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WO2007017529A1 - Support de micro-organismes destine a etre utilise dans des stations d'epuration d'eaux residuaires a lit fluidise - Google Patents

Support de micro-organismes destine a etre utilise dans des stations d'epuration d'eaux residuaires a lit fluidise Download PDF

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Publication number
WO2007017529A1
WO2007017529A1 PCT/ES2005/000455 ES2005000455W WO2007017529A1 WO 2007017529 A1 WO2007017529 A1 WO 2007017529A1 ES 2005000455 W ES2005000455 W ES 2005000455W WO 2007017529 A1 WO2007017529 A1 WO 2007017529A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
treatment plants
microorganisms
wastewater treatment
fluid bed
Prior art date
Application number
PCT/ES2005/000455
Other languages
English (en)
Spanish (es)
Inventor
Cesar Menendez Fernandez
Francisco Ortega Fernandez
Gemma M. Martinez Huerta
Nieves Roqueñi Gutierrez
Valeriano Alvarez Cabal
Original Assignee
Universidad De Oviedo
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 Universidad De Oviedo filed Critical Universidad De Oviedo
Priority to PCT/ES2005/000455 priority Critical patent/WO2007017529A1/fr
Publication of WO2007017529A1 publication Critical patent/WO2007017529A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
    • 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
    • C02F3/10—Packings; Fillings; Grids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30223—Cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30257—Wire
    • B01J2219/30261—Wire twisted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30257—Wire
    • B01J2219/30265—Spiral
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30296—Other shapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/304—Composition or microstructure of the elements
    • B01J2219/30466—Plastics
    • 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 present invention relates to a carrier of microorganisms used to decompose the contaminating elements of wastewater that are introduced into a treatment plant.
  • the object of the invention is the development of a carrier of microorganisms of special geometry characterized by a large surface that favors the creation of a biofilm and facilitates the flow of water through and around the carrier to enhance the contact and decomposition of the contaminating elements. by the biofilm; Likewise, it must have the smallest possible surface of contact with other carriers to avoid the release of the biofilm.
  • the basic principle of the fluid bed process is based on the growth of biomass in plastic supports that move in a biological reactor by means of continuous agitation generated by aeration systems.
  • the biological reactor generally consists of the following elements:
  • the effluent is introduced into the reactor where microorganisms grow by forming an organic film in the carrier elements that float in the fluid. These microorganisms break down the contaminating elements.
  • the geometric design of the carrier is therefore essential to achieve an optimal transfer of the substrate and oxygen to the biological film, resulting in an essential factor for good system performance.
  • the oxygen required by the microorganisms is supplied by the injection of air in the form of bubbles from the bottom of the reactor.
  • the bubble flow agitates the mixture and allows the carrier elements to be in continuous motion.
  • the treated effluent leaves the reactor through a screen using an air pump that prevents foaming problems.
  • the carrier of microorganisms for use in wastewater treatment plants of fluid bed that constitutes the object of this invention stands out mainly for showing a helical cylindrical design.
  • This design is based on the incorporation of one or more helical fins attached to a cylindrical body that can be solid or hollow, the number of helical fins can vary between 1 and 6 depending on the passage of the number of fins.
  • the cylindrical body In the case that the cylindrical body is solid, it only serves as a structural support for the helical fins and its radius is minimal; In the case that it is hollow in addition to being used as a structural support, it also allows the creation of a biofilm on its inner surface.
  • the carrier will preferably have the hollow cylindrical body.
  • the carriers have a relationship between the surface and the high occupied volume which allows a biologically active surface for a given volume, this value is greater than 500 m 2 / m 3 .
  • the carriers introduced in the medium do not occupy it completely but have sufficient space in the medium to facilitate a constant movement that allows the optimal aeration of all the surfaces of the carrier, occupying a volume in the medium between 40 and 75% .
  • the carriers within the fluidized bed will be subjected to a continuous movement so that the deposits on the surface are eliminated and the clogging disappears.
  • the helical fins instead of the cylindrical body, constitute the contact surfaces with the fins corresponding to other carriers, thus protecting most of the cylindrical body where the bacteria grow, also these helical fins prevent the agglutination of carriers when collisions occur.
  • the percentage of emptiness is directly related to the price of the piece for which it is interesting to keep it as high as possible to reduce the cost of carrier. It is considered that the percentage of emptiness of the carrier with respect to the envelope volume is greater than 70%.
  • the hollow of the carrier has an adequate size to facilitate, not only the creation of the biofilm, but also the flow through it to favor contact and the decomposition of the elements contaminants by the biofilm, thus preventing the gaps from being occluded by suspended materials or by the growth of the biofilm itself, thus avoiding the appearance of blockages or depositions on the carrier that would reduce the biological contact surface.
  • the carrier's component materials have a density very close to that of the water, so that any ascending or sinking movement is minimized and the movements occur randomly induced by the injection of air in the middle.
  • the density of the material is between 0.9 and 1.2 Kg / dm 3 .
  • the design of the carrier will also take into consideration a sufficient mechanical strength to avoid deformation caused by stresses in the contact between carriers, especially during the filling and emptying of the tank.
  • the carriers are preferably designed in materials resistant to corrosion and chemical attack such as plastics, which may incorporate inhibitors to prevent degradation due to the effect of ultraviolet radiation and which must be inert for all types of bacteria, considering that the carriers they can be, for example, polypropylene or polyethylene.
  • the material immersed in water for long periods of time is resistant to the degradation of both light, chemical, aerobic or anaerobic, also to favor that bacteria are located and grow on the surface of the carrier the surface of it is hydrophilic.
  • Figure 1. Shows a perspective view of the carrier of microorganisms object of this invention in its hollow cylindrical configuration with three helical fins.
  • Figure 2.- Shows an elevation view of the microorganism carrier represented in the previous figure.
  • Figure 3. Shows a plan view of the same carrier of microorganisms.
  • the carrier of microorganisms for use in wastewater treatment plants of fluid bed that constitutes the object of this invention is represented in the figures according to a possible embodiment of the invention.
  • the carrier is of the type that shows a surface in which a biofilm grows to decompose the contaminant elements of the wastewater and basically comprises a cylindrical body (1) around which one or more helical fins are located (2), preferably from 1 to 6, contemplating for the case represented in the figures a hollow cylindrical body (1) with three helical fins (2).
  • the carrier comprising a hollow cylindrical body (1) has a relationship between the inner radius r of the cylindrical body (1) and the outer radius R of the helical fin (2) of less than 1, preferably between 0 and 0 , 6, showing in the case of the figures a ratio of 0.5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

L'invention un support comprenant un corps cylindrique (1), de préférence creux, comportant au moins une ailette hélicoïdale (2) disposée autour du corps cylindrique (1), favorisant la formation d'un biofilm et facilitant la circulation de l'eau à travers et autour du support, et permettant de mettre en contact les éléments contaminants et le biofilm afin de décomposer les éléments contaminants. Par ailleurs, les ailettes hélicoïdales (2) permettent de réduire à un minimum la surface exposée aux contacts et, ainsi, d'éviter un décollement du biofilm lors d'un contact avec un autre support.
PCT/ES2005/000455 2005-08-09 2005-08-09 Support de micro-organismes destine a etre utilise dans des stations d'epuration d'eaux residuaires a lit fluidise WO2007017529A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2005/000455 WO2007017529A1 (fr) 2005-08-09 2005-08-09 Support de micro-organismes destine a etre utilise dans des stations d'epuration d'eaux residuaires a lit fluidise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2005/000455 WO2007017529A1 (fr) 2005-08-09 2005-08-09 Support de micro-organismes destine a etre utilise dans des stations d'epuration d'eaux residuaires a lit fluidise

Publications (1)

Publication Number Publication Date
WO2007017529A1 true WO2007017529A1 (fr) 2007-02-15

Family

ID=37727093

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2005/000455 WO2007017529A1 (fr) 2005-08-09 2005-08-09 Support de micro-organismes destine a etre utilise dans des stations d'epuration d'eaux residuaires a lit fluidise

Country Status (1)

Country Link
WO (1) WO2007017529A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2489036A (en) * 2011-03-17 2012-09-19 Biomatrix Water Technology Llp Attached growth media element for water treatment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236190A (ja) * 1985-08-09 1987-02-17 Morito Hasegawa テ−プ状微生物担体
EP0731062A2 (fr) * 1995-03-09 1996-09-11 Mass Transfer International Ltd. Eléments d'emballage
ES2135718T3 (es) * 1994-03-16 1999-11-01 Anox Biosystem Ab Soporte de biopelicula para la purificacion de agua y agua residual.
DE20210697U1 (de) * 2002-07-03 2002-10-17 Stöhr, Arno, 96364 Marktrodach Füll- und/oder Bewuchskörper aus Kunststoff
JP2003055562A (ja) * 2001-08-14 2003-02-26 Daicel Novafoam Ltd 押出成形体およびその製造方法
US20030127378A1 (en) * 2002-01-07 2003-07-10 Aqwise Wise Water Technologies Ltd. Biofilm carrier, method of manufacture thereof and waste water treatment system employing biofilm carrier
US20040182762A1 (en) * 2003-03-18 2004-09-23 Acqua Minerale S. Benedetto S.P.A. Carrier for biofilm to be used in wastewater purification plants

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236190A (ja) * 1985-08-09 1987-02-17 Morito Hasegawa テ−プ状微生物担体
ES2135718T3 (es) * 1994-03-16 1999-11-01 Anox Biosystem Ab Soporte de biopelicula para la purificacion de agua y agua residual.
EP0731062A2 (fr) * 1995-03-09 1996-09-11 Mass Transfer International Ltd. Eléments d'emballage
JP2003055562A (ja) * 2001-08-14 2003-02-26 Daicel Novafoam Ltd 押出成形体およびその製造方法
US20030127378A1 (en) * 2002-01-07 2003-07-10 Aqwise Wise Water Technologies Ltd. Biofilm carrier, method of manufacture thereof and waste water treatment system employing biofilm carrier
DE20210697U1 (de) * 2002-07-03 2002-10-17 Stöhr, Arno, 96364 Marktrodach Füll- und/oder Bewuchskörper aus Kunststoff
US20040182762A1 (en) * 2003-03-18 2004-09-23 Acqua Minerale S. Benedetto S.P.A. Carrier for biofilm to be used in wastewater purification plants

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2489036A (en) * 2011-03-17 2012-09-19 Biomatrix Water Technology Llp Attached growth media element for water treatment
GB2489036B (en) * 2011-03-17 2015-10-14 Biomatrix Water Technology Llp Attached growth media element

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