• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    There is described a method and apparatus for optimizing sludge dewatering from a biological cleaning process wherein the sludge is fed to a dewatering apparatus. In order to improve the sludge structure, it is proposed that the sludge be sonicated before being fed to the dewatering apparatus and dewatered to alter the sludge structure to provide better charge balance between the sludge and a conditioning agent, before, where or after at least one sludge conditioner is added to the sludge.
    公开号:AT521104A1
    申请号:T50223/2018
    申请日:2018-03-16
    公开日:2019-10-15
    发明作者:
    申请人:Dr Ulrich Kubinger；
    IPC主号:
    专利说明:

    The invention relates to a method and a device for optimizing the dewatering of sludge from a biological purification process, in particular from wastewater treatment, wherein the sludge is fed to a dewatering device.
    Municipal wastewater is purified, for example by means of aeration process, whereby polluted water is purified with the help of bacteria. In addition, chemical precipitants are used to reduce the phosphate content. Subsequently, the cleaned wastewater is discharged and fed to the remaining sludge of a separate treatment. After this treatment, sludge remains for disposal or recycling. In order to largely free the sludge pending disposal of water flocculants of polymer or the like are added, and fed to a dewatering unit. Dewatering devices such as screw presses are used for dewatering. The dewatered sludge should have the lowest possible liquid content. However, it has been shown that there is room for improvement, especially with regard to the achievable drainage result.
    A general problem in sewage sludge dewatering is the reproducibility of permanently good results. An existing dewatering unit can not always achieve the same good drainage results with the constantly changing sludge properties (load changes, seasonal changes, procedural changes, etc.). So far, only a permanent manual care (flow rate, aggregate setting, polymer setting, etc.) can achieve a consistently good result.
    / 9
    The invention is thus based on the object of specifying a method and a device for dewatering sludge, with which a continuously good result can be achieved and, in addition, the achievable dewatering result can be improved.
    The invention solves this problem by ultrasonically sonicating the sludge before it is fed to the dewatering apparatus and dehydrated to alter the sludge structure to provide better charge balance between the sludge and at least one conditioning agent, before, where or after the sludge is added to the sludge conditioning agent.
    This results in a defined change in the sludge structure for drainage improvement. With ultrasonic sonication of the sludge according to the invention, the flake surface is prepared in such a way that the added sludge conditioning agent, in particular a polymer, can better act and act on the sludge by improved charge equalization.
    Sludge conditioning agent can be added to the sludge before, during sonication and / or afterwards.
    The sludge to be dewatered is preferably pretreated with ultrasound immediately before it is metered into the sludge conditioning agent, usually a polymer, and the sludge is fed to the dehydrator. In this case, the energy input is to be selected such that the ultrasound effect does not cause cell destruction. It is only so much energy entered that the mud structure or the mud surface changes and subsequently the mud conditioning agent idealized conditions finds to unfold its full effect for the charge balance can.
    For this purpose, it is particularly recommended if the sludge is sonicated with at least one frequency between 20 and 100kHz, in particular with a frequency of 25kHz, / 9 and / or the sludge with a specific power of 1 to 1000 W / kg solids contained in the sludge.
    It is advantageous for the sludge to be metered with 0.1 to 100 kg of active ingredient of the sludge conditioning agent per 1000 kg of solid contained in the sludge. The active ingredient of the sludge conditioning agent may, for example, be polyacrylamide as a solid or liquid as a solution. The sludge conditioning agent may also comprise a plurality of conditioning agents, for example, phosphate or magnesium ammonium phosphate precipitating agents.
    By means of the pretreatment of the sludge to be dehydrated according to the invention, ideal and approximately constant conditions are created for the dewatering device. The active surface in the sludge is changed, which allows the conditioning agent better bind to the mud, or better penetrate the sludge suspension, and sometimes form scherstabilere mud flakes. This leads to an improved drainage result.
    The entire sludge to be dewatered is changed in the full or partial flow by the ultrasound in such a way that, despite the very different conditions in the sludge structure, approximately constant conditions are created for the dewatering device and thus an optimum result can always be achieved. With the proposed optimization, the dewatering result of sewage sludge can be improved by up to 20% (for example, from 20% to 24% solids discharge). In addition, by establishing defined conditions, the polymer can be optimally adjusted for conditioning, and thus an overdose can be avoided.
    A device according to the invention for optimizing the dewatering of sludge from a biological purification process, in particular from wastewater treatment, comprises a dewatering device. In front of the dewatering device, a sludge-sounding ultrasonic system is arranged.
    / 9
    The ultrasonic system is a metering device for metering a sludge conditioning agent to the mud forward and / or assigned or downstream of a metering device for metering at least a sludge conditioning agent to the sludge.
    By pretreatment with ultrasound, the supplied sludge conditioning agent can achieve a better charge balance, which results in shear-stable mud flakes, which can subsequently be dewatered better.
    In the drawing, the subject invention is shown, for example.
    A device for dewatering sludge 1 from a biological purification process comprises a dewatering device 2, which upstream of the sludge 1 sonicating ultrasound system 3 is to optimize the drainage. The ultrasonic system 3 is a metering device 4 for metering a sludge conditioning agent 5 to the sludge 1 and / or downstream. In the dewatering apparatus 2, the thus pretreated sludge 1 is dewatered and the liquid phase 6 is separated from the solid phase 7 of the sludge 1.
    / 9
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. Gerd Hübscher
    Dipl.-Ing. Karl Winfried Hellmich Spittelwiese 4, 4020 Linz
    权利要求:
    Claims (7)
    [1]
    claims
    A method for optimizing the dewatering of sludge from a biological purification process, in particular from the wastewater treatment, which is fed to a dewatering device, characterized in that the sludge before it is fed to the dewatering apparatus and dewatered is sonicated with ultrasound to change the sludge structure in such a way in that a better charge balance is provided between the sludge and a conditioning agent before, after or after which at least one sludge conditioning agent is added to the sludge.
    [2]
    2. The method according to claim 1, characterized in that the sludge is sonicated with at least one frequency between 20 and 100kHz, in particular with a frequency of 25kHz.
    [3]
    3. The method according to claim 1 or 2, characterized in that the sludge is sonicated with a specific power of 1 to 1000 W / kg solids contained in the sludge.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the sludge 0.1 to 100 kg of active ingredient of the sludge conditioning agent per 1000 kg solids contained in the sludge is metered.
    [5]
    5. A device for optimizing the dewatering of sludge (1) from a biological purification process, in particular from wastewater treatment, with a dewatering device (2), characterized in that the
    [6]
    6/9
    Dewatering device (2) upstream of the sludge (1) sonicated before dewatering ultrasonic system (3).
    6. Apparatus according to claim 5, characterized in that the ultrasonic system (3) is associated with a metering device (4) for metering a sludge conditioning agent (5) to the sludge (1).
    [7]
    7. The device according to claim 5 or 6, characterized in that the ultrasonic system (3) a metering device (4) for metering a sludge conditioning agent (5) to the mud (1) forward and / or downstream.
    类似技术:
    公开号 | 公开日 | 专利标题
    DE60313452T2|2008-01-03|METHOD FOR THE TREATMENT OF MUD FROM WATERWORKS AND WASTEWATER TREATMENT PLANTS
    EP1757562B1|2008-07-23|Device and process for treating residues of biogas production, manure and sludge
    EP3539932A1|2019-09-18|Method for optimizing the dewatering of sludge from a biological purification process
    EP0209533A1|1987-01-28|Process and system for the flocculation substances which can be flocculated in suspensions, especially for cleaning the discharge water of deinking plant.
    DE2946338A1|1980-05-29|METHOD FOR WATER TREATMENT, WASTE WATER TREATMENT AND PURIFICATION OF POLLUTED WATER, AND FOR SLUDGE COMPRESSION AND SYSTEM FOR CARRYING OUT THIS METHOD
    CH679578A5|1992-03-13|
    DE102005058968A1|2007-06-14|A combination of ultrafiltration and reverse osmosis is used on a partial flow basis to remove suspended and dissolved material from recycled water e.g. swimming pool filtration
    DE202005019293U1|2006-03-02|Apparatus for removing particles and dissolved materials from swimming bath water has prefiltration unit, flocculating agent injection point and ultrafiltration unit, some filtrate being dechlorinated and treated by reverse osmosis
    DE2341415A1|1975-02-27|Chemical waste water processing - using purifier contg. calcium carbonate, acid and or metal sulphate, oil adsorbent and flocculant
    CH637905A5|1983-08-31|Process and equipment for effluent treatment
    AT523008B1|2021-11-15|Process for optimizing the dewatering of sludge containing microorganisms
    AT521226B1|2020-10-15|Sludge conditioning agent to optimize the dewatering of sludge
    EP1086929A1|2001-03-28|Process for recycling water in a at least partially closed water cycle
    DE102007012086A1|2008-09-18|Process for treating excess sludge in a sewage treatment plant
    DE10242150A1|2004-03-11|Process and assembly to condition sewage sludge by exposure to alternating current electrical field in conjunction with selected additives
    DE102020004653B4|2022-03-17|Method and device for processing a thixotropic bentonite soil suspension
    AT408750B|2002-02-25|METHOD AND DEVICE FOR WASTE WATER TREATMENT
    DE2038153B2|1980-11-27|Device for separating suspended solids from an aqueous suspension
    DE3127570A1|1983-04-28|METHOD AND DEVICE FOR FLOCKING FILTRATION OF WASTEWATER
    DE102013110303A1|2015-03-19|Treatment of wastewater with colloidal ingredients
    DE2026694A1|1971-12-09|Treatment of impure waters - with secondary flocculation
    DE2503605A1|1976-08-05|Thermal disinfection of effluents - without disintegrator using screens settling tanks filters and steam heated solid and liq sterilizers
    WO2004039734A1|2004-05-13|Device and method for processing liquid manure by means of electroflotation
    DE2611727A1|1976-09-23|PROCEDURE FOR WATER PURIFICATION AND WATER PURIFICATION SYSTEM FOR CARRYING OUT THE PROCEDURE
    DE102011106387A1|2013-01-10|Process for the treatment of sewage sludge
    同族专利:
    公开号 | 公开日
    EP3539932A1|2019-09-18|
    AT521104B1|2021-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2009065509A1|2007-11-20|2009-05-28|J.F. Knauer Industrie-Elektronik Gmbh|Method and device for treating sludge|
    WO2014118666A1|2013-01-29|2014-08-07|Basf Se|Process for dewatering mineral tailings by the treatment of these tailings with at least one anionic polymer and at least one cationic polymer|
    WO2015173741A1|2014-05-16|2015-11-19|Basf Se|Process for dewatering mineral tailings by the treatment of these tailings with at least one surfactant and at least one polymer|
    US10669179B2|2014-11-20|2020-06-02|Columbia Water Holdings, Inc.|Method for treatment of a wastewater stream containing dissolved compounds or ions|
    CN106430878A|2016-11-11|2017-02-22|湖北君集水处理有限公司|Method for conditioning and dewatering sludge of water purifying plant|AT523008B1|2019-09-20|2021-11-15|Kubinger Dr Ulrich|Process for optimizing the dewatering of sludge containing microorganisms|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50223/2018A|AT521104B1|2018-03-16|2018-03-16|Method for optimizing the dewatering of sludge from a biological cleaning process|ATA50223/2018A| AT521104B1|2018-03-16|2018-03-16|Method for optimizing the dewatering of sludge from a biological cleaning process|
    EP19163074.8A| EP3539932A1|2018-03-16|2019-03-15|Method for optimizing the dewatering of sludge from a biological purification process|
    [返回顶部]