WO1996038387A1 - Procede d'epuration biologique de l'eau destine a la culture de plantes sur substrat, filtre et unite de filtrage associes - Google Patents

Procede d'epuration biologique de l'eau destine a la culture de plantes sur substrat, filtre et unite de filtrage associes Download PDF

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Publication number
WO1996038387A1
WO1996038387A1 PCT/NL1996/000214 NL9600214W WO9638387A1 WO 1996038387 A1 WO1996038387 A1 WO 1996038387A1 NL 9600214 W NL9600214 W NL 9600214W WO 9638387 A1 WO9638387 A1 WO 9638387A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
water
filter unit
filter material
mineral wool
Prior art date
Application number
PCT/NL1996/000214
Other languages
English (en)
Inventor
Joseph Maria Elise Beaujean
Jacob Frank De Groot
Original Assignee
Rockwool/Grodan B.V.
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 Rockwool/Grodan B.V. filed Critical Rockwool/Grodan B.V.
Priority to AU58463/96A priority Critical patent/AU5846396A/en
Publication of WO1996038387A1 publication Critical patent/WO1996038387A1/fr

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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/103—Textile-type packing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/105—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container downward filtration without specifications about the filter material supporting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/38—Feed or discharge devices
    • B01D24/42—Feed or discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B01D29/073—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets with wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • 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 method for bio ⁇ logical cleaning of water, to a method for the substrate culture of plants, and to a filter and a filter unit therefor.
  • organ ⁇ isms such as bacteria and other single-cell organisms which not only biologically convert organic substances present in the dirty water but also separate out, and even deactivate/destroy micro-organisms present in the dirty water, in particular fungi.
  • the systems used up to the present time for sand bed filtration comprise a first collection tank for dirty water, a tank connected thereto and provided with a sand bed, and finally a tank for clean water.
  • silos are required with a diameter of 3-6 metres.
  • the sand bed used is relatively high because the grain size in this sand bed changes over the height and because, as a result of the sand filter bed becoming clogged, the top layer must be continually removed, while the filter also has its greatest biological activity in this top layer.
  • rockwool has a filtering action on gases and liquids.
  • Rockwool acts partially as a sieve and the material for separation partially adheres to the surface of the rockwool fibres.
  • a biological environment can thus result with its own affinity for material for separation.
  • An important problem in making filters based on rockwool as filter material is to obtain sufficient homogeneity. This problem arises particularly in larger filters because leakage paths can therein occur round the used rockwool material. Such leakage paths occur when the rockwool is used as granulate and as coherent products.
  • the drawback occurs here relative to sand filters because the sand used in sand filters is pressed under the influence of its own specific weight and will thus tend to close off possible leakage paths.
  • the present invention has for its object to provide a different filter system for biological cleaning of water, wherein a notably higher cleaning efficiency is obtained which, under well-chosen conditions, even achieves an efficiency of more than 99.5% to even 100%.
  • the present invention is based on the insight that if mineral wool is chosen as filter material a markedly better biologically cleaning system is obtained because compared to sand the pore volume is at least 4 times greater and the suction forces acting during the filtra- tion are 3-4 times smaller, which means that when mineral wool is used as filter material such a biofilter has an action that is 4-16 times better, i.e. can be constructed 4-16 times more compactly in the same filtering condi ⁇ tions, wherein the problem of the dangers of the presence of leakage paths is resolved. Compared to sand mineral wool moreover has the advantage that it is a markedly lighter material with a larger internal surface, thus resulting in less danger of blockage and a lower pressure drop.
  • Such a biological mineral wool filtration system according to the invention generally operates at tempera ⁇ tures from 10°C to about a maximum of 29°C, while temper ⁇ atures far below zero (-10°C) can occur temporarily.
  • the filter system according to the invention could possibly operate such that in the mineral wool filter material a microflora, i.e. micro-organisms, in particu ⁇ lar bacteria, will form which not only remove organic materials but which also deactivate fungi.
  • a microflora i.e. micro-organisms, in particu ⁇ lar bacteria
  • a layer thickness of about 50 centimetres will generally be sufficient, while in the case of sand use must be made of a filter material thickness of 1-2 metres. Because operation takes place with a relatively small layer thickness the problem of leakage paths is particularly great and frequently even fatal.
  • the biological material for cleaning can be any material in which organic substances, and in particular harmful micro-organisms, occur, such as water which is supplied to biological treatment installations, but particularly water that has been in contact with plants and micro-organisms, such as water from aquariums.
  • the method according to the invention is particularly appli- cable in recirculation systems for the horticultural sector wherein water/nutrient water is supplied to the plants, collected again and recirculated in order to optimize the environmental impact and the cost of the system.
  • This filter material may consist of a rolled-up strip of mineral wool but the use is recommend ⁇ ed of filter material packages which consist of a longi ⁇ tudinal envelope of watertight material having therein either the rolled-up strip of mineral wool or the mineral wool granulate.
  • a filter material package can consist of a strip of mineral wool which is rolled up, wherein the rolled package practically covers sub- stantially the whole surface of the filter unit through which there is flow.
  • the filter material package instead of one filter material package it is possible to use a large number of filter material packages which cover substantially the whole surface of the filter unit through which there is flow.
  • the sealing material is preferably arranged between the packages and is in particular a sealing material which swells under the influence of water and contains for this purpose a water-swelling material preferably in combination with a carrier material.
  • a sealing material which swells under the influence of water and contains for this purpose a water-swelling material preferably in combination with a carrier material.
  • Trisoplast ® obtainable from General Industrial Development Benelux B.V. , Velddriel
  • the filter unit comprises a filter tank provided with a layer of filter material and having a dirty water inlet and a clean water outlet separated therefrom by the layer of filter materi ⁇ al, and an inlet for fresh water separated from the dirty water inlet by a flexible membrane.
  • a filter unit has the advantage that it can operate at a practically constant hydrostatic pressure because this pressure is determined by the height of the dirty water layer present in the filter unit which is separated by means of a flexible membrane from the cleaned water likewise present therein. A reduced supply of dirty water is then combined with more clean water being retained in the filter unit and vice versa.
  • the flexible membrane is preferably provided with non-return valves operating on the dirty water side.
  • the present invention relates to a method for the substrate culture of plants, wherein water op- tionally containing nutrients is recirculated and the recirculated water is purified with a filter unit accord ⁇ ing to the invention.
  • mineral wool is used as filter material.
  • the mineral wool can consist of rock- wool, glass wool, slag wool, ceramic wool and mixtures thereof. All known types of mineral wool can be applied in the fibre lengths and fibre diameter distributions known in the prior art .
  • a mineral wool is used in the form of a granulate having dimensions of 1 millimetre to 5 centimetres, in general about 6 milli ⁇ metres.
  • the mineral wool in the form of a package which can take the form of a shape-retaining mat or the form of a strip of mineral wool which is rolled up in the manner of a spiral or a plurality of mineral wool strips rolled up in the manner of a spiral which may optionally be provided on the outer side with a foil, whereby the flow through such rolled-up filter material packages takes place axially.
  • the filter material according to the invention it is possible to dispense with the origi ⁇ nal known filter systems which are also provided with a dirty water tank and a clean water tank. By making use of a membrane these dirty water and clean water tanks can even be integrated into the tank provided with the layer of filter material.
  • fig. 1, 2 and 5 each show a filter unit according to the invention
  • fig. 3 and 4 each show a different type of filter for use in a filter unit as shown in fig. 1, 2 and 5.
  • Fig. 1 shows a filter system 1 according to the invention.
  • This filter system 1 comprises a dirty water tank 3 with a dirty water inlet 5 provided with a pump 4.
  • the dirty water tank 3 is connected to a filter unit 8 according to the invention via a conduit 7 provided with a pump 6, wherein the dirty water inlet conduit 7 is separated from a filtered clean water outlet 9 by a layer of filter material 10 according to the invention.
  • Outlet 9 is provided with a pump 11 and connects onto a clean water tank 12 which drains the clean water out of the filter system 1 via the conduit 14 provided with a pump 13.
  • the filter system 1 can be used for multiple applica ⁇ tions but is particularly characterized by the use of the layer of filter material 10 consisting of mineral wool, in this example rolls 15 of mineral wool, which rolls are mutually separated by sealing material 16 which extends over the whole height of rolls 15 because these are not provided with a watertight longitudinal envelope.
  • Such a system can be used for cleaning water.
  • the filter unit 8 has a diameter of about 3 metres when the area amounts to about 1 hectare.
  • Fig. 2 shows a filter system 2 according to the invention, wherein the dirty water tank and the clean water tank 12 are now integrated into the filter unit 18 according to the invention.
  • Filter unit 18 is provided with a dirty water inlet 19 having upstream a pre-filter 20 for filtering out floating parts and larger particles, in addition to a unit 21 for supplying air/oxygen from the reservoir 22 and heat via the heat exchanger 23.
  • the pre-filter 20 can be switched on and off via a three-way tap 24.
  • Fig. 3 shows in more detail the filter material packages 26 which are enclosed in a plastic foil 18 wherein the interspaces are filled with sealing material 29.
  • These filter material packages 26 are manufactured for instance from a strip of mineral wool with a density of 25-50 kg/m 3 and have a height of about 50 centimetres and a diameter of 52 centimetres.
  • Fig. 4 shows a layer of filter material 37 which consists of a rolled-up strip 38 of mineral wool.
  • FIG. 5 shows a filter unit 40 which comprises a filter tank 41 with a dirty water inlet 42 which is separated from a clean water outlet 43 by a layer of filter material consisting of filter packages 44.
  • the packages are provided with a watertight longitudinal envelope 45 so that they are open to water at both end surfaces 46 and 47. Leakage paths are not possible on account of the sealing material as shown in fig. 2 ar ⁇ ranged between the packages and the tank.
  • the clean water outlet 43 is provided with a pump 48 which carries clean water 50 via a recirculation conduit 49 onto the flexible membrane 51 provided with non-return valves 52. Via a flexible hose 53 water can be drained to the substrate culture.
  • aerating means which comprise an air pump 54 and an air pipe 55 provided with holes and a turbulent flow is thus generated as according to the ovally round arrows 56 in the layer of water located between the filter material and the flexible membrane. Due to this turbulence with air oxygen is added to the water, which enhances the biological environment inside the filter.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Filtering Materials (AREA)

Abstract

La présente invention se rapporte premièrement à un procédé d'épuration biologique de l'eau qui consiste à faire passer l'eau à travers un filtre comportant de la laine minérale en tant que matière filtrante, l'eau ayant été de préférence mise en contact avec des plantes et/ou des organismes, deuxièmement à un filtre, destiné à l'épuration biologique de l'eau, comportant une matière filtrante constituée de laine minérale, troisièmement à une unité de filtrage comportant un corps de filtre doté d'une couche de matière filtrante et possédant un orifice d'admission de l'eau sale et un orifice d'évacuation de l'eau épurée séparés l'un de l'autre par la couche de matière filtrante, ainsi qu'un orifice d'admission d'eau d'alimentation, séparé de l'orifice d'admission d'eau sale par une membrane souple. Cette invention se rapporte également à un procédé de culture de plantes sur substrat dans lequel on recycle de l'eau contenant éventuellement des éléments nutritifs, l'eau recyclée étant purifiée avec une unité de filtrage du type décrit dans l'invention.
PCT/NL1996/000214 1995-05-31 1996-05-31 Procede d'epuration biologique de l'eau destine a la culture de plantes sur substrat, filtre et unite de filtrage associes WO1996038387A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU58463/96A AU5846396A (en) 1995-05-31 1996-05-31 Method for biological cleaning of water, for the substrate c ulture of plants, and a filter and a filter unit therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1000463A NL1000463C2 (nl) 1995-05-31 1995-05-31 Werkwijze voor het biologisch reinigen van water, voor de substraatteelt van planten, en een filter en een filtereenheid daarvoor.
NL1000463 1995-05-31

Publications (1)

Publication Number Publication Date
WO1996038387A1 true WO1996038387A1 (fr) 1996-12-05

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PCT/NL1996/000214 WO1996038387A1 (fr) 1995-05-31 1996-05-31 Procede d'epuration biologique de l'eau destine a la culture de plantes sur substrat, filtre et unite de filtrage associes

Country Status (3)

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AU (1) AU5846396A (fr)
NL (1) NL1000463C2 (fr)
WO (1) WO1996038387A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0852222A1 (fr) * 1997-01-06 1998-07-08 Cultilene BV Procédés et dispositifs pour la désinfection et le recyclage d'un effluent aqueux
WO2003064005A2 (fr) * 2002-01-29 2003-08-07 Walter Hauer Materiau filtrant
WO2005124236A3 (fr) * 2004-06-18 2006-04-27 Ultra Violet Star Holding B V Procede et appareil pour purifier l'eau des micro-organismes et systeme d'amenee d'eau et unite de douche munis de cet appareil
DE102012011816A1 (de) 2011-06-28 2013-01-03 Roland Graf Filter für Aquarien, Fischteiche, Schwimmbecken, Schwimmteiche odgl.
AT516276B1 (de) * 2015-03-19 2016-04-15 Egon Gruber Filtereinrichtung
WO2016167832A1 (fr) * 2015-04-16 2016-10-20 Dow Global Technologies Llc Ensemble de filtration comprenant des bioréacteurs enroulés en spirale et modules de membranes d'hyperfiltration
WO2016167831A1 (fr) * 2015-04-16 2016-10-20 Dow Global Technologies Llc Ensemble filtration comprenant des bioréacteurs et modules à membranes, enroulés en spirale, placés dans des cuves sous pression séparées
US9725344B1 (en) 2014-09-24 2017-08-08 Dow Global Technologies Llc Spiral wound filtration assembly including integral bioreactor
WO2017165091A1 (fr) 2016-03-23 2017-09-28 Dow Global Technologies Llc Ensemble bioréacteur
JP2018143902A (ja) * 2017-03-01 2018-09-20 鹿島建設株式会社 生物処理用微生物担体及び固定床の製造方法
WO2020174082A1 (fr) 2019-02-28 2020-09-03 Rockwool International A/S Procédé de filtration de boue

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048075A (en) * 1974-05-06 1977-09-13 The Carborundum Company Filter cartridge
GB1563306A (en) * 1976-08-25 1980-03-26 Hellqvist A Process and a device for purifying water

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048075A (en) * 1974-05-06 1977-09-13 The Carborundum Company Filter cartridge
GB1563306A (en) * 1976-08-25 1980-03-26 Hellqvist A Process and a device for purifying water

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758135A1 (fr) * 1997-01-06 1998-07-10 Saint Gobain Isover Procedes et dispositifs pour la desinfection et le recyclage d'un effluent aqueux
EP0852222A1 (fr) * 1997-01-06 1998-07-08 Cultilene BV Procédés et dispositifs pour la désinfection et le recyclage d'un effluent aqueux
WO2003064005A2 (fr) * 2002-01-29 2003-08-07 Walter Hauer Materiau filtrant
WO2003064005A3 (fr) * 2002-01-29 2003-12-18 Walter Hauer Materiau filtrant
WO2005124236A3 (fr) * 2004-06-18 2006-04-27 Ultra Violet Star Holding B V Procede et appareil pour purifier l'eau des micro-organismes et systeme d'amenee d'eau et unite de douche munis de cet appareil
EP2282132A3 (fr) * 2004-06-18 2013-01-02 Ultra Violet Star Holding B.V. Vase à fleurs avec dispositif pour la désinfection de l'eau; procédé pour la désinfection de l'eau dans vases à fleur
DE102012011816A1 (de) 2011-06-28 2013-01-03 Roland Graf Filter für Aquarien, Fischteiche, Schwimmbecken, Schwimmteiche odgl.
US10358366B2 (en) 2014-09-24 2019-07-23 Dow Global Technologies Llc Spiral wound filtration assembly including integral bioreactor
US9725344B1 (en) 2014-09-24 2017-08-08 Dow Global Technologies Llc Spiral wound filtration assembly including integral bioreactor
AT516276B1 (de) * 2015-03-19 2016-04-15 Egon Gruber Filtereinrichtung
AT516276A4 (de) * 2015-03-19 2016-04-15 Egon Gruber Filtereinrichtung
US11945734B2 (en) 2015-03-19 2024-04-02 Gruber Egon Filter device
WO2016167831A1 (fr) * 2015-04-16 2016-10-20 Dow Global Technologies Llc Ensemble filtration comprenant des bioréacteurs et modules à membranes, enroulés en spirale, placés dans des cuves sous pression séparées
CN107530631A (zh) * 2015-04-16 2018-01-02 陶氏环球技术有限责任公司 包含定位在独立的压力容器中的螺旋卷绕生物反应器和膜模块的过滤总成
US10286361B2 (en) 2015-04-16 2019-05-14 Dow Global Technologies Llc Filtration assembly including spiral wound bioreactors and hyperfiltration membrane modules
US10335737B2 (en) 2015-04-16 2019-07-02 Dow Global Technologies Llc Filtration assembly including spiral wound bioreactors and membrane modules positioned in separate pressure vessels
CN107531526B (zh) * 2015-04-16 2021-04-06 陶氏环球技术有限责任公司 包含螺旋卷绕生物反应器和超滤膜模块的过滤总成
WO2016167832A1 (fr) * 2015-04-16 2016-10-20 Dow Global Technologies Llc Ensemble de filtration comprenant des bioréacteurs enroulés en spirale et modules de membranes d'hyperfiltration
WO2017165091A1 (fr) 2016-03-23 2017-09-28 Dow Global Technologies Llc Ensemble bioréacteur
JP2018143902A (ja) * 2017-03-01 2018-09-20 鹿島建設株式会社 生物処理用微生物担体及び固定床の製造方法
WO2020174082A1 (fr) 2019-02-28 2020-09-03 Rockwool International A/S Procédé de filtration de boue

Also Published As

Publication number Publication date
AU5846396A (en) 1996-12-18
NL1000463C2 (nl) 1996-12-03

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