and more preferably not more than 25% by weight.
  • the treated material can subsequently be dried on a drying floor to provide a stable product.
  • Waste with a high level of humidity such as household waste, is mixed in a mixer with waste with a lower level of humidity, such as commercial waste, to provide control of the properties of the waste to be treated and the product obtained.
  • the mixed solid organic waste treated from the aerobic digester can also be pyrolysed and, optionally, subsequently aerated.
  • the digester in document GB2431155 is unable to process any waste, and it is essential for its operation to mix various wastes to control the moisture content of the material that enters the digester.
  • the solution developed by the present invention makes use of the spontaneous increase in the temperature of the biomass through the kinetic energy caused by the friction of the materials in face of the rotation of the digester and its control using the injection of ambient air through a blower.
  • the control of the relationship between the rotation and the amount of air injected into the process allows the acceleration of the mesophilic, thermophilic and maturation phases of organic materials, exponentially reducing the time needed to treat the material, and obtaining biomasses as a result of this process. stabilized.
  • Such biomass still has aspects of use, compost for use as fertilizer and fuel derived from waste.
  • the energy recovery of waste becomes extremely viable, since during the digestion process the moisture contained in the material is eliminated along with the ambient air that was blown by the blower, the air, downstream of the digester. , enters a separator for recovery of particles to be reprocessed, crosses a mechanical separator where there is the recovery of water to be treated for reuse, and then reaches the filters for the elimination of odors, after which it is discharged into the air free of contaminants.
  • the digester is also provided with internal shovels to assist in the movement of materials, supported and moved by a drive set consisting of gearmotor, support rollers and running lanes.
  • the loading and unloading of the material to be treated is done through rotary valves and by material transport mechanisms, such as belt, chain or screw conveyors. Upstream of the digester's loading belt, it is still necessary to reduce the size of the material that can be done through crushers, mills or any other device that reduces or decomposes it into particles of maximum size of 50mm, which also upstream the even it is loaded by other material transport mechanisms. Thus, the process through the elimination of moisture multiplies the calorific value of the material, reaching values of up to 6,000 kcal / kg, depending on the composition of the incoming raw material.
  • figure 3 represents a perspective view.
  • the object of the present invention as well as its accessory equipment, are comprised of equipment for transporting bulk material (1), crusher or mill for reducing the size of materials to be processed ( 2), bulk material conveyor for loading material into the digester (3), rotary aerobic digester (4), air blower (5), particle recovery separator (6), mechanical separator water / air filter (7), odor removal filter (8), top opening with a loading lid (9), support rollers (10), drive set (11) and vanes for handling (12).
  • the system is controlled through a programmable logic controller, and after loading the lid is closed and the batch of processing begins.
  • the rotation of the digester is variable and controlled by automated systems depending on the temperature of the material, and the working range is between 0.1-5 RPM, the maximum allowed internal temperature is between 45-55 ° C.
  • the blower starts operating by blowing ambient air with flow according to the need for aeration and from then on, when entering the thermophilic phase, temperatures between 65-70 ° C and the bacterial activity ended . To reach maturity the air flow is increased, causing greater drag of moisture and a decrease in acidity.
  • the total estimated time for all processing is between 60-80 hours.
  • the inflated air is treated by three mechanical barriers in which, first, a high efficiency cicline recovers the entrained particles with the air stream, then the mechanical separation between water and air occurs and, before being directed to the chimney , air without moisture and particles passes through the filter to remove odors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fertilizers (AREA)

Abstract

L'invention concerne un digesteur pour séchage et/ou déshydratation de matières à haute charge organique, ou à prédominance organique, telles que des déchets urbains solides, des matières agricoles, des boues d'égout, des résidus de taille, ainsi qu'une combinaison de ceux-ci, outre d'autres biomasses à étudier. Il en résulte une réduction substantielle de volume et de poids, une élimination de bactéries présentes dans les résidus traités, une réutilisation des matières déversées et/ou une valorisation de déchets, avec une durée de traitement réduite et sans recours à des équipements auxiliaires de génération de chaleur.
PCT/BR2020/050199 2019-11-04 2020-06-04 Digesteur aérobie rotatif Ceased WO2021087584A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102019023148A BR102019023148B8 (pt) 2019-11-04 2019-11-04 digestor aeróbico rotativo
BR102019023148-3 2019-11-04

Publications (1)

Publication Number Publication Date
WO2021087584A1 true WO2021087584A1 (fr) 2021-05-14

Family

ID=70804195

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2020/050199 Ceased WO2021087584A1 (fr) 2019-11-04 2020-06-04 Digesteur aérobie rotatif

Country Status (2)

Country Link
BR (1) BR102019023148B8 (fr)
WO (1) WO2021087584A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002779A1 (fr) * 1982-02-15 1983-08-18 Peter Hood Procede de production d'un combustible a partir de dechets
WO2005063946A1 (fr) * 2003-12-31 2005-07-14 Iwi (Holdings) Limited Procede et appareil de traitement de dechets organiques melanges
US20170022522A1 (en) * 2015-07-20 2017-01-26 Anaergia Inc. Production of biogas from organic materials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002779A1 (fr) * 1982-02-15 1983-08-18 Peter Hood Procede de production d'un combustible a partir de dechets
WO2005063946A1 (fr) * 2003-12-31 2005-07-14 Iwi (Holdings) Limited Procede et appareil de traitement de dechets organiques melanges
US20170022522A1 (en) * 2015-07-20 2017-01-26 Anaergia Inc. Production of biogas from organic materials

Also Published As

Publication number Publication date
BR102019023148B1 (pt) 2020-11-24
BR102019023148B8 (pt) 2020-12-01
BR102019023148A2 (pt) 2020-05-19

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