EP0464193A1 - Traitement d'effluents de porcherie - Google Patents

Traitement d'effluents de porcherie

Info

Publication number
EP0464193A1
EP0464193A1 EP91903732A EP91903732A EP0464193A1 EP 0464193 A1 EP0464193 A1 EP 0464193A1 EP 91903732 A EP91903732 A EP 91903732A EP 91903732 A EP91903732 A EP 91903732A EP 0464193 A1 EP0464193 A1 EP 0464193A1
Authority
EP
European Patent Office
Prior art keywords
lime
liquid
effluent
piggery
recycled
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Withdrawn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
EP91903732A
Other languages
German (de)
English (en)
Other versions
EP0464193A4 (en
Inventor
Gregory Percival Fitzpatrick
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 EP0464193A1 publication Critical patent/EP0464193A1/fr
Publication of EP0464193A4 publication Critical patent/EP0464193A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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

Definitions

  • This invention relates to the treatment of piggery effluent .
  • Piggery effluent is generally high in phosphorus and if discharged without treatment will contaminate ground water, rivers, lakes and the like by encouraging the growth of algae and other aquatic plants.
  • Various processes for treating the effluent have been considered but most are too costly to implement on a commercial scale. For example, raw effluent has been treated by the addition of lime but because of the quantity of lime required the cost is prohibitive.
  • solid lime is added to the settling tank and mixed with the fines.
  • a lime sludge is formed and after settling thereof the liquid may be discharged or used for irrigation.
  • the solids removed by the screening and settling and the lime sludge may be used as fertiliser.
  • the quantity of lime required to treat the recycled effluent is consider ⁇ ably less than that required to treat non-recycled effluent.
  • the invention resides in a process for treating piggery effluent to reduce the phosphorus content comprising screening the effluent to remove the larger solid particles, separating the remaining fine solids by settling, recycling portion of the supernatant liquid through the piggery as flushing liquid whilst keeping the addition of fresh water to the system to a minimum, screening the recycled effluent to remove the larger solid particles, mixing the separated liquid and fines supernatant liquid with solid lime, separating the lime sludge formed and discharging the separated liquid to waste or irrigation.
  • Fig.l is a diagrammatic representation of a first embodiment of the process
  • Fig.2 is a graph showing the results of treatment of liquid from various stages of the process with two different types of lime.
  • Fig.3 is a diagrammatic representation of a further process clarifying the liquid before discharge to waste.
  • the effluent from the sheds 11 is passed into a sump 12 from where it is passed through a screen 13 to remove the larger solids.
  • the sepa ⁇ rated liquid with the entrained fines is then passed to a settling tank 14.
  • the substantially clear supernatant liquid flowing over the top of the tank 14 is passed to a tank 15 from where it is recycled as flushing liquid.
  • the recycled liquid again passes through the sump 12 and the screen 13 to remove any larger solid particles picked up during flushing.
  • the separated liquid passes to the settling tank 14.
  • the number of times the effluent liquid is recycled will be gov ⁇ erned by the size of the piggery and the amount of phosphorus can be retained by the solid particles.
  • solid lime in the form of lime kiln dust or hydrated lime is added to the tank 14 and mixed with the liquid and fines therein.
  • the mixture is passed to a settling tank 16.
  • a lime sludge is formed and settles to the bottom of the tank 16.
  • Substantially clear liquid is withdrawn from the vesseL 16 and discharged to waste or used for irrigation.
  • the lime sludge is dewatered and dried and may be used as fertiliser.
  • the larger solids removed by the screen 13 may be mixed with the lime sludge if desired, or used separately as a fertiliser.
  • the lime was added as it entered the vessel 14.
  • a pump was used to mix the lime and effluent thoroughly and pump it to the settling tank 16 and allowed to settle overnight (16- 20 hours).
  • Samples of the screened solids, primary waters (Prim- those which had been through the piggery once only), recycled (Pre primary waters which had been recycled through the piggery a number of times), and treated waters (Post- supernatant after settling) were taken and analysed for total phosphorus (TP) and total dissolved phospherus (DP). Total solid phosphorus was estimated by the difference.
  • Any unsettled floes of lime, which may contain phos ⁇ phorus and entrained in the liquid discharged from the settling tank 16, may be removed by utilising the embodiment of the process illustrated diagrammatically in Fig.3 of the drawings.
  • the liquid passing from the settling tank 16 containing the floes of lime is mixed with sand, primary flocculant and polyelectrolyte in the vessel 17, utilising the techniques disclosed in Australian Patent Specification No.22673/88.
  • the sand may be recycled.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

On décrit un procédé de réduction de la teneur en phosphore d'effluents provenant d'une porcherie, avec passage des effluents par un tamis pour éliminer les solides les plus importants. Ensuite, on recycle un liquide sensiblement claire sous forme de liquide de rinçage, l'addition de l'eau propre étant réduite au minimum. Périodiquement, généralement toutes les 24 heures, de la chaux solide est ajoutée au liquide recyclé ainsi que des matières fines pour former une boue. Après sédimentation, le liquide clair, qui a une teneur en phosphore réduite, peut être déchargé à l'égout ou utilisé pour l'irrigation.
EP19910903732 1990-01-29 1991-01-29 Treatment of piggery effluent Withdrawn EP0464193A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU8343/90 1990-01-29
AUPJ834390 1990-01-29
AU72333/91A AU7233391A (en) 1990-01-29 1991-01-29 Treatment of piggery effluent

Publications (2)

Publication Number Publication Date
EP0464193A1 true EP0464193A1 (fr) 1992-01-08
EP0464193A4 EP0464193A4 (en) 1992-07-15

Family

ID=25637008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910903732 Withdrawn EP0464193A4 (en) 1990-01-29 1991-01-29 Treatment of piggery effluent

Country Status (3)

Country Link
EP (1) EP0464193A4 (fr)
AU (1) AU7233391A (fr)
WO (1) WO1991011393A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2687929B1 (fr) * 1992-02-28 1994-11-25 Bio Armor Procede d'epuration d'excrements animaliers et son dispositif.
GB9415303D0 (en) * 1994-07-29 1994-09-21 Mini Agriculture & Fisheries Farm waste disposal system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH433133A (de) * 1961-09-30 1967-03-31 Metallgesellschaft Ag Verfahren zur Entfernung von Phosphaten aus Abwässern
GB1081096A (en) * 1964-08-18 1967-08-31 Nikex Nehezipari Kulkere Water treatment
CH501561A (de) * 1968-08-22 1971-01-15 Ernst Dr Rohrer Verfahren zur Aufbereitung der durch tierische Exkremente verursachten Abgänge aus Tierställen, wie Jauche oder jaucheartige, jauchehaltige oder frische Stallabwässer

Also Published As

Publication number Publication date
WO1991011393A1 (fr) 1991-08-08
EP0464193A4 (en) 1992-07-15
AU7233391A (en) 1991-08-21

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