WO2009154539A1 - Lit de plantes flottant utilisé pour le traitement biologique des eaux - Google Patents

Lit de plantes flottant utilisé pour le traitement biologique des eaux Download PDF

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Publication number
WO2009154539A1
WO2009154539A1 PCT/SE2009/000311 SE2009000311W WO2009154539A1 WO 2009154539 A1 WO2009154539 A1 WO 2009154539A1 SE 2009000311 W SE2009000311 W SE 2009000311W WO 2009154539 A1 WO2009154539 A1 WO 2009154539A1
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WO
WIPO (PCT)
Prior art keywords
blanket
sludge
bed
aeration chamber
net
Prior art date
Application number
PCT/SE2009/000311
Other languages
English (en)
Inventor
Stanislaw Lazarek
Wlodzimierz Lawacz
Lars-Erik Einevik
Original Assignee
Phytohydrology Europe Ab
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 Phytohydrology Europe Ab filed Critical Phytohydrology Europe Ab
Publication of WO2009154539A1 publication Critical patent/WO2009154539A1/fr

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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/28Raised beds; Planting beds; Edging elements for beds, lawn or the like, e.g. tiles
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007Contaminated open waterways, rivers, lakes or ponds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/02Odour removal or prevention of malodour
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Definitions

  • the present invention pertains to a biological bed consisting of a balanced community of autotrophic and heterotrophic organisms forming a functional system mimicking structures and functions of natural communities of aquatic and terrestrial plants with associated invertebrates.
  • Biological wastewater treatment in most conventional plants is carried out by application of activated sludge.
  • activated sludge This is in a form of suspended fine particles with high concentration of heterotrophic microbial communities. It means that their growth js sustained by continuous supply of organic compounds (sewage) and oxygen.
  • activated sludge In order to ensure that microbial degradation processes in sewage run properly, activated sludge must be pontinuously agitated. High continuous production of activated sludge also brings a necessity for continuous evacuation of "excessive sludge".
  • the most commonly used technological process is based on aeration of wastewater and activated sludge in chambers equipped with compressed air diffusers.
  • the present invention pertains to new type of biological bed, Green Blanket TM that mimics structure of natural community of aquatic and terrestrial plants with inhabiting invertebrates.
  • the structure and processes within Green Blanket TM find application in improvement of efficiency of aeration chambers in conventional wastewater treatment plants and in restoration of heavily polluted surface waters.
  • the simplicity in construction, low investment and operation costs combined with apparently high efficiency of water purification, offers worldwide commercial application of the Green Blanket TM in upgrading of all types of conventional biological wastewater treatment.
  • the present invention sets forth a biological bed mimicking a structure of a natural community of aquatic and terrestrial plants with inhabiting invertebrates.
  • the invention comprises: a prefabricated extendable blanket of tubular net structures with a predesigned mechanism for support and development of plant roots (rhizosphere) and floaters for additional positive buoyancy, while offering a large extended surface for bio-film development.
  • One embodiment comprises the net is extended through joints assembling the structure and forming a monolithic flat structure covering the surface of an aeration chamber.
  • tubular netting is creating a biological bed consisting of a rhisosphere and a bio-film when in operation.
  • present invention sets forth a system adapted to an aeration chamber, which is containing a biological bed mimicking a structure of a natural community of aquatic and terrestrial plants with inhabiting invertebrates.
  • the present invention system thus comprises: a prefabricated extendable flat tubular net blanket structure; a tube in the flat net structure containing a pre-designed mechanism for to support and secure development of plant roots, while offering a large extended surface for bio-film development, and the aeration chamber being equipped with an air diffusing system imposing a vertical flow of liquid from the bottom up and down again, the blanket positioned on the surface of the aeration chamber continuously being supplied by activated sludge, partly becoming incorporated into bio-film covering the surface of root and the tubular netting system; and the bed being supplied with oxygen supporting aerobic processes.
  • An embodiment of the present invention system comprises that the rhisosphere is continuously supplied with nutrients and warm water sustaining biological activity of the blanket also during the winter.
  • a further embodiment comprises that there is a continuous process of sludge flotation towards the surface of the aeration chamber which parallels the sedimentation process of fractions of the sludge and the incorporation of another part of sludge into the rhisosphere.
  • Still a further embodiment provides that roots of aquatic plants release biologically active substances, among them the coagulating compounds which have a positive effect on transformation of pollutants from a dissolved phase into a suspended phase.
  • Yet another embodiment provides a continuous compacting and densification process of suspended matter in the structure of the blanket which is self-regulated by comprising the processes: of sedimentation, including the more suspended matter which becomes retained in the blanket, the higher probability that transformed particles return to the bottom of the aeration chamber; and grazing by invertebrates due to ideal life conditions in the blanket supplied by heat, oxygen, and nutrients resulting in a massive growth of invertebrates grazing on sludge particles.
  • Fig. 1 schematically illustrates a cross sectional view of a flat tubular net blanket structure in accordance with an embodiment of the present invention
  • Fig. 2 illustrates a part of a prefabricated tubular net in accordance with the present invention.
  • the present invention benefits from practical experience in applications of constructed wetlands for wastewater treatment and knowledge of eco-physiology of aquatic and terrestrial vegetation in relation to nutrient loading and hydraulics. Introducing autotrophic elements organized in form of "plaur" to the heterotrophic system based on activated sludge will in a natural way and in accordance with Nature's laws restore equilibrium between respiration (activated sludge) and photosynthesis (green vegetation).
  • FIG. 1 schematically illustrating a cross sectional view of a flat tubular net blanket structure in accordance with an embodiment of the present invention as a biological bed 10.
  • vertical arrows depict convection of heat, oxygen and flotation of particles applied.
  • Functions of the Green Blanket are depicted by Zones 10.
  • Fig. 2 illustrates a part of a prefabricated tubular net in accordance with the present invention. It depicts a prefabricated tubular 12 net assembled by a mechanical clamp device for instance placed where X points in Fig. 2. In the direction of Y floaters provide additional positive buoyancy.
  • Green Blanket TM mimics and follows organization of naturally occurring "plaur”. It's a construction that allows for stabile setting of green plants, macrophytes on the surface of a liquid in such a way that the roots and rhizosphere have free room for growth and expansion in a continuous contact with liquid environment.
  • a prefabricated tubular net construction is applied put together using designed clamps X (Fig. 2) in form of panels in dimensions: 100 x 100 x 20 cm. Actual measures are not intended to limit the invention to those. They are given as examples of a possible embodiment. Any amount of panels is than put together by for instance click-joints forming a monolithic flat structure covering the surface of an aeration chamber. Every tube 12 in this flat structure contains a special fine-mesh netting 14 inside in order to support and secure development of plant roots while offering a large extended surface for bio-film development.
  • bio-bed integrated biological bed
  • tubular 12 netting 14 it creates a new type of integrated biological bed (bio-bed) consisting of a rhisosphere and a bio-film making up a bio-bed 10.
  • the bio-bed 10 becomes inhabited by numerous water invertebrate species that consume organic material accumulated in the bio-bed 10.
  • the aeration chambers equipped with air diffusing systems are characterized by vertical flow of liquid from the bottom up and down again.
  • the Green Blanket TM positioned on the surface of the aeration chamber is continuously supplied by activated sludge, part of which becomes incorporated into bio-film covering the surface of the root and tubular netting system.
  • the bio-bed 10 is also supplied with oxygen which prevents anaerobic processes.
  • Warm water and continuous supply of nutrients do the rhisospere also sustain biological activity of the Green BlanketTM during the winter.
  • Continuous flotation of sludge particles towards the surface parallels the sedimentation process of some fractions of sludge as well as incorporation of another part of sludge into the rhisosphere.
  • Roots of aquatic plants release many biologically active substances. Some of the organic substances are dissolved coagulating compounds which can have a positive effect on transformation of pollutants from a dissolved phase into a suspended phase.
  • Continuous compacting and densification process of suspended matter in the structure of Green Blanket is self-regulated by two processes: Process of sedimentation - the more suspended matter becomes retained in the Green Blanket the higher probability that transformed particles return to the bottom of the aeration chamber.
  • the Green Blanket zone converts into the missing link in the natural food chain or trophic pyramid where the simplified microbial heterotrophic system (activated sludge) is complemented by new, substantially richer trophic pyramid consisting of hundreds of invertebrate species that are integrated with autotrophic plant community of high biological diversity.
  • biomass of the activated sludge in aeration chambers is in the range of 3 to 5 kilograms of dry weight in one cubic meter. Assuming the depth of an aeration chamber to be 5 meters, the liquid column of one square meter would contain between 15 to 25 kilograms of sludge. By introducing the Green Blanket TM to such conditions would in 2-3 months growth, result in a biomass density of one square meter of Green Blanket TM close to 100 kilograms and it will still be on the ascending curve.
  • Such high biomass consists of the above water vegetation (5 - 10 kg) and a "hydrosoif - concentrated activated sludge incorporated in rhizomes and roots of plants with associated very high biomass of invertebrates.
  • the higher floor of macrophyte consists of plants type Cyperus and Carex.
  • the Green Blanket offers to concrete structures of conventional wastewater treatment plants an aesthetic greenery which will have a positive effect on the surrounding environment and people.
  • the present invention is not limited to given examples and embodiments, but to what a person skilled in the art can derive from the attached set of claims.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Environmental Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Hydroponics (AREA)

Abstract

L'invention concerne un lit biologique (10) imitant la structure d'un écosystème naturel de plantes aquatiques et terrestres habitées par des  invertébrés. Le lit biologique comprend une structure formant nappe préfabriquée en treillis tubulaire plat extensible et un tube (12) placé dans la structure en treillis plat et contenant un filet (14) à mailles fines pré-incorporé, afin de soutenir et d'assurer le développement de racines de plantes tout en présentant une importante surface déployée pour le développement de biofilm.
PCT/SE2009/000311 2008-06-18 2009-06-18 Lit de plantes flottant utilisé pour le traitement biologique des eaux WO2009154539A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7359408P 2008-06-18 2008-06-18
US61/073,594 2008-06-18
SE0801421-9 2008-06-18
SE0801421 2008-06-18

Publications (1)

Publication Number Publication Date
WO2009154539A1 true WO2009154539A1 (fr) 2009-12-23

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WO (1) WO2009154539A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102060386A (zh) * 2010-11-17 2011-05-18 中国科学院南京地理与湖泊研究所 一种漂浮湿地构建方法
CN102976495A (zh) * 2012-12-11 2013-03-20 中国水产科学研究院长江水产研究所 一种用于精养鱼池水质控制的无机固定化生物浮床
CN103193323A (zh) * 2013-04-19 2013-07-10 北京市水产科学研究所 利用景天三七进行水体生态修复的方法
CN103359834A (zh) * 2013-06-21 2013-10-23 河海大学 一种风与光耦合的富氧纳米基质复合生态浮床
CN103739076A (zh) * 2013-12-17 2014-04-23 昆山瀚潮环保科技有限公司 一种广适性净水生态浮岛
CN105236583A (zh) * 2015-10-28 2016-01-13 河海大学 莲藕形可曝气的富营养化沉积物修复***
CN106305389A (zh) * 2016-08-23 2017-01-11 岭南师范学院 一种可降解的锦竹草生态毡及其快速繁殖成坪方法
WO2017025711A3 (fr) * 2015-08-07 2017-03-30 Biomatrix Water Solutions Limited Écosystème flottant
CN108439608A (zh) * 2018-06-14 2018-08-24 安徽省大地园林工程有限公司 一种湿地公园水生植物水环境净化方法
CN109956559A (zh) * 2019-04-11 2019-07-02 吉林建筑大学 一种新型水母状立体生态浮床空间装置
CN111003795A (zh) * 2019-12-28 2020-04-14 哈尔滨工业大学 一种利用生物电化学强化浮动生态床的水体原位修复方法
CN112174329A (zh) * 2020-09-15 2021-01-05 同济大学 微电解强化型生态浮床耦合光催化的地表水生态修复装置

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JPH1056892A (ja) * 1996-08-16 1998-03-03 Mitsui Sekika Sanshi Kk 浮遊式水耕栽培システム及びこれを利用する水質浄化 装置
JP2002017167A (ja) * 2000-07-11 2002-01-22 Masahiro Mizushima 植物栽培方法
JP2002126777A (ja) * 2000-10-25 2002-05-08 Kawasaki Steel Corp ろ過槽および水処理方法
CN1355145A (zh) * 2001-12-18 2002-06-26 章永泰 浮床式污水净化装置
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JP2002017167A (ja) * 2000-07-11 2002-01-22 Masahiro Mizushima 植物栽培方法
JP2002126777A (ja) * 2000-10-25 2002-05-08 Kawasaki Steel Corp ろ過槽および水処理方法
JP2002192148A (ja) * 2000-12-25 2002-07-10 Akimoto Miyahara 水質浄化浮遊体
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102060386A (zh) * 2010-11-17 2011-05-18 中国科学院南京地理与湖泊研究所 一种漂浮湿地构建方法
CN102976495A (zh) * 2012-12-11 2013-03-20 中国水产科学研究院长江水产研究所 一种用于精养鱼池水质控制的无机固定化生物浮床
CN102976495B (zh) * 2012-12-11 2013-10-30 中国水产科学研究院长江水产研究所 一种用于精养鱼池水质控制的无机固定化生物浮床
CN103193323A (zh) * 2013-04-19 2013-07-10 北京市水产科学研究所 利用景天三七进行水体生态修复的方法
CN103359834A (zh) * 2013-06-21 2013-10-23 河海大学 一种风与光耦合的富氧纳米基质复合生态浮床
CN103739076A (zh) * 2013-12-17 2014-04-23 昆山瀚潮环保科技有限公司 一种广适性净水生态浮岛
WO2017025711A3 (fr) * 2015-08-07 2017-03-30 Biomatrix Water Solutions Limited Écosystème flottant
CN107846854A (zh) * 2015-08-07 2018-03-27 生物基质水处理解决方案有限公司 漂浮生态***
GB2554840A (en) * 2015-08-07 2018-04-11 Biomatrix Water Solutions Ltd Floating ecosystem
GB2554840B (en) * 2015-08-07 2019-05-01 Biomatrix Water Solutions Ltd Floating ecosystem
CN105236583A (zh) * 2015-10-28 2016-01-13 河海大学 莲藕形可曝气的富营养化沉积物修复***
CN106305389A (zh) * 2016-08-23 2017-01-11 岭南师范学院 一种可降解的锦竹草生态毡及其快速繁殖成坪方法
CN106305389B (zh) * 2016-08-23 2020-01-10 岭南师范学院 一种可降解的锦竹草生态毡及其快速繁殖成坪方法
CN108439608A (zh) * 2018-06-14 2018-08-24 安徽省大地园林工程有限公司 一种湿地公园水生植物水环境净化方法
CN109956559A (zh) * 2019-04-11 2019-07-02 吉林建筑大学 一种新型水母状立体生态浮床空间装置
CN111003795A (zh) * 2019-12-28 2020-04-14 哈尔滨工业大学 一种利用生物电化学强化浮动生态床的水体原位修复方法
CN111003795B (zh) * 2019-12-28 2022-06-03 哈尔滨工业大学 一种利用生物电化学强化浮动生态床的水体原位修复方法
CN112174329A (zh) * 2020-09-15 2021-01-05 同济大学 微电解强化型生态浮床耦合光催化的地表水生态修复装置

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