WO2012032142A1 - Procédé et dispositif de désintégration électrocinétique des constituants cellulaires de suspensions aqueuses ne nécessitant pas de préfragmentation - Google Patents

Procédé et dispositif de désintégration électrocinétique des constituants cellulaires de suspensions aqueuses ne nécessitant pas de préfragmentation Download PDF

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Publication number
WO2012032142A1
WO2012032142A1 PCT/EP2011/065613 EP2011065613W WO2012032142A1 WO 2012032142 A1 WO2012032142 A1 WO 2012032142A1 EP 2011065613 W EP2011065613 W EP 2011065613W WO 2012032142 A1 WO2012032142 A1 WO 2012032142A1
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WO
WIPO (PCT)
Prior art keywords
electrodes
disintegration
voltage
tube
high voltage
Prior art date
Application number
PCT/EP2011/065613
Other languages
German (de)
English (en)
Inventor
Peter Sperber
Manfred Eder
Thomas Donaubauer
Stefan Donaubauer
Andreas Zacherl
John Mihopulos
Original Assignee
Süd-Chemie AG
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
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Application filed by Süd-Chemie AG filed Critical Süd-Chemie AG
Publication of WO2012032142A1 publication Critical patent/WO2012032142A1/fr

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    • 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
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/487—Treatment of water, waste water, or sewage with magnetic or electric fields using high frequency electromagnetic fields, e.g. pulsed electromagnetic fields
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
    • A23N1/00—Machines or apparatus for extracting juice
    • A23N1/006—Machines or apparatus for extracting juice by electroplasmolysis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis

Definitions

  • the invention relates to a method and a device for electrokinetic disintegration of the cell constituents of aqueous suspensions.
  • the apparatus includes a flow tube having a tube wall enclosing a longitudinal passageway and at least one pair of electrodes and high voltage generating means to which the electrodes are connected to generate an electric field therebetween.
  • dissolved and undissolved compounds serve as the substrate of various microorganisms. These are capable of producing not only biomass from the suspension via a multistep biochemical conversion (hydrolysis - acidogenesis - aceticogenesis - methanogenesis) but also flammable gases, mainly methane and hydrogen, as part of the energy metabolism.
  • digests are often at temperatures above ambient temperature, usually between 35 ° C and 40 ° C (mesophile) or between 50 ° C and 55 ° C (thermophile).
  • temperature, acid capacity, pH and mixing has a decisive influence on the quality of the process, ie the gas yield during the reaction and thus the eventual energy recovery from the starting material. In all systems of this type, therefore, large amounts of energy are used for the input of heat and mixing energy.
  • the viscosity of the suspension can be reduced and thus the pumpability can be increased, whereby the energy expenditure for pumping and circulating decreases.
  • the overall efficiency of the system is thereby increased.
  • Another application is the treatment of aqueous suspensions in the food industry, such as those incurred in the fruit juice industry. Here can be increased by the treatment of product output.
  • paper sludge can be uniformly applied to the paper machine by homogenization, thereby improving paper quality.
  • all aqueous media are suitable for treatment whose ingredients consist at least partially of cells or cell aggregates.
  • a device for electrokinetic disintegration of the cell components of aqueous suspensions of plant material of the type mentioned in which the electrodes are annular integrated into the pipe wall and part of the inside of the pipe wall, so that they are pumped with the suspension in Standing in contact.
  • the electrodes are spaced apart in the flow direction of the suspension, and between them is a likewise annular isolation region.
  • the cross section of the flow tube may be oval or rectangular.
  • the voltage applied to the electrodes is 0.1 to 50 kV and has a pulse rate of 10 to 500 Hz.
  • the generated field strength is 0.2 to 10 kV / cm, with the flow tube having a diameter of 1 to 20 cm.
  • the conductivity of the treated suspension is 0.01 to 0.50 S / m, with a tomato suspension, an energy of 0.01 to 5.0 kJ / kg is introduced.
  • a similar device is also known from WO 2006/017738.
  • a device for the destruction of pathogenic microorganisms in liquids, including blood in which the cross section of the passage opening is between 2 and 40 mm 2 , the cross-sectional opening is rectangular and to opposing electrodes a voltage of up to 100 V is created.
  • the voltage has a frequency of 400 Hz to 1 MHz.
  • a current of up to 2 A In the treatment of human blood flows a current of up to 2 A.
  • Electrodes are connected to a DC voltage source.
  • the electrodes are immersed in the water to be treated.
  • a disintegration device in which extends axially and centrally in the flow tube, a rod-shaped electrode which is electrically insulated , A high voltage of more than 10 kV is applied to the rod-shaped electrode. It can be DC or AC in the kHz range.
  • the electric field has a radial structure.
  • Such a device is also known from DE 20 2010 000 025. In this design, it can lead to blockages and blockages in the pipe system. This can be avoided by pre-shredding. This pre-shredding (e.g., macerator) reduces the overall efficiency because of the need to use a lot of energy for crushing and also increases the maintenance effort due to the wear associated with comminution.
  • the flow tube must have a large length or the suspension must be passed several times through the disintegration device in order to achieve optimum disintegration for the use of the suspension, for example in a biogas plant.
  • the invention has for its object to increase the effectiveness of the disintegration.
  • this object is achieved in a device of the type described above in that the passage opening has two opposite and mutually parallel, planar inner surfaces and that the electrodes are arranged within the tube wall at a small distance from and parallel to the flat inner surfaces.
  • this object is achieved in that the electric field over the cross section of the passage opening is uniform.
  • the generated field strength over the cross section of the passage opening is substantially uniform.
  • the passage opening has a rectangular cross section with flat inner surfaces and the electrodes extend substantially over the full width of the rectangular cross section of the passage opening.
  • the uniformity of the electric field is further improved.
  • Disintegration devices with an axial, central rod electrode have hitherto been used in practice, in particular.
  • the field strength is very high and decreases radially outward.
  • this has the consequence that the suspension or the medium must be treated several times.
  • rod electrode holders are required at the end. These easily lead to blockages or blockages of the passage opening.
  • the fact that the electrodes are integrated into the pipe wall in the integration device according to the invention, the passage opening is free, so that the risk of clogging or blocking by an axial, central rod electrode or its support no longer exists.
  • the electrodes are useful metal strips which are integrated into the wall of the flow tube and are insulated by a plastic layer of about 1 mm thickness of the free cross-section of the passage opening and thus of the suspension to be treated. The disintegration therefore takes place without current flow and only through the electric field, so that the power consumption is extremely low, and e.g. less than 50 watts.
  • two or more electrode pairs of alternating polarity are arranged behind one another along the passage opening.
  • the disintegration effect is also enhanced.
  • the polarity of the electric field then changes along the flow tube.
  • the disintegration device is constructed in such a way that a metal outer tube is spaced around an inner tube of glass fiber reinforced plastic, wherein the number of electrode pairs rests on the outside of the inner tube.
  • the high voltage device is located in the space between inner tube and outer tube.
  • the high voltage device preferably consists of two power supplies, each having a controllable positive or negative high voltage of e.g. generate up to 150 kV. Between the electrodes is then the double voltage, ie up to 300 kV.
  • the high voltage device generates DC voltage.
  • AC voltage is also possible, the frequency being 1 Hz to 5 MHz, preferably 1 Hz to 5 kHz.
  • the remaining space between the inner tube and outer space is potted with plastic and may still be surrounded by a polypropylene tube, which acts as a protective screen.
  • the metal outer tube serves as a heat sink for the high voltage device and at the same time as grounding of the device.
  • the high-voltage device contains only a single power supply, one of the electrodes is at earth potential.
  • the flow tube of the disintegration device may be a tube element with a length of about 2 m, wherein the passage opening has a rectangular cross section of 7 by 12 cm.
  • Two pairs of electrodes lie on the wider side of the rectangular cross section and the electrodes accordingly have a width of about 12 cm. Their length can be about 55 cm.
  • a DN150 flange connection with reductions can be located on the rectangular cross-section of the passage opening.
  • the inventive method and apparatus for disintegration is for the treatment of suspensions such as excess sludge, primary sludge, circulating sludge, substrates from agriculture, waste from the food industry, etc. suitable.
  • suspensions such as excess sludge, primary sludge, circulating sludge, substrates from agriculture, waste from the food industry, etc. suitable.
  • the suspension is better flowable and thus easier to pump.
  • the tendency to foaming is reduced. Homogenization of the suspension can also be detected.
  • an increased biogas yield in the anaerobic stabilization compared to untreated sludge is achieved. In the end, this also increases the degree of digestion, which in turn has positive effects on drainability and the chargeable disposal of residual sludge.
  • Figure 1 in a spatial representation and in section, the device for disintegration of digested sludge.
  • Figure 2 shows in section a part of the disintegration device with two pairs of electrodes.
  • 3 shows the disintegration device in longitudinal section;
  • Fig. 4 the disintegration device rotated by 90 ° in longitudinal section;
  • Fig. 5 the disintegration device in section to 5-5 of Fig. 4 and
  • Fig. 6 shows a possible flow diagram of a plant in which the disintegration device is installed.
  • the disintegration device 10 has a flow tube, which is formed from a circular cylindrical outer tube 12 and an inner tube 14, and in the space between the outer tube 12 and the inner tube 14, a high voltage device 16 and two pairs of electrodes 18, 20, located on the outside of the inner tube 14 lie.
  • the inner tube 14 has over almost its entire length a passage opening 15 of rectangular cross-section, so that the passage opening is bounded by flat inner surfaces 24.
  • the aspect ratio of the rectangular cross section is about 1: 2.
  • the inner tube 14 has only one flange connection 22, to which a reduction 26 adjoins the rectangular cross-section.
  • the inner tube 14 is made of fiberglass-reinforced plastic.
  • the inner tube 14 has a wide outer surface 28 and a narrow outer surface 30.
  • the electrodes 32 of the first and second pairs of electrodes 18, 20 are each metal strips, which are placed on the wide outer side 28 of the inner tube 14.
  • the electrodes 32 of each electrode pair 18, 20 are each arranged opposite one another, wherein a distance of a few centimeters exists between the first electrode pair 18 and the second electrode pair 20.
  • the high-voltage device 16 is further arranged, which consists of two power supplies 34, 36.
  • Each electrode 32 is connected to a power supply 34, 36.
  • the power supplies 34, 36 are each potted in a block and can generate a voltage of up to + or - 150 kV DC or AC voltage with 1 Hz to 5 MHz. In order to avoid punctures, it must be ensured that no air pockets remain in the power packs 34, 36 when casting.
  • the voltage applied between the electrodes can then be up to 300 kV.
  • the output voltage is linearly dependent on the input voltage within a control range of 30 kV to 150 kV. For the generation of DC voltage cascade circuits and for the generation of AC voltage transformers are used.
  • the electrodes 32 are connected to the power supply units 34, 36 such that the electrode pairs 18, 20 have opposite polarity. Since the electrodes 32 are isolated from the suspension to be treated by the material of the inner tube, no conduction current flows but only displacement current. Due to the galvanic separation of the two electrodes no electron flow through the suspension or lines takes place. It comes so outside the high voltage device itself to no power consumption of the system. The power consumption of the power supplies is therefore only about 50 watts.
  • the space between the inner tube 14 and the outer tube 12 is filled with a potting compound 38, wherein the potting compound 38 is still surrounded by a polypropylene tube 40, which is located directly within the metal outer tube 12 and together with the potting compound as a protective screen before high voltage serves.
  • FIG. 2 shows in detail the region of the disintegration device 10 in which the two pairs of electrodes 18, 20 are located.
  • the electrodes 32 are located within the potting compound 38 and lie directly on the outside of the inner tube 14.
  • the potting compound 38 surrounds the inner tube 14 and is enclosed in the polypropylene tube 40.
  • the polypropylene tube 40 is in turn surrounded by the metal outer tube 12.
  • the two electrode pairs 18 and 20 are oppositely poled, so that when the digested sludge 42 flows through, the charges on the cell membrane of the cell components are forced to rearrange. This charge change leads to a high osmotic pressure, which dissolves the cell composite and destroys the cell membrane.
  • FIGS. 3 to 5 show the structure of the disintegration device 10 true to scale, wherein in particular it can be seen in FIG. 3 that the electrodes 32 extend over the entire width of the longer dimension of the rectangular cross section of the inner tube 14.
  • the suspension to be treated which is digested sludge 42
  • the container 44 may be a storage container in which the digested sludge is buffered, in which case it is then sent through the disintegration device 10 several times a day.
  • the container 44 may also be a fermenter or digester, the digested sludge then being sent through the disintegration device 10 only once a day, due to the size of the container 44.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un dispositif de désintégration électrocinétique des constituants cellulaires de suspensions aqueuses, comprenant un tube d'écoulement (12, 14) qui présente une paroi tubulaire entourant un orifice de passage longitudinal (15), au moins une paire (18) d'électrodes (32), et un système (16) servant à générer une haute tension comprise entre 30 et 300 kV, auquel les électrodes (32) sont reliées de manière à produire entre elles un champ électrique. L'orifice de passage (15) présente deux surfaces internes planes (24) opposées et parallèles, et les électrodes (32) sont disposées à l'intérieur de la paroi tubulaire à une faible distance des surfaces internes planes et parallèlement à celles-ci.
PCT/EP2011/065613 2010-09-10 2011-09-09 Procédé et dispositif de désintégration électrocinétique des constituants cellulaires de suspensions aqueuses ne nécessitant pas de préfragmentation WO2012032142A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202010012478.6 2010-09-10
DE202010012478U DE202010012478U1 (de) 2010-09-10 2010-09-10 Vorrichtung zur elektrokinetischen Desintegration der Zellbestandteile wässriger Suspensionen ohne verfahrensbedingte Vorzerkleinerung

Publications (1)

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WO2012032142A1 true WO2012032142A1 (fr) 2012-03-15

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PCT/EP2011/065613 WO2012032142A1 (fr) 2010-09-10 2011-09-09 Procédé et dispositif de désintégration électrocinétique des constituants cellulaires de suspensions aqueuses ne nécessitant pas de préfragmentation

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DE (1) DE202010012478U1 (fr)
WO (1) WO2012032142A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3141595B1 (fr) * 2015-09-11 2019-03-20 pro agri gmbh Procede et dispositif destines a la production de biogaz
DE202015104848U1 (de) * 2015-09-11 2016-12-14 pro agri gmbh Vorrichtung zum Erzeugen von Biogas

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527425A1 (fr) * 1982-05-26 1983-12-02 Inst Prik Fiz Akade Installation de plasmolyse electrique pour le traitement des produits vegetaux
DE19752371A1 (de) * 1996-11-27 1998-06-10 Kern Martin Verfahren zur Behandlung und Konditionierung von biologischen Schlämmen durch Stoßspannungsentladung
WO2000013715A1 (fr) 1998-09-04 2000-03-16 Eric Ponce Dispositif et procede de destruction de micro-organismes notammen t par voie extracorporelle
JP2001058179A (ja) 1999-08-24 2001-03-06 Kobe Steel Ltd 水処理法及び水処理装置
WO2002004356A1 (fr) 2000-07-10 2002-01-17 D-H20 L.L.C. Procede de deshumidification de boues activees par dechets, au moyen d'une tension electrique elevee
JP2002028685A (ja) 2000-07-17 2002-01-29 Kobe Steel Ltd 有機性廃液の好気性処理方法及びその装置
DE10144479A1 (de) 2001-09-10 2003-03-27 Karlsruhe Forschzent Elektroporationsreaktor zur kontinuierlichen Prozessierung von stückigen Produkten
US20040112840A1 (en) * 2002-12-17 2004-06-17 Jamel Bourazak Fluid treatment system apparatus and method
US20040168977A1 (en) * 1995-11-02 2004-09-02 Jeffrey Held Method for treating waste-activated sludge using elecroporation
WO2006017738A1 (fr) 2004-08-06 2006-02-16 Opencel Llc Procede et appareil de conversion de matieres biologiques en ressources energetiques
WO2006121397A1 (fr) 2005-05-12 2006-11-16 Kraft Foods R & D Inc. Traitement de legume-racine
EP1741675A1 (fr) 2005-07-05 2007-01-10 Adept Water Technologies A/S Procédé et dispositif pour le traitement d'eaux usées
US20090229981A1 (en) * 2008-03-12 2009-09-17 Desanto Mark R Liquid disinfectant apparatus
DE102008024065A1 (de) * 2008-05-17 2009-11-19 Forschungszentrum Karlsruhe Gmbh Einrichtung und Verfahren zur druckgesteuerten und druckgeregelten, elektroporativen Behandlung biologisch pflanzlichem Prozessguts
DE202010000025U1 (de) 2010-01-12 2010-05-06 Innovum Gmbh Innovative Umwelttechnik Desintegrations-Rohrelement und -System

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527425A1 (fr) * 1982-05-26 1983-12-02 Inst Prik Fiz Akade Installation de plasmolyse electrique pour le traitement des produits vegetaux
US20040168977A1 (en) * 1995-11-02 2004-09-02 Jeffrey Held Method for treating waste-activated sludge using elecroporation
DE19752371A1 (de) * 1996-11-27 1998-06-10 Kern Martin Verfahren zur Behandlung und Konditionierung von biologischen Schlämmen durch Stoßspannungsentladung
WO2000013715A1 (fr) 1998-09-04 2000-03-16 Eric Ponce Dispositif et procede de destruction de micro-organismes notammen t par voie extracorporelle
JP2001058179A (ja) 1999-08-24 2001-03-06 Kobe Steel Ltd 水処理法及び水処理装置
WO2002004356A1 (fr) 2000-07-10 2002-01-17 D-H20 L.L.C. Procede de deshumidification de boues activees par dechets, au moyen d'une tension electrique elevee
JP2002028685A (ja) 2000-07-17 2002-01-29 Kobe Steel Ltd 有機性廃液の好気性処理方法及びその装置
DE10144479A1 (de) 2001-09-10 2003-03-27 Karlsruhe Forschzent Elektroporationsreaktor zur kontinuierlichen Prozessierung von stückigen Produkten
WO2006096151A1 (fr) 2002-10-15 2006-09-14 D-H20, L.L.C. Procede de traitement, par electroporation, de la boue generee par des dechets
US20040112840A1 (en) * 2002-12-17 2004-06-17 Jamel Bourazak Fluid treatment system apparatus and method
WO2006017738A1 (fr) 2004-08-06 2006-02-16 Opencel Llc Procede et appareil de conversion de matieres biologiques en ressources energetiques
WO2006121397A1 (fr) 2005-05-12 2006-11-16 Kraft Foods R & D Inc. Traitement de legume-racine
EP1741675A1 (fr) 2005-07-05 2007-01-10 Adept Water Technologies A/S Procédé et dispositif pour le traitement d'eaux usées
US20090229981A1 (en) * 2008-03-12 2009-09-17 Desanto Mark R Liquid disinfectant apparatus
DE102008024065A1 (de) * 2008-05-17 2009-11-19 Forschungszentrum Karlsruhe Gmbh Einrichtung und Verfahren zur druckgesteuerten und druckgeregelten, elektroporativen Behandlung biologisch pflanzlichem Prozessguts
DE202010000025U1 (de) 2010-01-12 2010-05-06 Innovum Gmbh Innovative Umwelttechnik Desintegrations-Rohrelement und -System

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