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EP2454204A2 - Dispositif et procédé de dénitrification bio-électrochimique de fluides - Google Patents

Dispositif et procédé de dénitrification bio-électrochimique de fluides

Info

Publication number
EP2454204A2
EP2454204A2 EP10754900A EP10754900A EP2454204A2 EP 2454204 A2 EP2454204 A2 EP 2454204A2 EP 10754900 A EP10754900 A EP 10754900A EP 10754900 A EP10754900 A EP 10754900A EP 2454204 A2 EP2454204 A2 EP 2454204A2
Authority
EP
European Patent Office
Prior art keywords
denitrification
takes place
cathode
transport
anode
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP10754900A
Other languages
German (de)
English (en)
Inventor
Rüdiger HAAS
Florian Pfeiffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2454204A2 publication Critical patent/EP2454204A2/fr
Withdrawn legal-status Critical Current

Links

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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • 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
    • C02F3/005—Combined electrochemical biological processes
    • 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
    • C02F3/08—Aerobic processes using moving contact bodies
    • C02F3/082—Rotating biological contactors
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
    • 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
    • C02F3/08—Aerobic processes using moving contact bodies
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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 an apparatus and a method for purifying fluids using bioelectrochemical methods.
  • the special feature of the device and method is the continuous removal of nitrates
  • the removal of nitrate from sewage and drinking water is playing an increasingly important role.
  • the invention is suitable for the removal of nitrate from all fluids, be it wastewater, drinking water, residual water or organic and inorganic solutions of all kinds.
  • Organisms are strong, on the other hand the taste of the cultured animals
  • the aim of wastewater treatment is the removal of nitrates and
  • Nitrogen compounds with the aid of microbial nitrification Nitrogen compounds with the aid of microbial nitrification and
  • Nitrification is the bacterial oxidation of ammonia (NH 3 ) to nitrate (NO 3 ' ).
  • the nitrification consists of two coupled sub-processes: In the first part, ammonia is oxidized to nitrite, which is oxidized to nitrate in the second sub-process.
  • the nitrifying bacteria cause a chemolithoautotrophic metabolism.
  • Denitrification is understood to mean the conversion of nitrogen bound in nitrate (N (V) to molecular nitrogen (N 2 ) by bacteria called denitrifiers.)
  • the denitrifiers are mostly heterotrophic bacteria and some autotrophic bacteria.
  • activated sludge The process is also referred to as "activated sludge.”
  • the wastewater is brought about by the metabolic activity of optionally anaerobic or carbon-heterotrophic microorganisms, the so-called activated sludge.
  • bioelectrochemical denitrification is suitable primarily for treatment plants in combination with aerobic processes using sessile
  • Sessile biofilms include, but are not limited to: trickling filter, submerged packed bed, suspended or fluidized bed, sand filter, disc immersion body,
  • an artificial carbon source may also assist the present invention.
  • Anode cell by means of a biofilm that forms on the anode.
  • Tension between a nobler and a base leader is used.
  • Carbon conversion takes place on bioelectrochemical route, the oxidation of NHX to NOX takes place in an external aerobic reactor.
  • the purified and nitrate-enriched water is then used in the cathode compartment of the fuel cell as an electron acceptor.
  • RO reverse osmosis
  • IE ion exchanger
  • ED electro-dialysis
  • a disadvantage of existing processes for denitrification in the activated sludge process is the higher energy requirement and the increased accumulation of excess sludge, as well as the additional expense of measurement and control technology.
  • JP2002086189A discloses a method for removing nitrogen from wastewater. There is disclosed a bioelectrochemical pretreatment unit. There are added denitrifying microorganisms controlled and so-called.
  • EP0573226B1 discloses an immobilized biocatalyst electrode and a water treatment method using the electrode. This process involves the electrolysis of water and requires the application of voltage to allow the electrolysis of the water to produce hydrogen. The process is energy-intensive and not suitable for practical use.
  • Hardly degradable carbon compounds can be oxidized
  • the system consists of three parts: anodic half-element, oxidizing reactor (2) and cathodic half-element (3). Anode and cathode are connected via an electrical conductor, a control unit can
  • anodic half element (Anodic HE) (1)
  • dirty water flows.
  • An anode on which a biofilm forms is immersed in the medium.
  • the anode part can be arranged before, in or after the first sedimentation tank (primary clarification).
  • a pre-cleaning of the wastewater or a reduction of the primary sludge takes place. If the anode is arranged in the primary sludge, its operation reduces the primary sludge. If the anode is introduced into the wastewater stream, then it comes to a carbon degradation. Due to the carbon degradation, the subsequent oxic / oxidative / aerobic reactor can be made smaller.
  • oxidizing reactor (2) In the part of the plant called oxidizing reactor (2), the oxidation of the carbon compounds to CO 2 and the oxidation of the nitrogen compounds to nitrate NO 3 take place. Important is the fact that in the aerobic stage (2)
  • Nitrogen compounds are converted to nitrate. In the aerobic stage, therefore, the nitrification takes place. Preferably takes place in the oxidizing reactor
  • FIG. 1 and FIG. 2 depict a disk submersible system.
  • Cathodic HE In the cathodic half-element (Cathodic HE) (3) is a cathode which is covered with a biofilm.
  • the cathode may be placed in front of, in or after the second sedimentation tank "secondary clarification.” Electrons are supplied through a conduit (4) from the anode 1.
  • a biofilm of organisms capable of forming the nitrate forms on the cathode convert into atmospheric nitrogen.
  • an arrangement in the aerobic reactor (2) may also be advantageous.
  • the guide of the conductor (4) can be centered by the axis of a
  • an electrode material are substances that are electrically conductive, biologically neutral (non-toxic) and stable to the conditions in the wastewater such.
  • an electrically conductive plastic can also be used as the electrode material.
  • electrically conductive PP, PE, PA or PVDF comes into question.
  • the contaminated fluid stream preferably consisting of water or wastewater, is then passed through these stages, the fluid stream preferably containing carbon and nitrogen and nitrogen compounds.
  • the fluid stream preferably containing carbon and nitrogen and nitrogen compounds.
  • Particularly preferred is the use of domestic, municipal or industrial wastewater.
  • the invention is to be used in particular under unfavorable nutrient conditions in the fluid, that is to say, for example, for ratios which deviate from the C: N: P ratio of 100: 5: 1.
  • the inventive innovation relates inter alia. to the following features:
  • Wastewater treatment process consisting of:
  • Both half-element are spatially separated from each other and are not connected by a membrane to one, wherein the electron transport takes place via a conductor, the proton transport takes place via the flow of the medium or via an additional salt bridge (5)
  • Various bacteria which can pick up or release electrons directly from an anode or cathode and make them usable for metabolic processes.
  • the nitrate is oxidized directly to atmospheric nitrogen.
  • facultative anaerobic bacteria such as Paracoccus denitrificans, Pseudomonas props, Micrococcus denitrificans, Alealigenus, Pseudomonas, C. aceticum, A.
  • woodii, methanobactrium, Enterobacter cloacal and sulfuric acid reductases woodii, methanobactrium, Enterobacter cloacal and sulfuric acid reductases.
  • the proposed method can be used as a combination of microbial
  • Fuel cell and disc immersion body are formed.
  • the primary treatment corresponds to the anode chamber, here is a reduction of the
  • the transport of the electrons via an electrical conductor (4) is easily controlled by a voltmeter or potentiostat. There is no need to apply voltage from the outside, even a small current can be generated.
  • the control of the device or of the method takes place on the basis of the parameters oxygen content, nitrate, nitrite, ammonium, carbon dioxide and discharged stream.
  • the values are determined by measuring the potential between anode (1) and cathode (3) and a reference electrode. To increase the performance, however, a voltage can also be applied from the outside.
  • Half elements is a reflux of protons excluded. This is shown in FIG. 1.
  • anode (1) on which a biofilm, formed by bacteria which use the electrode as an electron acceptor.
  • the oxidation of carbonaceous compounds produces CO 2 and H + .
  • Salt bridge / electrolyte bridge (3) are arranged, which is arranged between anodic (1) and cathodic half-element (2). This will be necessary especially for sessile biofilms.
  • the ion-conducting compound (5) can be replaced by a gas, solid or a
  • the half-cells may be formed by a U-shaped
  • connection point can also be equipped with glass beads.
  • Figure 1 and Figure 2 uses disc diving body, since it is a proven method.
  • the method can be retrofitted into existing systems of different types and is intended on the one hand for retrofitting on the other hand for new construction. This can be done especially when retrofitting the system with disc bodies
  • bioelectrochemical denitrification according to the invention results in multiple
  • Aerobic reactor consisting of a disc dipping unit (2) with three chambers, wherein the first two chambers nitrify the aerobic and the third chamber whose wall is coated with electrically conductive plastic serves as a cathodic half-element (3) of the denitrification

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

La dénitrification dans le cadre de procédés relatifs à des biofilms sessiles, représente un problème qui jusqu'à présent dans les techniques des eaux usées n'a pas été solutionné de manière satisfaisante. En tant que donneur d'électrons pour l'oxydation du nitrate, des eaux usées sont remises en circulation ou du carbone artificiel est ajouté, les deux techniques s'avérant complexes et coûteuses. Le procédé selon l'invention permet de palier ces inconvénients et est mis en oeuvre avec des organismes qui sont en mesure de prendre en charge des électrons directement d'une cathode. Le procédé est écologique pour différents aspects : la consommation de courant est significativement réduire; la quantité de boues produite est réduire; et le processus est facilement réglable. Un avantage important pour l'environnement réside dans le fait que des systèmes économes en énergie comprenant des biofilms sessiles peuvent facilement et pour des frais limités, faire l'objet d'un renouvellement d'équipement.
EP10754900A 2009-07-15 2010-07-14 Dispositif et procédé de dénitrification bio-électrochimique de fluides Withdrawn EP2454204A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009026179A DE102009026179A1 (de) 2009-07-15 2009-07-15 Bioelektrolytische Denitrifikation
PCT/EP2010/060162 WO2011006939A2 (fr) 2009-07-15 2010-07-14 Dispositif et procédé de dénitrification bio-électrochimique de fluides

Publications (1)

Publication Number Publication Date
EP2454204A2 true EP2454204A2 (fr) 2012-05-23

Family

ID=43304965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10754900A Withdrawn EP2454204A2 (fr) 2009-07-15 2010-07-14 Dispositif et procédé de dénitrification bio-électrochimique de fluides

Country Status (3)

Country Link
EP (1) EP2454204A2 (fr)
DE (1) DE102009026179A1 (fr)
WO (1) WO2011006939A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112013002364A5 (de) 2012-05-07 2015-01-15 Florian Pfeiffer Vorrichtung und Verfahren zur bioelektrochemischen Stoffumwandlung (Herbeiführung einer Reduktion/Oxidation/Redox-Reaktion)
DE102016109606A1 (de) 2016-05-25 2017-11-30 Clausthaler Umwelttechnikinstitut Gmbh, (Cutec-Institut) Verfahren und Vorrichtungen zur bioelektrischen Stromgewinnung aus organischen Inhaltsstoffen eines Abwassers
CN114506926A (zh) * 2022-02-15 2022-05-17 山东本源环境科技有限公司 一种厌氧氨氧化污水处理系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009072887A1 (fr) * 2007-12-07 2009-06-11 Spark Origin B.V. Procédé et dispositif de conversion de la biomasse en méthane

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JPH06104230B2 (ja) * 1992-06-01 1994-12-21 正和 黒田 生体触媒固定化電極及び同電極を用いた水処理方法
DE4344613C2 (de) * 1993-12-24 1997-07-17 Hahnewald Gmbh Verfahren zur katalytisch-elektrochemischen Reduktion nitrathaltiger Lösungen sowie Verwendung der behandelten wäßrigen Lösungen als Regeneriermittel für Ionenaustauscher
ATE176778T1 (de) * 1994-07-26 1999-03-15 Johann Schwabegger Verfahren und vorrichtung zur reinigung von abwässern, insbesondere für vollbiologische hauskläranlagen
DE19807458A1 (de) * 1998-02-21 1999-08-26 Envicon Klaertech Verwalt Biologische Klärkammer und zugehöriges Abwasserreinigungsverfahren
JP2000051894A (ja) * 1998-08-07 2000-02-22 Sanyo Electric Co Ltd 汚水処理装置
JP2001145896A (ja) * 1999-11-19 2001-05-29 Mitsubishi Heavy Ind Ltd 窒素含有排水処理装置
JP4801244B2 (ja) * 2000-09-13 2011-10-26 日華化学株式会社 生物電気化学的処理による排水中の窒素成分の除去方法および除去装置
JP3906088B2 (ja) * 2002-02-04 2007-04-18 三洋電機株式会社 水処理装置
JP2006015237A (ja) * 2004-07-01 2006-01-19 Sanyo Electric Co Ltd 水処理装置
WO2008109911A1 (fr) * 2007-03-15 2008-09-18 The University Of Queensland Pile à combustible microbienne

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
WO2009072887A1 (fr) * 2007-12-07 2009-06-11 Spark Origin B.V. Procédé et dispositif de conversion de la biomasse en méthane

Non-Patent Citations (1)

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Title
See also references of WO2011006939A2 *

Also Published As

Publication number Publication date
DE102009026179A1 (de) 2011-01-27
WO2011006939A2 (fr) 2011-01-20
WO2011006939A3 (fr) 2011-03-10

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