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BRPI0813055A2 - Processo para a conversão de biomassa de recursos naturais renováveis para biogás em digestores anaeróbicos - Google Patents

Processo para a conversão de biomassa de recursos naturais renováveis para biogás em digestores anaeróbicos

Info

Publication number
BRPI0813055A2
BRPI0813055A2 BRPI0813055-8A2A BRPI0813055A BRPI0813055A2 BR PI0813055 A2 BRPI0813055 A2 BR PI0813055A2 BR PI0813055 A BRPI0813055 A BR PI0813055A BR PI0813055 A2 BRPI0813055 A2 BR PI0813055A2
Authority
BR
Brazil
Prior art keywords
biogas
subjected
reactor
natural resources
anaerobic fermenter
Prior art date
Application number
BRPI0813055-8A2A
Other languages
English (en)
Inventor
Bjoern Schwarz
Burghard Fassauer
Eberhard Friedrich
Hannelore Friedrich
Alexander Michaelis
Original Assignee
Fraunhofer Ges Forschung
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40175991&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BRPI0813055(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of BRPI0813055A2 publication Critical patent/BRPI0813055A2/pt

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P5/00Preparation of hydrocarbons or halogenated hydrocarbons
    • C12P5/02Preparation of hydrocarbons or halogenated hydrocarbons acyclic
    • C12P5/023Methane
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M23/00Constructional details, e.g. recesses, hinges
    • C12M23/58Reaction vessels connected in series or in parallel
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M45/00Means for pre-treatment of biological substances
    • C12M45/02Means for pre-treatment of biological substances by mechanical forces; Stirring; Trituration; Comminuting
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M45/00Means for pre-treatment of biological substances
    • C12M45/04Phase separators; Separation of non fermentable material; Fractionation
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M45/00Means for pre-treatment of biological substances
    • C12M45/06Means for pre-treatment of biological substances by chemical means or hydrolysis
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M45/00Means for pre-treatment of biological substances
    • C12M45/20Heating; Cooling
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/02Biological treatment
    • C02F11/04Anaerobic treatment; Production of methane by such processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/18Treatment of sludge; Devices therefor by thermal conditioning
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • Microbiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Clinical Laboratory Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
BRPI0813055-8A2A 2007-07-30 2008-07-23 Processo para a conversão de biomassa de recursos naturais renováveis para biogás em digestores anaeróbicos BRPI0813055A2 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007037202A DE102007037202A1 (de) 2007-07-30 2007-07-30 Verfahren zur Konversion von Biomasse zu Biogas in anaeroben Fermentern
PCT/EP2008/059677 WO2009016082A2 (de) 2007-07-30 2008-07-23 Verfahren zur konversion von biomasse aus nachwachsenden rohstoffen zu biogas in anaeroben fermentern

Publications (1)

Publication Number Publication Date
BRPI0813055A2 true BRPI0813055A2 (pt) 2014-12-30

Family

ID=40175991

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0813055-8A2A BRPI0813055A2 (pt) 2007-07-30 2008-07-23 Processo para a conversão de biomassa de recursos naturais renováveis para biogás em digestores anaeróbicos

Country Status (9)

Country Link
US (1) US20100203608A1 (pt)
EP (1) EP2183374B1 (pt)
CN (1) CN101778944A (pt)
AT (1) ATE549411T1 (pt)
BR (1) BRPI0813055A2 (pt)
DE (1) DE102007037202A1 (pt)
ES (1) ES2383107T3 (pt)
PL (1) PL2183374T3 (pt)
WO (1) WO2009016082A2 (pt)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009009920A1 (de) 2009-02-18 2010-08-26 Meyer, Herwig, Dipl.-Landw. Einrichtung zur verbesserten Gasausbeute durch weiteren Aufschluss von organischer Biomasse in Biogasanlagen
DE202009002537U1 (de) 2009-02-18 2009-04-30 Meyer, Herwig, Dipl.-Landw. Einrichtung zur verbesserten Gasausbeute durch weiteren Aufschluss von organischer Biomasse in Biogasanlagen
FR2942792B1 (fr) * 2009-03-06 2012-06-29 Otv Sa Procede d'obtention de boues imputrescibles et d'energie et installation correspondante
DE102009024536A1 (de) 2009-06-10 2010-12-16 Lts Leipziger Technologie Service Gmbh Verfahren zum effizienten Betrieb von Biomasse- Vergärungsanlagen
DE102009035875A1 (de) 2009-08-03 2011-02-24 Dge Dr.-Ing. Günther Engineering Gmbh Verfahren zur Herstellung von Bio- oder Klärgas
DE102009059947A1 (de) 2009-12-22 2011-06-30 BIONIK GmbH - Innovative Technik für die Umwelt, 65232 Verfahren zur Erhöhung der Gasausbeute in einer Gärvorrichtung, insbesondere einer Biogasanlage oder einem Fermenter, sowie Verwendung einer Vorrichtung zur Durchführung eines solchen Verfahrens
KR101216193B1 (ko) * 2010-06-04 2012-12-27 주식회사 부강테크 투입원료의 양질화 기술을 적용한 바이오가스 생산 방법 및 설비
CN101864358B (zh) * 2010-06-10 2012-07-25 贵州大学 一种连续式太阳能生物质能发酵装置
DE102011008186B4 (de) 2011-01-10 2018-09-20 Dge Dr.-Ing. Günther Engineering Gmbh Verfahren zur Herstellung von Biogas aus überwiegend stärkehaltigen Rohstoffen als Biomasse
DE102011015611B4 (de) 2011-03-30 2014-12-11 Hochschule Magdeburg-Stendal (Fh) Verfahren zur Erzeugung von Biogas aus organischen Substraten
DE102011016604A1 (de) * 2011-04-09 2012-10-11 Dge Dr.-Ing. Günther Engineering Gmbh Verfahren und Vorrichtung zur Herstellung von Biogas aus Gärsubstrat
EP2602327A1 (de) 2011-12-06 2013-06-12 Michael Niederbacher Verfahren zur Erzeugung von Biogas aus Biomasse sowie Biogasanlage
FR2992308B1 (fr) * 2012-06-20 2017-05-12 Degremont Procede de traitement de dechets organiques, en particulier de boues de stations d'epuration, et installation pour la mise en œuvre de ce procede
CN102965278B (zh) * 2012-11-28 2014-05-07 华南理工大学 一种高效两相厌氧发酵装置
WO2014093799A1 (en) * 2012-12-14 2014-06-19 Bp Corporation North America Inc. Process for the conversion of cellulosic feedstock materials
DE102012112898A1 (de) 2012-12-21 2014-06-26 Verbio Vereinigte Bioenergie Ag Verfahren und Anlage zur Herstellung von Biogas aus lignocellulosehaltiger Biomasse
DE102014103660A1 (de) * 2014-03-18 2015-09-24 Universität Rostock Einrichtung und Verfahren zum biologischen Abbau eines Substrats
EP2942388A1 (de) * 2014-05-08 2015-11-11 M&M engineering GmbH Verfahren zum Erzeugen von Biogas und Biogasanlage
ES2744536T3 (es) 2014-10-30 2020-02-25 Eliquo Stulz Gmbh Procedimiento y dispositivo para el tratamiento de masa orgánica con espesamiento y tratamiento térmico
EP3015432A1 (de) 2014-10-30 2016-05-04 Eliquo Stulz GmbH Verfahren und Vorrichtung zur Behandlung von organischer Masse mit Faulschlamm-Rückführung
AT518499A1 (de) * 2016-04-04 2017-10-15 Sfl Tech Gmbh Verfahren und Vorrichtung zur Aufbereitung von Biomasse
DE102017005627A1 (de) 2016-10-07 2018-04-12 Lennart Feldmann Verfahren und System zur Verbesserung der Treibhausgas-Emissionsminderungsleistung biogener Kraft-, Heiz- und Brennstoffe und/oder zur Anreicherung landwirtschaftlich genutzter Flächen mit Humus-C
CN106830583A (zh) * 2017-04-24 2017-06-13 张红星 一种畜禽废水处理系统
CN108485931B (zh) * 2018-05-04 2023-12-19 江西洁地环境治理生态科技有限公司 一种基于小球藻处理发酵沼液的连续处理系统
DE102018123058A1 (de) * 2018-09-19 2020-03-19 Biogastechnik Süd GmbH Vorrichtung und Verfahren zur Volumenreduktion von Biomasse
EP3653719A1 (en) * 2018-11-16 2020-05-20 NGF Nature Energy Biogas A/S A method of producing biomass degradation products
GB2586145A (en) * 2019-08-07 2021-02-10 Ibj Tech Ivs Improvements in or relating to heat exchangers
CN111500647A (zh) * 2020-05-21 2020-08-07 新沂百川畅银新能源有限公司 一种基于农林废弃物的沼气厌氧的制备工艺
DE102023116085A1 (de) * 2023-06-20 2024-12-24 Eric Bochert Biogasanlage zur Erzeugung von Biogas und Gärprodukt
CN117535123B (zh) * 2023-10-31 2024-06-21 浙江中科沃尔德生物科技有限公司 一种高效生物质中高温厌氧发酵制天然气系统及利用其制天然气工艺

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928815A1 (de) * 1988-12-13 1990-06-21 Still Otto Gmbh Verfahren zur behandlung von biomassen, z. b. bei der biologischen abwasserreinigung anfallenden klaerschlaemmen, guelle, sonstigen mikrobiologischen oder nachwachsenden biomassen
DE4226087A1 (de) 1992-04-16 1993-10-21 Recycling Energie Abfall Verfahren zur biologischen Aufbereitung organischer Substanzen, insbesondere zur anaeroben biologischen Hydrolyse zur anschließenden Biomethanisierung und Vorrichtung zur Durchführung des Verfahrens
DE4308921A1 (de) * 1993-03-19 1994-09-22 Linde Kca Dresden Gmbh Verfahren zur Behandlung von Bioabfällen oder dergleichen
DE4333468C2 (de) * 1993-10-01 1998-01-29 Thyssen Still Otto Gmbh Verfahren zur Behandlung von biogenen Restmassen
FR2711980B1 (fr) 1993-11-05 1998-01-02 Degremont Procédé de traitement par digestion aérobie des boues résiduaires urbaines ou industrielles.
JP2997833B2 (ja) 1993-12-28 2000-01-11 日立造船株式会社 下水汚泥の嫌気性消化方法
DE19858187C5 (de) 1998-03-16 2006-05-18 Eisenmann Maschinenbau Gmbh & Co. Kg Verfahren und Vorrichtung zur Reduzierung der organischen Anteile eines ausfaulbaren Substrats
CN1471409B (zh) * 2000-08-22 2013-08-07 Gfe专利股份公司 淤浆分离和沼气生产的方案
US6905600B2 (en) * 2001-11-16 2005-06-14 Ch2M Hill, Inc. Method and apparatus for the treatment of particulate biodegradable organic waste
WO2004076082A1 (en) * 2003-02-28 2004-09-10 Bioenergi Danmark A/S Process for treatment of an organic waste material
WO2005017091A1 (de) * 2003-07-17 2005-02-24 Michael Hanel Biogasfermentationsanlage
DE10345600A1 (de) 2003-09-29 2005-04-28 Eisenmann Kg Maschbau Fermenter, Biogaskraftwerk sowie Verfahren zur Fermentierung von Biomasse zu Biogas
NL1025346C2 (nl) * 2004-01-29 2005-08-01 Seghers Keppel Technology Grou Een werkwijze voor het behandelen van organisch slib.
US7309435B2 (en) * 2004-03-02 2007-12-18 Rozich Alan F Biological process for waste treatment and energy production
JP2008516758A (ja) * 2004-10-19 2008-05-22 バイオ−サーキット エーピーエス 嫌気性加水分解によるバイオガス生産設備
DE102007012104A1 (de) * 2007-03-13 2008-09-18 Stirl Anlagentechnik Gmbh Verfahren zum Hybridaufschluss von lignocellulosehaltiger Biomasse

Also Published As

Publication number Publication date
WO2009016082A3 (de) 2009-05-07
EP2183374B1 (de) 2012-03-14
ES2383107T3 (es) 2012-06-18
PL2183374T3 (pl) 2012-10-31
CN101778944A (zh) 2010-07-14
ATE549411T1 (de) 2012-03-15
WO2009016082A2 (de) 2009-02-05
US20100203608A1 (en) 2010-08-12
EP2183374A2 (de) 2010-05-12
DE102007037202A1 (de) 2009-02-05

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B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]