GB2347411A - Sludge composting aerator - Google Patents

Sludge composting aerator Download PDF

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Publication number
GB2347411A
GB2347411A GB9904187A GB9904187A GB2347411A GB 2347411 A GB2347411 A GB 2347411A GB 9904187 A GB9904187 A GB 9904187A GB 9904187 A GB9904187 A GB 9904187A GB 2347411 A GB2347411 A GB 2347411A
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GB
United Kingdom
Prior art keywords
tubes
sludge
composting
hollow
volume
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
Application number
GB9904187A
Other versions
GB9904187D0 (en
GB2347411B (en
Inventor
Philip Wallace
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.)
LEVINGTON AGRICULTURE Ltd
Original Assignee
LEVINGTON AGRICULTURE Ltd
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 LEVINGTON AGRICULTURE Ltd filed Critical LEVINGTON AGRICULTURE Ltd
Priority to GB9904187A priority Critical patent/GB2347411B/en
Publication of GB9904187D0 publication Critical patent/GB9904187D0/en
Publication of GB2347411A publication Critical patent/GB2347411A/en
Application granted granted Critical
Publication of GB2347411B publication Critical patent/GB2347411B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • C05F17/964—Constructional parts, e.g. floors, covers or doors
    • C05F17/971—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material
    • C05F17/979—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material the other material being gaseous
    • 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
    • C05F17/40—Treatment of liquids or slurries
    • 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
    • C05F17/964—Constructional parts, e.g. floors, covers or doors
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Fertilizers (AREA)

Abstract

Hollow tubes are used to improve the aeration of compostable sludges that have insufficient porosity to allow an adequate oxygen supply to reach the whole bulk of the sludge. The hollow tubes contain air when mixed compared with a solid bulking agent, and they also allow increased passage of air through the sludge. The tubes may be used in varying proportions with the compostable sludge depending on its characteristics. However, the proportions used may be much smaller than other bulking agents (for example woodchips) due to the hollow and open-ended structure of the tubes.

Description

SLUDGE COMPOSTING AERATOR The invention relates to a process of aerating sludges for composting. In particular, the invention relates to the addition of hollow tubes, made of natural or synthetic materials, that are mixed with sludges of organic waste to be composted. The sludges on their own have insufficient porosity to allow an adequate air supply for the composting process to take place satisfactorily.
Composting is a well known process of converting organic matter into useful products to aid plant growth. Microbial activity breaks down organic wastes, and for this process to proceed in a controlled way to produce a beneficial product without emitting offensive odours in the process, air containing oxygen is required. The air supply must be adequate over a period of time, and moisture adequate but not excessive. Structural products may be added, such as wood chips, but they occupy a significant volume especially when in-vessel containerised composting systems are used.
We have discovered that by the addition of hollow tubes to sludge, air space is created that provides adequate oxygen for composting to commence satisfactorily. In combination with forced aeration into the sludge, the hollow tubes then allow the passage of air to replenish the oxygen supply within the mass of the sludge allowing composting to be completed satisfactorily.
The tubes can be used in a much smaller proportion of the composting volume compared with other materials, such as wood chips, due to the hollow and open-ended structure of the tubes.
The tubes may be made of natural or synthetic materials being long, hollow cylinders with open ends. The walls of the tubes may be curved, tapered or parallel and, in addition, may be solid, perforated or porous.
The dimensions of the tubes are for example 20 mm to 100 mm in length and 5 mm to 20 mm in outer diameter. The tubes may be mixed with the sludge at a rate of, for example, between 5 and 50 per cent by volume. The size of the tubes and the volume added to the sludge are chosen according to the characteristics of the sludge to be composted, and dimensions and rates may be greater or less than the examples stated.

Claims (8)

  1. Claims: 1. The process of the addition of hollow tubes to sludge, creating air space that provides adequate oxygen for composting to commence.
  2. 2. The process as claimed in Claim 1 wherein the passage of air into the sludge, facilitated by the tubes, replenishes the oxygen supply required for satisfactory composting to be completed.
  3. 3. The process as claimed in Claim 1 or 2 wherein the tubes are made of natural or synthetic materials being long hollow cylinders with open ends.
  4. 4. The process as claimed in any preceding claim wherein the walls of the tubes may be curved, tapered or parallel.
  5. 5. The process as claimed in any preceding claim of which the tube walls may be solid, perforated or porous.
  6. 6. The process as claimed in any preceding claim wherein the tubes are characterised with dimensions of, for example, 20 mm to 100 mm in length and 5 mm to 20 mm in outer diameter.
  7. 7. The process as claimed in any preceding claim characterised as a mixture of tubes and sludge at a rate of between 5 and 50 per cent by volume of the tubes.
  8. 8. The process as claimed in any preceding claim where the size of the tubes and the volume added to the sludge are chosen according to the characteristics of the sludge to be composted.
    8. The process as claimed in any preceding claim where the size of the tubes and the volume added to the sludge are chosen according to the characteristics of the sludge to be composted.
    Amendments to the claims have been filed as follows 1. The process of the addition of hollow tubes to sludge, creating air space that provides adequate oxygen for composting to commence.
    2. The process as claimed in Claim 1 wherein the passage of air into the sludge, facilitated by the tubes, replenishes the oxygen supply required for satisfactory composting to be completed.
    3. The process as claimed in Claim 1 or 2 wherein the tubes are made of natural or synthetic materials being long hollow cylinders with open ends.
    4. The process as claimed in any preceding claim wherein the walls of the tubes may be curved, tapered or parallel.
    5. The process as claimed in any preceding claim of which the tube walls may be solid, perforated or porous.
    6. The process as claimed in any preceding claim wherein the tubes are characterised with dimensions of 20 mm to 100 mm in length and 5 mm to 20 mm in outer diameter.
    7. The process as claimed in any preceding claim characterised as a random mixture of individual small tubes and sludge at a rate of between 5 and 50 per cent by volume of the tubes.
GB9904187A 1999-02-24 1999-02-24 Sludge composting aerator Expired - Fee Related GB2347411B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9904187A GB2347411B (en) 1999-02-24 1999-02-24 Sludge composting aerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9904187A GB2347411B (en) 1999-02-24 1999-02-24 Sludge composting aerator

Publications (3)

Publication Number Publication Date
GB9904187D0 GB9904187D0 (en) 1999-04-14
GB2347411A true GB2347411A (en) 2000-09-06
GB2347411B GB2347411B (en) 2001-02-14

Family

ID=10848367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9904187A Expired - Fee Related GB2347411B (en) 1999-02-24 1999-02-24 Sludge composting aerator

Country Status (1)

Country Link
GB (1) GB2347411B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991016282A1 (en) * 1990-04-12 1991-10-31 Biodata Oy Compostor
JPH0524961A (en) * 1991-07-18 1993-02-02 Pasuko Eng Kk Compost fermentation tank
WO1993002990A1 (en) * 1991-08-01 1993-02-18 Compost Technologies, Inc. Method for accelerated aerobic decomposition of vegetative organic waste material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991016282A1 (en) * 1990-04-12 1991-10-31 Biodata Oy Compostor
JPH0524961A (en) * 1991-07-18 1993-02-02 Pasuko Eng Kk Compost fermentation tank
WO1993002990A1 (en) * 1991-08-01 1993-02-18 Compost Technologies, Inc. Method for accelerated aerobic decomposition of vegetative organic waste material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WPI Abstract Accession No. 1993-080253[10] & JP 05 024 961 A *

Also Published As

Publication number Publication date
GB9904187D0 (en) 1999-04-14
GB2347411B (en) 2001-02-14

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee