WO1999011579A1 - Sludges conditioning process from sanitation sewage treatment - Google Patents

Sludges conditioning process from sanitation sewage treatment Download PDF

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Publication number
WO1999011579A1
WO1999011579A1 PCT/BR1998/000026 BR9800026W WO9911579A1 WO 1999011579 A1 WO1999011579 A1 WO 1999011579A1 BR 9800026 W BR9800026 W BR 9800026W WO 9911579 A1 WO9911579 A1 WO 9911579A1
Authority
WO
WIPO (PCT)
Prior art keywords
sewage treatment
sludges
sanitation
heavy metals
organic
Prior art date
Application number
PCT/BR1998/000026
Other languages
French (fr)
Inventor
Ruy Thales Baillot
Original Assignee
Alphageos Geologia Geotecnia E Comércio Ltda.
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 Alphageos Geologia Geotecnia E Comércio Ltda. filed Critical Alphageos Geologia Geotecnia E Comércio Ltda.
Priority to AU79003/98A priority Critical patent/AU7900398A/en
Publication of WO1999011579A1 publication Critical patent/WO1999011579A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • 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
    • C02F11/008—Sludge treatment by fixation or solidification
    • 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

Definitions

  • This invention refers to a process of physical conditioning and reduction of heavy metal contents contained in the product resulting from the sanitation sewage treatment at the Sewage Treatment Stations - ETE, and other industrial residues whose main characteristics are the high content of organic material and/or heavy metals, consisting of the addition of calcium and magnesium silicoaluminate.
  • the purpose of this invention is to correct the above mentioned inconveniences by providing an industrial process developed for correction of sludge resulting from the ETE sanitation sewage treatment and other industrial organic residues, by physically conditioning these materials, that is, rendering them workable (enabling their easy processing, disposal and compacting) and adapting the heavy metal contents to the levels present in the existent international law, giving ground for their meeting the rating of the materials that may be used as organic fertilizers and other industrial utilizations.
  • the "cake" resulting from the process of the sanitation sewage treatment (and other materials containing organic materials and/or heavy metals) is combined with suitable quantities of calcium and magnesium silicoaluminate, therefore with the great specific area of diatomite covered with montmorillonite, the mineral having great hydrophilous capacity that reduces the water, free in the radical way, rendering the material workable and allowing its handling, stacking and compacting.
  • the heavy metals If they exist, they will be absorbed by cationic exchange with cations from other elements, especially hydrogen.
  • the concentration of the conditioner (calcium and magnesium silicoaluminate) shall be established for each case, based on the quantity of heavy metals and degree of moisture (quantity of free water) present.

Abstract

Patent of Invention of a conditioning process of the sludges resulted from sanitation sewage treatment (Sewage Treatment Stations - ETE) and of the reduction of heavy metal contents, also applicable to other organic residues and to the springs degraded by organic material and heavy metals, which refers to a process of the physical conditioning and correction of heavy metal contents of the sludges produced by the sanitation sewage treatment process at the Sewage Treatment Stations - ETE and other eminently organic industrial residues with or without concentration of heavy metals, by adding the DIATOMITE SATURATED WITH MONTMORILLONITE (calcium and magnesium silicoaluminate).

Description

PATENT OF INVENTION
SPECIFICATION
SLUDGES CONDITIONING PROCESS FROM SANITATION SEWAGE TREATMENT
This invention refers to a process of physical conditioning and reduction of heavy metal contents contained in the product resulting from the sanitation sewage treatment at the Sewage Treatment Stations - ETE, and other industrial residues whose main characteristics are the high content of organic material and/or heavy metals, consisting of the addition of calcium and magnesium silicoaluminate.
Nowadays, the ''cake" resulting from the Sewage Treatment Stations (ETE) constitutes a great universal problem, as the very poor workability of the ""tiles" resulting from the filter-compressing definitely prevents their processing, disposal and compacting in specifically built for this purpose industrial residue storehouses. And adding the fact that - as a general rule - this sludge has heavy metals that exceed the content allowed by the law for their use as organic fertilizers and other industrial purposes, the sludge from ETEs constitutes a problem difficult to solve. The purpose of this invention is to correct the above mentioned inconveniences by providing an industrial process developed for correction of sludge resulting from the ETE sanitation sewage treatment and other industrial organic residues, by physically conditioning these materials, that is, rendering them workable (enabling their easy processing, disposal and compacting) and adapting the heavy metal contents to the levels present in the existent international law, giving ground for their meeting the rating of the materials that may be used as organic fertilizers and other industrial utilizations.
The invention shall be described on the basis of the attached figure representing the process flowchart.
The "cake" resulting from the process of the sanitation sewage treatment (and other materials containing organic materials and/or heavy metals) is combined with suitable quantities of calcium and magnesium silicoaluminate, therefore with the great specific area of diatomite covered with montmorillonite, the mineral having great hydrophilous capacity that reduces the water, free in the radical way, rendering the material workable and allowing its handling, stacking and compacting. Should the heavy metals exist, they will be absorbed by cationic exchange with cations from other elements, especially hydrogen. The concentration of the conditioner (calcium and magnesium silicoaluminate) shall be established for each case, based on the quantity of heavy metals and degree of moisture (quantity of free water) present.
A number of tests have been performed with the sludge derived from Barueri Sewage Treatment Station ("SABESP" [Basic Sanitation of the State of Sao Paulo]) and the results showed enormous advantage as compared to other attempts at conditioning, rendering easy transportation like any earthy material, storage and compacting.
In the events where heavy metals were present, they were "captured" and encapsulated in the process of cationic exchange, thus conditioning the material in different levels of the use of conditioning material based on the organic material content and heavy metals contained. So, different variations are, obviously, possible as well as the modification of this invention in the light of the obtained knowledge.
Therefore, it is necessary to understand that, to the extent of the attached claim, the invention may be used in a different from the specifically described way.

Claims

CLAIM
1 "CONDITIONING PROCESS OF THE SLUDGES RESULTED FROM
SANITATION SEWAGE TREATMENT (SEWAGE TREATMENT STATIONS - ETE) AND OF THE REDUCTION OF HEAVY METAL CONTENTS, ALSO APPLICABLE TO OTHER ORGANIC RESIDUES AND TO THE SPRINGS DEGRADED BY ORGANIC MATERIAL AND HEAVY METALS", characterized by understanding of the stages of: initial mixture of the DIATOMITE conditioner DULY SATURATED WITH MONTMORILLONITE (calcium and magnesium silicoaluminate), intermediate revolving, transportation of the conditioned material, disposal into the regulation fills, sale for the use in agriculture and industry or compacting in fills with defined and stable slopes.
PCT/BR1998/000026 1997-09-03 1998-04-16 Sludges conditioning process from sanitation sewage treatment WO1999011579A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79003/98A AU7900398A (en) 1997-09-03 1998-04-16 Sludges conditioning process from sanitation sewage treatment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9702826A BR9702826A (en) 1997-09-03 1997-09-03 Process of conditioning of sludge resulting from the treatment of sanitary sewage (sewage treatment stations-et) and reduction of the contents of heavy metals contained also applicable to other organic industrial residues and to springs degraded by organic material and heavy metals
BRPI9702826-6 1997-09-03

Publications (1)

Publication Number Publication Date
WO1999011579A1 true WO1999011579A1 (en) 1999-03-11

Family

ID=4067321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR1998/000026 WO1999011579A1 (en) 1997-09-03 1998-04-16 Sludges conditioning process from sanitation sewage treatment

Country Status (3)

Country Link
AU (1) AU7900398A (en)
BR (1) BR9702826A (en)
WO (1) WO1999011579A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116705A (en) * 1973-06-01 1978-09-26 Stablex Ag Detoxification
JPS5610398A (en) * 1979-07-05 1981-02-02 Akira Nishida High speed dehydrating agent and treating method for excretion waste which use said agent
JPS5845798A (en) * 1981-09-14 1983-03-17 Hisashi Nakabayashi Treatment of organic or inorganic sludge
FR2658807A1 (en) * 1990-02-27 1991-08-30 Augarde Jacques Treatment of water, sludge and waste using recycled mineral reactants
US5387740A (en) * 1991-10-23 1995-02-07 En-Tech Research Institute Inc. Immobilization agent for industrial waste
EP0747064A2 (en) * 1995-06-09 1996-12-11 Progetto Emme S.r.l. Compound for treating animal excrement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116705A (en) * 1973-06-01 1978-09-26 Stablex Ag Detoxification
JPS5610398A (en) * 1979-07-05 1981-02-02 Akira Nishida High speed dehydrating agent and treating method for excretion waste which use said agent
JPS5845798A (en) * 1981-09-14 1983-03-17 Hisashi Nakabayashi Treatment of organic or inorganic sludge
FR2658807A1 (en) * 1990-02-27 1991-08-30 Augarde Jacques Treatment of water, sludge and waste using recycled mineral reactants
US5387740A (en) * 1991-10-23 1995-02-07 En-Tech Research Institute Inc. Immobilization agent for industrial waste
EP0747064A2 (en) * 1995-06-09 1996-12-11 Progetto Emme S.r.l. Compound for treating animal excrement

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8113, Derwent World Patents Index; Class A97, AN 81-22144D, XP002078812 *
DATABASE WPI Section Ch Week 8317, Derwent World Patents Index; Class D15, AN 83-40287K, XP002078811 *

Also Published As

Publication number Publication date
BR9702826A (en) 1998-12-29
AU7900398A (en) 1999-03-22

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