WO2006027062A1 - Procede pour desagreger des boues - Google Patents

Procede pour desagreger des boues Download PDF

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Publication number
WO2006027062A1
WO2006027062A1 PCT/EP2005/008474 EP2005008474W WO2006027062A1 WO 2006027062 A1 WO2006027062 A1 WO 2006027062A1 EP 2005008474 W EP2005008474 W EP 2005008474W WO 2006027062 A1 WO2006027062 A1 WO 2006027062A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
sludge
pressure
pressure reaction
biomass
Prior art date
Application number
PCT/EP2005/008474
Other languages
German (de)
English (en)
Inventor
Reimut Blaschek
Original Assignee
Linde Aktiengesellschaft
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 Linde Aktiengesellschaft filed Critical Linde Aktiengesellschaft
Priority to EP05773333A priority Critical patent/EP1784364A1/fr
Publication of WO2006027062A1 publication Critical patent/WO2006027062A1/fr

Links

Classifications

    • 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
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/06—Pressure conditions
    • C02F2301/066—Overpressure, high pressure
    • 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
    • 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
    • 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 process for the treatment of biomass-containing sludge obtained in a biological treatment of biodegradable substances containing media.
  • biomass-containing sludge e.g. Sewage sludge or sludge
  • various methods have already been proposed for the so-called disintegration of sludges, in which e.g. the sewage sludge or sludge is crushed by the action of external physical, chemical or biological forces.
  • the action of the forces leads to sludge digestion with the aim of better drainability.
  • the degree of comminution of the sludge depends, inter alia, on the method used, the energy used and the properties of the sludge. At low energy inputs, only a flocculation destruction takes place predominantly, with high energy inputs a flocculation and a disruption of the microorganisms.
  • Concrete applications are the improvement of anaerobic stabilization, the provision of internal hydrogen sources for denitrification and the improved settleability of sludges, in particular swelling sludge.
  • Sewage sludge disintegration is a step in the process that has so far been used only sporadically on municipal wastewater treatment plants.
  • the sludges are usually exposed to temperatures of over 100 degrees Celsius, whereby the cell walls of the microorganisms are destroyed.
  • Chemical processes e.g. Wet oxidation, ozone treatment, hydrogen peroxide treatment, alkaline and acid hydrolysis, have the aim of causing a chemical disruption of the cells.
  • isolated biochemical methods are used in which, for example, by enzyme formation, a hydrolysis is carried out.
  • the present invention is therefore based on the object, a method of the type mentioned above in such a way that an economic disintegration of the sludge is er ⁇ sufficient to largely renounce auf ⁇ man agile mechanical devices.
  • the sludge is introduced into a high-pressure reaction vessel
  • a gas or gas mixture is introduced into the high-pressure reaction vessel and a pressure above atmospheric pressure is adjusted so that the gas or gas mixture diffuses into the biomass
  • the high-pressure reaction vessel is expanded so that a gas overpressure arises in the biomass, which leads to a digestion of the biomass.
  • the invention is based on the consideration that destruction of the cell membrane takes place by sudden relaxation of the highly gas-supersaturated cell contents. For this purpose, the following steps are carried out in detail:
  • the high-pressure reaction vessel is treated with the sludge to be treated, in particular sewage sludge, e.g. Return sludge, excess sludge, scum, bulking sludge and the like, filled.
  • a gas is introduced into the sludge.
  • the gas entry can take place in two stages, whereby e.g. up to a pressure of 20 bar above atmospheric pressure, gas from a tank system, e.g. an oxygen tank is registered. Subsequently, as required, for example, to a pressure of 200 bar above atmospheric pressure residual gas, e.g. entered via bundles of bottles.
  • the required gas pressure in the high-pressure reaction vessel is maintained for a period of a few minutes to a few hours, depending on the desired degree of digestion of the biomass. Due to the very high gas enrichment, which can be up to 200 times higher than normal pressure, and the associated very high concentration gradient, the gas dissolved in the sludge diffuses into the cell interior until the concentration is equalized. Finally, the high-pressure reaction vessel is suddenly relaxed. The gas concentration in the aqueous phase falls back to the saturation value at normal pressure and the high gas overpressure in the cell leads to the bursting of the cell membrane. As a result, the cell contents are released, which leads to a substantial relief of subsequent processing and / or landfill steps.
  • the sludge emerging from the high-pressure reaction vessel during the expansion of the high-pressure reaction vessel is subjected to mechanical stress.
  • This mechanical stress can, for example, take place in an outlet fitting or upon impact in a collecting vessel.
  • further destruction of the cells takes place.
  • the drainability of the sludge is thereby further improved.
  • the gas or gas mixture used is preferably an oxygen-containing gas or gas mixture, in particular technically pure oxygen or oxygen-enriched gas Air, used.
  • oxygen-containing gas or gas mixture in particular technically pure oxygen or oxygen-enriched gas Air
  • Air oxygen-containing gas or gas mixture
  • the dissolved oxygen still present in the withdrawn sludge benefits further aerobic sludge treatment.
  • air in particular compressed air, as the gas mixture.
  • nitrogen or carbon dioxide is preferably used as the gas or gas mixture.
  • the gas or gas mixture can be introduced into the high-pressure reaction vessel in a continuous or pulsating manner. With pulsating entry, a particularly fine-bubble and uniform gas distribution is achieved in the high-pressure reaction vessel.
  • the drainability of sewage sludge is significantly improved, thereby reducing the cost of the overall sludge treatment.
  • the investment costs for the disintegration plant are very low compared to conventional plants.
  • the energy requirement is reduced compared to the known methods. Only for filling the reaction vessel with sewage sludge energy is required.
  • a simple, fully automatic operation of the disintegration system is possible.
  • a particular advantage of the method according to the invention is also that no additional process step for the separation of coarse material before the eigentli ⁇ Chen disintegration is required. Such a separation is necessary, for example, in high-pressure homogenizers and impingement jet processes in order not to block clogged nozzles. For stirred ball mills, sieves must be installed upstream.
  • the process according to the invention also has a positive effect that only low costs for repair and maintenance are incurred.
  • FIG. 2 shows a parallel connection of three high-pressure reaction vessels
  • the high-pressure reaction vessel 1 shown in FIG. 1 is designed as a tall, slender container. This achieves a uniform oxygen, nitrogen or carbon dioxide enrichment of the total sludge volume as the gas bubbles rise. In addition, the container costs can be reduced due to smaller wall thicknesses.
  • the sewage sludge to be treated is fed via a pump 2 and a sludge feed line 3 and a supply fitting 4 to the head of the high-pressure reaction vessel 1.
  • return sludge, overlay sludge, scum or bulking sludge can be used as sewage sludge to be treated.
  • the sewage sludge is distributed uniformly over the container volume via a perforated bottom 5 arranged at the top of the high-pressure reaction container 1.
  • a level switches 6 and 7, which are in communication with a control device 8 the level in the high-pressure reaction vessel 1 can be controlled.
  • the control device 8 controls the pump 2 accordingly.
  • gas in particular oxygen, nitrogen or carbon dioxide, is introduced into the sewage sludge present in the high-pressure reaction vessel 1.
  • a pressure gauge 11, a control unit 12 and a control valve 13 are provided in the gas supply line 9.
  • the control unit 12 is also connected to the inlet fitting 4 and a homogenizing valve 14 at the lower sludge outlet of the high-pressure reaction vessel Tm.
  • the gas entry into the sewage sludge takes place in two stages. Up to a pressure in the high-pressure reaction vessel 1 of 20 bar above atmospheric pressure gas is introduced from a tank system, not shown in the figure, via line 9 and gas nozzle 10. Subsequently, the remaining gas is introduced from gas cylinder bundle as required up to a pressure of 200 bar above atmospheric pressure. The required gas pressure in the high-pressure reaction vessel 1, depending on the desired degree of digestion of the biomass for a time of a few minutes held up to a few hours.
  • the dissolved gas diffuses into the cell interior up to the concentration equilibrium.
  • the gas concentration in the aqueous phase drops to the saturation value at atmospheric pressure and the high gas overpressure in the cell causes the cell membrane to burst.
  • the sewage sludge treated in this way exits through the homogenizing valve 14 and an outlet nozzle 15 connected thereto into a collecting container 16.
  • a baffle plate 17 is arranged, on which the sewage sludge impinges. Additional mechanical stressing of the sewage sludge exiting at high pressure in the homogenizing valve 14 and the impact plate 17 upon impact causes further destruction of the cells. The drainability of the sludge is thereby additionally improved.
  • FIG. 2 shows a parallel connection of three high-pressure reaction vessels.
  • the same parts of the installation are designated by the same reference numerals as in FIG. 1.
  • the sewage sludge inlet 3 is divided into the three identically designed high-pressure reaction vessels 1.
  • the gas supply 9 is divided.
  • a common collecting container 16 is provided, which can also be designed as a drainage channel and has a sludge outlet 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un procédé pour traiter des boues contenant de la biomasse, par exemple, des boues de curage. Ce procédé consiste à mettre la boue dans une cuve de réaction haute pression (1), dans laquelle est introduit un gaz ou un mélange gazeux. Dans cette cuve de réaction haute pression (1) la haute pression est maintenue à un niveau tel que le gaz ou le mélange gazeux se diffuse dans la biomasse. Par détente soudaine de la cuve de réaction haute pression (1), la concentration gazeuse tombe en phase aqueuse, de sorte qu'une surpression gazeuse apparaît dans la biomasse qui est alors désagrégée. Par exemple, des membranes de cellules contenues dans la biomasse éclatent et libèrent ainsi leur contenu, ce qui permet d'améliorer notablement, par exemple, l'aptitude à l'égouttage de la boue.
PCT/EP2005/008474 2004-09-03 2005-08-04 Procede pour desagreger des boues WO2006027062A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05773333A EP1784364A1 (fr) 2004-09-03 2005-08-04 Procede pour desagreger des boues

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004042773 2004-09-03
DE102004042773.9 2004-09-03
DE200410058462 DE102004058462A1 (de) 2004-09-03 2004-12-03 Verfahren zur Desintegration von Schlämmen
DE102004058462.1 2004-12-03

Publications (1)

Publication Number Publication Date
WO2006027062A1 true WO2006027062A1 (fr) 2006-03-16

Family

ID=35058108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/008474 WO2006027062A1 (fr) 2004-09-03 2005-08-04 Procede pour desagreger des boues

Country Status (3)

Country Link
EP (1) EP1784364A1 (fr)
DE (1) DE102004058462A1 (fr)
WO (1) WO2006027062A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1832334A1 (fr) * 2006-03-03 2007-09-12 Linde Aktiengesellschaft Réacteur à haute pression pour le traitement des boues et procédé d'opération
WO2013117686A1 (fr) 2012-02-08 2013-08-15 Veolia Water Solutions & Technologies Support Appareil pour l'hydrolyse continue

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007055563A1 (de) * 2007-11-20 2009-06-10 J. F. Knauer Industrie-Elektronik Gmbh Verfahren und Vorrichtung zum Behandeln von Schlamm
EP2181968A1 (fr) * 2008-10-28 2010-05-05 Demetrion Rechte GmbH Procédé et appareil pour la pressurisation et le traitement thermique d'une suspension liquide
CN108545901B (zh) * 2018-04-28 2021-11-09 重庆交通大学 一种生化污泥调理设备
CN108585392B (zh) * 2018-04-28 2021-03-23 重庆交通大学 一种高压泄放式生化污泥调理方法
CN109775945A (zh) * 2019-03-07 2019-05-21 环创(厦门）科技股份有限公司 生活污泥的破壁方法及其破壁装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564074A1 (fr) * 1992-04-01 1993-10-06 Texaco Development Corporation Traitement de boue d'épuration
DE19715819C1 (de) * 1997-04-16 1998-02-12 Invent Gmbh Verfahren zum Aufschluß von gasförmiger Stoffwechselprodukte erzeugenden Mikroorganismen
US5785852A (en) * 1995-04-06 1998-07-28 Midwest Research Institute Pretreatment of high solid microbial sludges
US20040060863A1 (en) * 2001-02-14 2004-04-01 Hojsqaard Soren J. Method and installation for the thermal hydrolysis of sludge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564074A1 (fr) * 1992-04-01 1993-10-06 Texaco Development Corporation Traitement de boue d'épuration
US5785852A (en) * 1995-04-06 1998-07-28 Midwest Research Institute Pretreatment of high solid microbial sludges
DE19715819C1 (de) * 1997-04-16 1998-02-12 Invent Gmbh Verfahren zum Aufschluß von gasförmiger Stoffwechselprodukte erzeugenden Mikroorganismen
US20040060863A1 (en) * 2001-02-14 2004-04-01 Hojsqaard Soren J. Method and installation for the thermal hydrolysis of sludge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1832334A1 (fr) * 2006-03-03 2007-09-12 Linde Aktiengesellschaft Réacteur à haute pression pour le traitement des boues et procédé d'opération
WO2007101521A1 (fr) * 2006-03-03 2007-09-13 Linde Aktiengesellschaft Reacteur haute pression pour la preparation de boues et procede pour faire fonctionner ce reacteur haute pression
WO2013117686A1 (fr) 2012-02-08 2013-08-15 Veolia Water Solutions & Technologies Support Appareil pour l'hydrolyse continue

Also Published As

Publication number Publication date
DE102004058462A1 (de) 2006-03-09
EP1784364A1 (fr) 2007-05-16

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