WO1993016958A1 - Sludge treatment or destruction of the cellular structure of microorganisms by ultra-sounds - Google Patents

Sludge treatment or destruction of the cellular structure of microorganisms by ultra-sounds Download PDF

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Publication number
WO1993016958A1
WO1993016958A1 PCT/EP1993/000439 EP9300439W WO9316958A1 WO 1993016958 A1 WO1993016958 A1 WO 1993016958A1 EP 9300439 W EP9300439 W EP 9300439W WO 9316958 A1 WO9316958 A1 WO 9316958A1
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WO
WIPO (PCT)
Prior art keywords
sludge
sewage treatment
ultrasound
treatment plants
biological
Prior art date
Application number
PCT/EP1993/000439
Other languages
German (de)
French (fr)
Inventor
Gerhard Osswald
Toni Gradl
Original Assignee
Dr. Blasy - Dr. Busse Gmbh
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 Dr. Blasy - Dr. Busse Gmbh filed Critical Dr. Blasy - Dr. Busse Gmbh
Publication of WO1993016958A1 publication Critical patent/WO1993016958A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1284—Mixing devices
    • 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
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • 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
    • C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/06—Lysis of microorganisms
    • 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
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to a method for the destruction of cellular structures of suspensions of microorganisms, in particular sludges from biological sewage treatment plants, by means of ultrasound.
  • sludge As the use of the resulting sludge as fertilizer is becoming increasingly difficult, only landfill or incineration remains. Since both are associated with high costs, it is useful to use the sludge quantities, both by volume and by dry matter. to reduce the punching quantity. The resulting sludge is relatively difficult to drain. Dewatering is only possible with the addition of (expensive) conditioning agents. The sludge still contains a lot of organic matter, especially inside the cells of the microorganisms. These organic cellulose substances are difficult to attack biologically.
  • both primary, excess and digested sludge in the cell structure are destroyed in such a way that largely only the empty cell shells remain as settable substances, while the majority passes into real or coloidal solutions .
  • the residual sludges can be dewatered more easily and better. A lower use of conditioning agents is necessary for dewatering.
  • the substances that have gone into real or colloidal solution can be subjected again to microbiological degradation.
  • this can be done in the aerobic biological part of a sewage treatment plant (activated sludge, drip-body process), but preferably there it serves as a proton donor for denitrification.
  • activate sludge, drip-body process a sewage treatment plant
  • it serves as a proton donor for denitrification.
  • Another possibility is to digest the genuinely or colloidally dissolved organic substances together with the resulting sludges and thus to use them to produce biogas that can be used to generate energy.
  • the sludge passes a gap between the ultrasound transmitter and a wall which reflects the ultrasound, the gap having a defined width.
  • the slit width is preferably 1/4 to 1 wavelength. Sound frequencies between 10 and 50 kHz are particularly preferably used.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Microbiology (AREA)
  • Zoology (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Biotechnology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Wood Science & Technology (AREA)
  • Genetics & Genomics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Biomedical Technology (AREA)
  • Virology (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Mycology (AREA)
  • Treatment Of Sludge (AREA)
  • Physical Water Treatments (AREA)

Abstract

A process is disclosed for destroying the cellular structure of microorganisms by exposing suspensions of microorganisms to ultra-sonic radiation. These suspensions of microorganisms are in particular sludges from biological sewage clarification plants. A volume and mass reduction of the clarification sludges to be disposed of is achieved thanks to this ultra-sonic treatment.

Description

Beschreibung description
SCHLAMMBEHANDLUNG BZW. ZERSTÖRUNG ZELLULARER STRUKTUREN VON MIKROORGANISMEN DURCH ULTRASCHALL.SLUDGE TREATMENT OR DESTRUCTION OF CELLULAR STRUCTURES OF MICROORGANISMS BY ULTRASOUND.
Die Erfindung bezieht sich auf ein Verfahren zur Zer¬ störung zellulärer Strukturen von Suspensionen von Mi¬ kroorganismen insbesondere von Schlämmen aus biologi¬ schen Kläranlagen durch Ultraschall.The invention relates to a method for the destruction of cellular structures of suspensions of microorganisms, in particular sludges from biological sewage treatment plants, by means of ultrasound.
Es ist bekannt, daß sich zellulären Strukturen von Mi¬ kroorganismen mit Hilfe von Ultraschall zerstören las¬ sen.It is known that cellular structures of microorganisms can be destroyed using ultrasound.
In biologischen Kläranlagen entstehen durch Absetzvor¬ gänge Primärschlämme und durch Verstoffwechselung .bio¬ logisch abbaubarer Stoffe durch Bakterien im Bele- bungs- oder Tropfkörperverfahren Überschußschlämme (Bakteriensuspension) , die häufig einer Faulung zur Erzeugung von Biogas (in der Hauptsache Methan) unter¬ zogen werden. Dabei verbleibt Faulschlamm.In biological wastewater treatment plants, primary sludges are formed by settling processes and by metabolism of .bio¬ logically degradable substances by bacteria in the living or trickling filter process, excess sludges (bacterial suspension), which are often subjected to digestion to produce biogas (mainly methane) . This leaves digested sludge.
Da die Verwendung der anfallenden Schlämme als Dünger zunehmend erschwert wird, verbleibt nur noch entweder die Deponierung oder die Verbrennung. Da beides mit hohen Kosten verbunden ist, ist es von Nutzen die Schlammengen, sowohl nach Volumen wie nach Trockensub- stanzmenge zu reduzieren. Die anfallenden Schlämme lassen sich relativ schlecht entwässern. Die Entwässe¬ rung ist nur unter Zugabe von (teuren) Konditionie- rungsmitteln möglich. Die Schlämme enthalten noch viel an organischer Substanz vor allem im Inneren der Zellen der Mikroorganismen. Diese organischen Zeilin¬ haltsstoffe sind biologisch schwer angreifbar.As the use of the resulting sludge as fertilizer is becoming increasingly difficult, only landfill or incineration remains. Since both are associated with high costs, it is useful to use the sludge quantities, both by volume and by dry matter. to reduce the punching quantity. The resulting sludge is relatively difficult to drain. Dewatering is only possible with the addition of (expensive) conditioning agents. The sludge still contains a lot of organic matter, especially inside the cells of the microorganisms. These organic cellulose substances are difficult to attack biologically.
Durch die Behandlung der Schlämme mit Ultraschall wer¬ den sowohl Primär-, Überschuß- als auch Faulschlamm in der Zellstruktur so zerstört, daß weitgehend nur noch die leeren Zellhüllen als absetzbare Stoffe übrig bleiben, während der größte Teil in echte oder kol¬ loidale Lösungen übergeht. Im Gegensatz zu den nicht mit Ultraschall behandelten Schlämmen lassen sich die Restschlämme leichter und besser entwässern. Zur Ent¬ wässerung ist ein geringerer Einsatz von Konditionie- rungsmitteln notwendig.By treating the sludges with ultrasound, both primary, excess and digested sludge in the cell structure are destroyed in such a way that largely only the empty cell shells remain as settable substances, while the majority passes into real or coloidal solutions . In contrast to the sludges not treated with ultrasound, the residual sludges can be dewatered more easily and better. A lower use of conditioning agents is necessary for dewatering.
Die in echte oder kolloidale Lösung gegangenen Stoffe können erneut einem mikrobiologischen Abbau unterwor¬ fen werden. Dies kann zum einen im aeroben biologi¬ schen Teil einer Kläranlage geschehen (Belebtschlamm-, Tropfköperverfahren) , vorzugsweise dort aber als Pro¬ tonendonator für die Denitrifikation dienen. Dadurch wird das oft ungünstige Verhältnis zwischen leicht ab¬ baubaren Verbindungen und dem Nitratgehalt des nitri- fizierten Abwassers verbessert. Eine weitere Möglich¬ keit besteht darin, die echt oder kolloidal gelösten organischen Stoffe gemeinsam mit den anfallenden Schlämmen auszufaulen und so zur Erzeugung von Biogas heranzuziehen, das zur Energieerzeugung genutzt werden kann. Bei der Durchführung des Verfahrens ist es von beson¬ derem Vorteil, wenn der Schlamm einen Spalt zwischen dem Ultraschallgeber und einer Wand passiert, welche den Ultraschall reflektiert, wobei der Spalt eine definierte Breite hat. Die Spaltbreite beträgt vor¬ zugsweise 1/4 bis 1 Wellenlänge. Besonders bevorzugt werden Schallfrequenzen zwischen 10 und 50 kHz angewandt. The substances that have gone into real or colloidal solution can be subjected again to microbiological degradation. On the one hand, this can be done in the aerobic biological part of a sewage treatment plant (activated sludge, drip-body process), but preferably there it serves as a proton donor for denitrification. As a result, the often unfavorable relationship between easily degradable compounds and the nitrate content of the nitrified waste water is improved. Another possibility is to digest the genuinely or colloidally dissolved organic substances together with the resulting sludges and thus to use them to produce biogas that can be used to generate energy. When carrying out the method, it is of particular advantage if the sludge passes a gap between the ultrasound transmitter and a wall which reflects the ultrasound, the gap having a defined width. The slit width is preferably 1/4 to 1 wavelength. Sound frequencies between 10 and 50 kHz are particularly preferably used.

Claims

Patentansprüche Claims
1. Verfahren zur Zerstörung der zellulären Struktur von Suspensionen von Mikroorganismen, in Schlämmen aus biologischen Kläranlagen dadurch gekennzeichnet, daß diese Zerstö¬ rung durch Einwirkung von Ultraschall auf die Suspension geschieht.1. A method for destroying the cellular structure of suspensions of microorganisms in sludges from biological sewage treatment plants, characterized in that this destruction takes place by the action of ultrasound on the suspension.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Behandlung mit dem Z'el geschieht, Prozesse der Schlamm- und Abwasserbehandlung in Kläranlagen zu verbeε- sern.2. The method according to claim 1, characterized in that the treatment with the Z'el happens to improve processes of sludge and wastewater treatment in sewage treatment plants.
3. Verfahren nach den Ansprüchen 1 - 2, dadurch gekennzeichnet, daß die Behandlung mit dem Ziel geschieht, die im Zellinneren vorhandenen Stoffe in echte oder kolloidale Lösun¬ gen zu bringen, um so die anfallenden Schlammmengen zu verringern.3. The method according to claims 1-2, characterized in that the treatment is carried out with the aim of bringing the substances present in the cell interior into real or colloidal solutions so as to reduce the amounts of sludge that occur.
4. Verfahren nach den Ansprüchen 1 - 3, dadurch gekennzeichnet, daß Ultraschall εuf Überschußschlamm aus biologischen Kläranlagen einwirkt.4. Process according to claims 1-3, characterized in that ultrasound acts on excess sludge from biological sewage treatment plants.
5. Verfahren nach den Ansprüchen 1 - 3, dadurch gekennzeichnet, daß Ultraschall auf Primärschlamm aus biologischen Kläranlagen einwirkt5. The method according to claims 1-3, characterized in that ultrasound acts on primary sludge from biological treatment plants
6. Verfahren nach den Ansprüchen 1 - 3, dadurch gekennzeichnet, daß Ultraschall auf Faul¬ schlamm aus biologischen Kläranlagen einwirkt.6. The method according to claims 1-3, characterized in that ultrasound acts on sludge from biological sewage treatment plants.
7. Verfahren aus den Ansprüchen 1 - 3, dadurch gekennzeichnet, daß Ultrascnall auf ein vollständiges oder teϊiweises Gemisch aus Überschußschlamm, Primärschlamm und/oder Faulschlamm aus biologischen Kläranlagen einwirkt.7. Process from claims 1-3, characterized in that Ultrascnall acts on a complete or partial mixture of excess sludge, primary sludge and / or digested sludge from biological sewage treatment plants.
8. Verfahren nach den Ansprüchen 1 - 3 sowie einem der Ansprüche nach 3 - 6, dadurch gekennzeichnet, daß durch die Zerstörung der zellulären Struktur Zellinhaitsstoffe in echte oder kolloidale Lösung gehen und so innerhalb einer biologischen Kläranlage einem weiteren biologischen Ab- oder Umbau unterworfen werden können.8. The method according to claims 1-3 and one of the claims according to 3-6, characterized in that by destroying the cellular structure cell contents go into real or colloidal solution and are thus subjected to further biological degradation or conversion within a biological sewage treatment plant can.
9. Verfahren nach den Ansprüchen 1 - 8, dadurch gekennzeichnet, daß die freigesetzten Zellinhaltstoffe einer anaeroben Fermentation (Faulung) unterworfen werden, so daß energetisch nutzbares Biogas (in der Hauptsache Methan) freigesetzt werden kann. 9. The method according to claims 1-8, characterized in that the released cell contents are subjected to an anaerobic fermentation (digestion), so that energetically usable biogas (mainly methane) can be released.
10. Verfahren nach den Ansprüchen 1 - 8, dadurch gekennzeichnet, daß die freigesetzten Zellinhaltstoffe als Protonendonatoren innerhalb einer biologischen Kläranlage im Denitri¬ fikationsbecken oder Denitrifikationsteil zugesetzt werden.10. The method according to claims 1-8, characterized in that the released cell contents are added as proton donors within a biological sewage treatment plant in the Denitri¬ fication basin or denitrification part.
11. Anspruch nach 1 - 8, dadurch gekennzeichnet, daß sich die verbleibenden absetzbaren Stoffe (Restschlamm) leichter und besser eindicken und entwässern lassen als die ur¬ sprünglichen Schlämme, sowie dadurch, daß sich der Einsatz von Konditionierungsmittelr. zur Entwässerung verringert.11. Claim according to 1-8, characterized in that the remaining settable substances (residual sludge) thicken and drain more easily and better than the original sludges, and in that the use of conditioning agents. reduced for drainage.
12. Anspruch nach 1 - 11 , dadurch gekennzeichnet, daß der Schlamm einen Spalt zwischer. dem Ultraschallgeber und einer, den Ultraschall reflektierenden, Wand passiert, die eine definierte Breite hat.12. Claim according to 1-11, characterized in that the sludge a gap between. passes the ultrasound generator and a wall, which reflects the ultrasound, and has a defined width.
13. Anspruch nach 12, dadurch gekennzeichnet, daß die Spaltbreite zwischen einem und einer Viertel Wellenlänge beträgt.13. Claim according to 12, characterized in that the gap width is between one and a quarter wavelength.
14. Anspruch nach 1 - 13, dadurch gekennzeichnet, daß Schallfrequenzen zwischen 10 und 50 kHz angewandt werden. 14. Claim according to 1-13, characterized in that sound frequencies between 10 and 50 kHz are applied.
PCT/EP1993/000439 1992-02-25 1993-02-25 Sludge treatment or destruction of the cellular structure of microorganisms by ultra-sounds WO1993016958A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4205739.6 1992-02-25
DE4205739A DE4205739A1 (en) 1992-02-25 1992-02-25 METHOD FOR DESTRUCTING CELLULAR STRUCTURES OF SUSPENSIONS OF MICROORGANISMS BY ULTRASOUND, ESPECIALLY SLUDES FROM BIOLOGICAL WASTEWATER PLANTS

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Cited By (2)

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DE4407564A1 (en) * 1994-03-08 1995-09-14 Toni Dr Gradl Oxidn. of organic substances in sewage plant sludge
GB2351284A (en) * 1998-12-09 2000-12-27 Aw Creative Technologies Ltd Biological removal of phosphorus from waste water

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WO1996023736A1 (en) * 1995-01-30 1996-08-08 Robert Vit Device and process for thickening and conveying waste water sludges
DE19517381C1 (en) * 1995-05-11 1996-11-07 Tesser Kurt Dipl Ing Fh Commercial scale ultrasonic reactor for sludge treatment
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US7387719B2 (en) 2001-04-24 2008-06-17 Scimist, Inc. Mediated electrochemical oxidation of biological waste materials
US7488409B1 (en) 2001-10-05 2009-02-10 Scimist, Inc. Mediated electrochemical oxidation of animal waste materials
US7517445B2 (en) 2001-10-09 2009-04-14 Scimist, Inc. Mediated electrochemical oxidation of food waste materials
WO2003095116A2 (en) 2001-10-22 2003-11-20 The C & M Group, Llc Mediated electrochemical oxidation of organic waste materials
US7691251B2 (en) 2002-01-24 2010-04-06 Scimist, Inc. Mediated electrochemical oxidation and destruction of sharps
US7479215B2 (en) 2002-01-24 2009-01-20 Scimist, Inc. Mediated electrochemical oxidation of halogenated hydrocarbon waste materials
AU2003217242A1 (en) 2002-01-24 2003-09-09 The C And M Group, Llc Mediated electrochemical oxidation used for sterilization/disinfection
WO2003091165A1 (en) 2002-04-26 2003-11-06 The C & M Group, Llc Mediated electrochemical oxidation process used as a hydrogen fuel generator
US7531708B2 (en) 2002-07-29 2009-05-12 Scimist, Inc. Mediated electrochemical oxidation for decontamination
WO2004024634A2 (en) 2002-09-10 2004-03-25 The C & M Group, Llc Mediated electrochemical oxidation of inorganic materials
US8414748B2 (en) 2003-06-10 2013-04-09 Scimist, Inc. Apparatus and process for mediated electrochemical oxidation of materials
DE102007000824A1 (en) 2007-10-05 2009-04-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method and device for improving the disintegration of thixotropic suspensions by means of ultrasound
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CN114772883B (en) * 2022-05-16 2023-09-05 中国矿业大学 Treatment method of black and odorous water body substrate sludge and application of black and odorous water body substrate sludge in preparation of baking-free bricks

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DE4407564A1 (en) * 1994-03-08 1995-09-14 Toni Dr Gradl Oxidn. of organic substances in sewage plant sludge
GB2351284A (en) * 1998-12-09 2000-12-27 Aw Creative Technologies Ltd Biological removal of phosphorus from waste water
GB2351284B (en) * 1998-12-09 2001-08-15 Aw Creative Technologies Ltd Biological removal of phosphorus from waste water

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